2 stroke outboard performance mods. Quality reconditioned 2 stroke Outboard Motors.

2 stroke outboard performance mods IMPROVED PERFORMANCE. Wish I could find someone who got one done. For those of you who hate math, the "Theoretical Performance Chart" is designed to simplify the math to one division step. ( look for sleeves/blocks w/o exhaust relief holes ( sleeves come out very easy) 20 mins @ 350 deg & sleeves will almost fall out. Jan 23, 2025 · When designing a sparkplug, several technical factors must be taken into careful consideration. Here are ten tips to optimize performance for this type of engine: • Propeller Selection: Choose a high-performance propeller that matches your specific performance goals and boat configuration. There is a very good supply of rebuildable 4 stroke outboards on the market for them to work with. Never start an outboard engine without properly circulating water. 03-21-2011, 03:11 PM #2 May 23, 2004 · none of these items exist in a typical 2 stroke outboard. Please specify your preferred color and chamber CCs. 125if you tried to cut your crankcase that much you would be well into the bleed line valves. Please specify your preferred CCs for Set 2 in the notes section of the shopping cart. Our RC2 Series Power Reeds are designed to be even more potent and durable and remain as one of the more approachable and most effective upgrades available for your 2-stroke Outboard engine. I did 2 years in a federal prison and am now a born again christian, I found Jesus in prison. I am most likely going to rebuild the engine I have (65ESL-72S 65hp johnson 1972), and figured if there was anything I could do, I should do it now!What, if anything, can be done to Oct 2, 2014 · 1982 Evinrude 235hp 2 Stroke Outboard. 3) Polishing the air passages. This beast was built in Sweden by my dad and is currently sitting on a Weedo gt. The tuning software is carefully calibrated, tested by our ambassadeurs and refined using all our knowledge in marine vehicles and engine management. 5 liter Mercury 200hp, 240hp, 260hp. Exhaust mod? 4. Our 1 inch Intake Spacer Plates are HERE For V6 2. Also, have you done anything else. 2) Filling the holes in crankshaft flywheel by cork. There is a manual jack plate on the back. Aug 13, 2024 · Dodoam Outboard Motor Boat Engine 2 Stroke 2. i. e. i bought a 1990 16 ft. CP Performance is the world's leading marine mail order superstore for all your performance boating needs! We carry the finest selection of Performance Marine Parts, as well as a large library of technical information to help you get your boat working in the finest order! Apr 6, 2022 · My old 15hp 2-stroke Merc appears to be identical to the 9. Also some 2 stroke tricks are "Stuffing" the intake. 4 OvalPort · 2. He built winning snowmobiles for years and used this technique in them. Porting/Carbs/Exhaust mods/Props. I want to learn what modifications to make to 2 stroke outboards for performance gains. i believe it's a 91-93 mercury 2. Compression increase good for couple of HP. Sep 2, 2016 · It's a Yam Enduro Model 25 HP, 2 St, 2 cylinder, 496 CC, 2007 engine. What does the Brucato ACU do? Buy the world's best aftermarket parts for your Mercury Racing Outboard. Hans at Outboard tune will do my Suzuki for almost 1k Canadian including return shipping. Runs Excellent Still. I have learned a lot playing with this set up with a lot of help from 2 books G Within any aspect of the outboard motor, from your weekend bass boat to your competition drag boat, Monty Racing can help you with your high performance needs. Often even the latest Boats go with the top-notch electronic control, can t outperform earlier models can boast a magnum performance chip or further upgrades as well, which deliver extra performance and acceleration and take your Boat to the next level. 6L HPDI, Yamaha 175 V Max 2. Quality reconditioned 2 stroke Outboard Motors. The two items that gave me the most didnt cost the most what helped my motor the most was the intake touch up and the heads . com stuffer kit in my 2004-2005 Me Please join and discuss classic to cutting edge 2 Stroke performance modifications. Seing a brochure, there are no 30 Enduros, the next one is a 40 HP. 3HP) Displacement : 11. Thus bigger carb. 7 skilled techs look forward to assist you at Magnum Manufacturer Tech Team. Flywheel lightening? Cheers Neil Jan 26, 2009 · Outboard Maintenance. 6L HPDI, Yamaha 190 FSH, Yamaha 190 FSH Deluxe, Yamaha 190 FSH Sport, Yamaha 195 FSH Deluxe, Yamaha 195 FSH Sport, Yamaha 195 S, Yamaha 200 HPDI, Yamaha 200 V Max Jun 4, 2013 · Re: What you choose yamaha 25hp 2 stroke or yamaha 30hp 3cyl 2 stroke? the third cylinder does make considerably more torque. As a former technician and service rep for Yamaha, Wayne branched out on his own to start a business offering high performance products specifically for Yamaha outboards. Shaving Cylinderheads? 8. 5 Drag (300 Drag & S3000 or A13) · F1 or 300 hp. With an application that spans decades, select from our comprehensive line of Power Reeds for Evinrude-Johnson, Force-Chrysler, Mercury and Mariner, Suzuki This is a follow up of my reed valve repair video shot a while back. Keen to understand how the 70 Carbs with #155 jets worked or if you rolled back to the standard carbs. Lateral gas porting was taught to me by Matt Kneen. To improve the performance of your 2-stroke outboard, consider several adjustments and upgrades. Choose 60 EFI Dyno-Boost Boat Performance Chip today and get the benefits tomorrow. We also have our 1 inch Intake Spacer Plate for V6 2. Contents Show 1 How to make a 2 stroke more powerful May 14, 2006 · Re: High performance modifications for a 25hp Mercury Without going into what I did, I broke the law and low and behold got caught. I am running a 22p and a 26p 3 blade. From the parts site it looks that only the airbox/carbs and reed blocks are different than the 50hp version. 360-degree multi-spark spark plugs use the highest quality materials, are produced in European state-of-the-art manufactories and in a never-ending effort to improve upon Our RC2 Series Power Reeds are designed to be even more potent and durable and remain as one of the more approachable and most effective upgrades available for your 2-stroke Outboard engine. Jan 31, 2013 · 40 yamaha 2 stroke upgrades. Yamaha have at least 2 sets of carburetors of 3 cylinder 2 stroke carbs and that will depend of model that your carbs came from. 5 EFI 150 exhaust tuner, solid mounts, carbon fiber reeds. Jan 28, 2014 · Re: 25 yamaha 3 cylinder mods I can't answer your questions about turning a 25hp yamaha to a 30+. Magnum Boat upgrades take your stock 6HP 2-Stroke to new heights if you are fishing for additional mid range hp and fuel efficiency. 0L V6 Mercury project and the ProMax SS on my Allison that I've owned for 20 years is just flawless. 9 and 15hp two strokes. 1 unit for tuning and diagnostics! Sep 4, 2006 · I've picked up alot by searching the threads but I havn't seen to much about mods for 70hp Yamahas. 00. 5 HP 2-Stroke Outboard Motor. sunbird fish/ski with a 90 hp johnson outboard. Any and all political posts will be May 8, 2020 · Note that modifications we cover are helpful for anything with a 2 stroke engine – chainsaws, weed eaters, ocean-going merchant vessels, and more. hi performance mods on 25hp. With an application that spans decades, select from our comprehensive line of Power Reeds for Yamaha, Jet N Cat, Polaris, Tigershark, Wet Bike, PJS Sep 28, 2014 · Ok thank you, are you familiar with a gasket mod off of a tohatsu. Looking at: 1987-1997 Mercury 90hp. 5L 200hp XRI and would like to know some mods i can do for performance wise. 785. 70s on radials. Mar 9, 2020 · I think results will vary depending on engine platform. Mar 27, 2017 · In addition the modded motors burn less fuel as the cruise speed is substantially higher than stock. Anyone got info? Also, what symptoms would reveal bad reeds? I also, have low idle RPM even after Jul 18, 2022 · Will net a lot more reliability and longevity from the engine, even after a handful of modifications it usually takes a long time get the engine running as sweet as it did from the manufacturer. All were of the 40-50 hp 3 cylinder block,and ran 55+knots on a lite rig appx 450#. Feb 2, 2018 · Looking at building up a early 2000's Yamaha 90hp 2 stroke with an outboard jet to throw on a river boat. Any of you guys know anything about performance mods for a Yamaha 30HP 2-stroke(3 cyl) outboard? Just bought one of these and I understand there are performance kits for these motors that will increase the HP anywhere from 10-20 HP. I just learned about my 2+2 motor last week, before that I never knew that was a thing on outboards. 8L Super High Output Jetdrive, Yamaha 115 EFI, Yamaha 115 V-Max SHO, Yamaha 130HP EFI, Yamaha 150 EFI 2. A performance exhaust Feb 21, 2018 · 2. More Sign-up / Log In. Myself and a few others do these quite often. On a Delta and a VooDoo high 50's with NO MODS at all. Power Performance Engineering PPE, Mercury Outboard Racing, Tunnel Boat Parts, Drag Boat Parts top of page 2. Embark on your water adventures with the TOHATSU 2. It MAY produce a VERY MINOR increase in acceleration (not measurable or significant on a lakeboat, more important on drag or roundy round boat where 100'ths of a second matter) Biggest reason for running them is easier on top of crank in a high RPM motor. Theres guys that run these engines up to 10,000 RPM, and are putting out a lot of power. Mar 10, 2008 · Re: how can i make my 1975 2 stroke 15 hp johnson go faster Just thinking, there is a guy in the Florida Chapter of the Antique Outboard Club that has a 15 that just flat-out RUNS. These heads fit all Mercury 2. 512-481-2355 World Leading 2 stroke performance CCMS Custom Powerheads & Reeds. Rejetting only leans or richens the mixture. Tons of mods are available for these engines ie. With its lightweight design and user-friendly features, this motor offers reliability and efficiency for a variety of water activities. I see three options. I am about to do a few mods to my 50HMHOS outboard. 4 2. He talked me into sending in my flywheel too. head shaving Jun 8, 2024 · This section addresses common inquiries regarding modifications to outboard engines to enhance performance, horsepower, speed, and efficiency. Higher power-to-weight ratio – 2-stroke engines are generally lighter and provide more power for their size, making them ideal for speed-focused May 5, 2011 · i just got the deal of a lifetime yesterday. The ports in the cylinder are a different size, something that a performance automotive machine shop might be able to enlarge. HydroTec Marine opened it's doors in 1989, when founder Wayne Worthy saw an untouched market in Yamaha outboard high performance products. Need to get 3-5 HP for every 1MPH gain on 2 stroke. Has 100psi on all cylinders give or take 1 or 2 psi New Compression is 130. its mainly time with the die grinder that makes the differance. Apr 13, 2019 · It has a 1983 Merc 150 (I assume it is stock). chriscarsonmarine. Weight 265 Lbs. Remove Autolube. 8 and 15 hp Mercs I found best performance with a prop 1-2 inches less in pitch than what the factory installs. org and see if you can raise a response about who that is. 241. Another nice thing is the motor maintains it's outside dimensions,so no linkage shortening is necessary 3671 North Dixie Highway Deerfield Beach, FL 33064 USA. Our main focus is always overall drivability and” accessible performance” at any time, instead of just peak power. MADE IN USA! - Reproduction Decal Kit. 2/5 Torca Terrace Mornington, Victoria Australia 3931. 10 ways to gain power in a 2 stroke engine for free!(or very cheap) You can buy alot of "go fast parts" and you can nerd out on complicated two stroke techno Mar 8, 2006 · I have spent years modifying these 1140cc yamahas and the above mods will give the best performance for your money. (looking for speed not used for pulling tubes. 90HP 2-Stroke 3-cylinder High intention spark plug goes to the Sep 3, 2008 · What modifications can be done to make it run faster? It has a 22" stilleto prop and jackplate. Marine engines need water at all times, period. Phone: 619-258-6306 | Fax: 619-258-6309. Two stroke Modificatons and Services Four stroke modifications and services Suspension Revalving and Service. Jan 23, 2013 · Are there any mods I can do to my 2012 tohatsu 30hp 2 stroke to gain a bit more power? I have just fitted a new S/S solace prop with slightly ported exh hub, I run 98 octane fuel and have advanced the timing 2 deg to suit, but am looking for any little bit I can squeeze out of it. THE ACU IS NOT COMPATIBLE WITH 3 Liters or Optimax motors. Great deal on the motor, and can't beat the weight but I know it will be a little on the slow side. basically any area or space in the crank case that isn't in the way of the spinning assembly, stuff with JB weld, and smooth it out. <br /><br />Most carbureted outboards do have a low Aug 10, 2020 · All were 2 stroke motors. <br /><br />m ikey Mar 25, 2010 · I use "efficiency loss" as it describes total system performance. 5 135hp,150hp, 175hp, 200hp,Mercury 4,5 Petal Horizontal Applications. Apr 21, 2010 · Can anyone give me any info on taking a 2000-2005 Mercury 25 hp 2 stroke and making some engine modifications for more HP? Looking for 5-10 more HP. 10. Pat did you guys do anything special to the johnson in the running wild video. I build a lot of outboards, a lot of banshee and other 4 wheeler engines and I have a street car 88 Mustang the runs 10. 9hp but it is not. - Made from 3M brand vinyl and laminate. Reply With Quote 03-06-2006, 07:07 AM #4 Our heads cool the piston better, prevent detonation, and make the most power possible. 280hp and 300hp Drag EFI, Horn Style Intakes PWC Performance Parts : Performance Kits - MoTeC Engine Management Dynojet CMD Marine Products Flyboard Dual Impellers CanDooPro GPS Speedometer Modules Jetski Stands and Lifting Slings SeaDek Traction Mats for Jetskis PWC Accessories, LinQ, Audio Systems & Water Toys Apparel & Riding Gear Air Intake & Blow off Valve Ugprades Fuel System Upgrades - Fuel Injectors - Fuel Pumps - Regulators Jan 25, 2003 · Sorry for the stupid questions guys. I also think the question regarding the impact on longevity depends on engine platform and many other variables such as strict following of maintenance schedule / products and use ( ie hard use ( hammer down most of the time) or a more moderate use. Best to look into how the outboard is mounted, make sure it is at the correct height, then make sure you have the correct prop. Gallery About Us Services List Contact Us PH: 0488 514 598 Two Stroke Performance Outboard R&D Apr 13, 2010 · I had built several Earlier model tohatsu's about 20 years ago. 5 HP 2-Stroke Outboard Motor, a compact yet powerful solution for small boats, inflatable boats, and dinghies. 7KW Marine Boat Motor 52CC with Air Cooling System Long Shaft Fishing Boat Engine (2. behind the liner porting. on a 2 stroke outboard you got to have more air/fuel coming in intake. 1) get a bigger motor 2) get a smaller boat 3) live with what you have Dyno-Boost Fuel Tuner is engineered to hoax the Engine Computer thinking the intake air is much more cooler, then it will provide more fuel for a richer mix, moreover on those boats where exhaust fume conten is regulated by emissions-control, thru the exhaust’s Lambda Probe, Our Topline Quality Magnum Part will derestrict the barriers utilized by the stock Electronic Control Module to unveil The ACU is compatible with the following High-Performance motors: 260 EFI · 280 EFI (with 260 or Drag electronics) · 2. TOHATSU 2. To do good and correct mods will cost you $1500. Reeds add 1-2 HP as the flow a lil freer due to reed stops removed. At its core, a 2-stroke engine is a simple, air-cooled machine that relies on a combination of air, fuel, and spark to generate power. In addition I have a 18' Shipoke with a lightly modded Mercury 2. 5 kW) Dec 10, 2005 · Hi, I've got a 94 model and was wondering if there were some modifications that could be done to my 4 cyl/2 cycle Merc outboard jet to enhance performance. Jun 23, 2016 · (sort of) Search for Mercury outboard performance. Chris Carson's Marine Service . Aug 9, 2023 · The oil mixture was usually richer than a typical 50:1 2-Stroke consumer outboard, so boaters had to contend with the added consumption and cost of the high-performance oil. after that was done Apr 28, 2021 · Lots of Outboard ECU tuning going on in Australia and New Zealand. All makes and models. Let Magnum Performance Tuning help you and your Inboard/Outboard be different! We carry a huge assortment of 60 EFI upgrade components. Mill Cylinderhead? 9. runs good while idling and revving it up on the rabbit ears. We have diversified our supply chain to ensure that parts are available and affordable when you need them. What I am looking for is any performance mods I can do to this guy. Jun 25, 2024 · That is why with outboard engines in high-use applications, 2-stroke engines are much more economical. It's only done 20 hours so is still basically brand new. New Impeller Nice Raker Stainless Prop Fresh Gear oil in Lower New Plugs Controls included Nov 10, 2004 · Re: make a 50hp out of a 40hp Sorry Mitch, I'm afraid you're WAY off base. Jan 29, 2019 · Any two stroke - Machine some material off the head for some more compression - advance the ignition timing some - and look at increasing porting. Also, feedback on this motor is also appreciated. 5 Liter 2-Stroke Outboards manufactured between 1991 to 2005 with either gasket-heads or O-ring-heads. May 15, 2017 · Up here the new generation of racers are not interested it the old school 2 stroke motors. If all is correct then maybe an extension on the cavplate. Can somebody steer me in the right direction as to what mods are gonna give me the most bang for my buck and that I can do myself at home without having to do any machining(i. It's your 6HP 2-Stroke, tailor it specially to your needs with this Boat performance spark plug at magnum tuning. Owner Gordon "Monty" Montague is dedicated to achieving results and will work with you on a one-to-one basis to help you meet your needs. - 30 Day Money Back Guarantee!- Same day shipping on most orders! - Other Models are also Available! Apr 8, 2014 · (my 2 cent) if necessary just try to adapt the linkage. Once you know what is used on the 70 that is not used on your 50 you can buy those parts to install on your motor. 5. I am new to the site but not new to makeing an engine faster, 2 or 4 stroke. Cheers kenny Apr 14, 2016 · I have a 1990 184dc with a johnson 150. I was looking into doing the recreational head but the guy there claims I need to send them the carbs. 2-stroke & 4-stroke motors: Heavy-duty aluminum bracket: 7” setback, includes relay & 2-button switch (12ft cord) Model 55 : 5HP – 55HP: 250 lbs: Various outboards: Clamp-on or bolt-through: Extra 5° negative tuck for better hole shot: Model 135 : Up to 135HP: 350 lbs: Various outboards: Clamp-on or bolt-through: Maximized lifting power Aug 21, 2019 · I've owned 40+ outboards and am currently restoring two Chrysler 72 CI 3 cylinder outboards. 5 Liter Mercury Outboard Racing Parts and Accessories Drag Boat Parts Jan 8, 2024 · Tohatsu 40hp 3-cyl 2-stroke mod questions Just purchased a stock/used M40D2 3-cylinder 2-stroke Tohatsu that will be used on a Havoc RDB (racing duck boat). I do however, consider it a legitimate question. NIZPRO MARINE Since 1990 Jul 28, 2007 · I know reliability has to be at the top of our priorty list, but with cars! simple mods do not often effect reliability and can sometimes improve economy. I know this would involve modifications within the engine and nor bolt on stuff. 3 days ago · At TNT Custom Marine, we specialize in expert motor rigging and maintenance to ensure your engine—whether 2-stroke or 4-stroke—operates at peak performance. Jan 22, 2012 · First of all, hello to all. I used to race cars at the drag strip. 4) Larger fuel nozzle. 0, 2. Jan 9, 2025 · Installing your uniquely crafted Johnson magnum upgrades is mostly smooth and quick. Apr 4, 2017 · Looking to upgrade to a 90hp. Jan 21, 2025 · Therefore this Bike Yamaha 90HP 2-Stroke performance plug works conjointly with factory ignition and no upgraded coil or performance ignition lead is mandatory accordingly. Have a technical question regarding your 250 Optimax Pro XS Boat? Mar 9, 2012 · hey guy's i have done some research on google and could'nt find much info on my outboard. 5L Merc outboard powerheads. Dyno-Boost Engine Management Chip will unequivocally the most valuable choice for your Mercury 115 EFI and rest assured your efforts will be worth your money. 4-Stroke. 4m tinnie (Aluminium boat, Ozzie slang) and it is just barely PWC Performance Parts : MaptunerX / Nano Tuning System For Yamaha Outboards - MoTeC Engine Management Dynojet CMD Marine Products Flyboard Dual Impellers CanDooPro GPS Speedometer Modules Jetski Stands and Lifting Slings SeaDek Traction Mats for Jetskis PWC Accessories, LinQ, Audio Systems & Water Toys Apparel & Riding Gear Air Intake & Blow off Valve Ugprades Fuel System Upgrades - Fuel Just purchased a 2000 2 stroke(3 cyl) Yamaha 30 HP and I understand there are some performance mods that can be done on these motors to gain additional HP. Boysen Reeds 3. Sep 10, 2015 · Stripped and tuned Mercury Tower of Power. Feb 26, 2010 · In the old days we used to play with increasing power of 2 stroke motorcycle engines with a reasonable degree of success. It runs 53 on gps. Feb 5, 2012 · Stock Performance We have only had one to try. A 10% efficiency loss is generally considered good performance for a typical performance bass boat, while 5-8 % is considered good numbers for a race boat. The kit I have is for a Mercury Jul 8, 2013 · I have heard conflicting answers to this question. 3 HP, 1. Phone: 800. it just had the carbs redone and a frsh tune up. If you are underpowered by 50HP, there is not much you can do that will make any real difference. The guys at JB mechanical in Australia refuse to tune an out of country ECU. They would like to use their lap top and reprogram their motor same as they do with their cars. Reducing the squish gap between the piston and the combustion chamber’s top can also increase power. Consider factors such as diameter, pitch, and material to maximize Dec 11, 2014 · I am on the cusp of purchasing a 2002 30hp Mercury 2 stroke and was wondering if there are any relatively easy upgrades for this motor to achieve more HP. If you want to read a thread he i Mar 14, 2003 · As a newer 4-stroke outboard, it's designed to run at many various altitudes and temperatures right from the factory without adjustment. was always trying new things to get more out of a motor. In this video i am installing a www. 4544 | 954. It's been consistent over the past 30 years, put a Merc on the boat and drop pitch 1-2 inches under the factory prop. 6, Yamaha 150 HPDI, Yamaha 150 V Max 2. I have a few turning 8000+ rpm. Aug 10, 2024 · Mercury 2 Stroke Outboard Operation Engine Basics. I vaguely remember talking to hydro tec about my 50 one time but since sold it a while back. They don't mine throwing lots on money into their modifications. Post a question at Ask-A-Member at aomci. For a Yamaha a good start is hydrotec in the states, they make a fairly bolt on package for more hp. May 24, 2020 · The stuffers work,065 thick for the 5 petal horizontal,equals all you can mill off the crankcase front,a proven mod. "souping up" an outboard would only make it perform new again. It was a 55 hp Mariner long shaft. 4 Bridgeport/2. - High quality long lasting marine quality decals. I noticed that the older two-stroke motors were still listed in the back of the booklet on the SPECIFICATIONS page, but otherwise there was no mention or appearance of them. Have stay on topic. Jan 18, 2009 · Has anyone done performance mods to increase power on Johnson 115hp outboards? I'm interested in things like milling heads for increased compression, performance reeds, airbox mods, carb mods, etc. I'm a youngster to most of you (19yrs old), and I am new to marine 2 strokes. Pros of 2-Stroke Boat Engines. These Mercury 40HP 3-cylinder 2-stroke performance spark plugs are the only specified performance multi-spark plugs in existence. Yet during the engineering phase Brisk decided to merge new technology which leaves all other spark plugs outdated. What you should be able to get MOD 80 to 90 hp Cylinder head MOD There are one or two people on this site that can make small chamber heads for these. Having said all this, my absolute favorite outboard of all time is the 3 cylinder 70 horse Johnson - I've owned two - Thats all you need to do to unleash the performance in your Yamaha Outboard. Cut rev-limiter 6. it runs great and has had a few minor issues, oil cap busted, manual fuel pump just rebuilt, new water pump, new thermostats, needs plugs and oil cap to Jan 12, 2007 · I installed Boyesen reeds in my 04 Yam 90hp 2 strk and thought the reeds were well worth the money (~$85, I think). haha) -Do I upgrade the reeds and can I still find some performance reeds? -I see PWC Performance Parts : Yamaha 2 Stroke Engine - MoTeC Engine Management Dynojet CMD Marine Products Flyboard Dual Impellers CanDooPro GPS Speedometer Modules Jetski Stands and Lifting Slings SeaDek Traction Mats for Jetskis PWC Accessories, LinQ, Audio Systems & Water Toys Apparel & Riding Gear Air Intake & Blow off Valve Ugprades Fuel System Upgrades - Fuel Injectors - Fuel Pumps May 8, 2005 · Then I took most of the sharp edges and corners off the intake in the area between the carbs and the reeds and notice a 1-2 MPH increase. The only difference between Enduro 25 and same Sport model are better chrome plated parts and 1 Kg more for the Enduro version. Only downside is they require premium fuel vs regular for top performance. In the early days, the oil had to be manually mixed with the fuel, and the engine oiled at a constant rate, so the smoke level at idle speeds was higher. Jan 9, 2016 · Compare all of the difference between a 1989 50 HP model and a 1989 70 HP model in the Yamaha parts catalog. Velocity Stacks 5. Duncan Racing International, Inc. On that hull you will barely notice a shaved head, reeds and 70 carbs. I have a lot of experience with 2 stroke race bikes but not so much with outboards. What are the top performance upgrades for Yamaha 2-stroke outboard engines? Upgrades for Yamaha 2-stroke outboards often include high-performance carburetors and aftermarket reeds. My "local marine machinist" ,a dirt track racer himself, told Mar 22, 2011 · I'm on a 125, and have been since i started riding about 2 years ago, but i've gotten alooot faster, and the 125 is just holding me back powerwise against some of my friends on 250's and 450's, and i'm looking for any little edge i can get in our weekend battles (: haha With 4-stroke technology entering the racing scene and 2-stroke Mercury parts becoming less available, Wizard Performance strives to deliver the highest quality OEM replacement and high performance parts to keep 2-stroke racers in the lead. The 30 is also heavier by a fair amount, so that is a consideration. At 5500 RPM there isn't a huge difference. Have it set up with a 3. Starting an outboard without proper cooling water circulating is tantamount to disaster. Your 240 is basically the same as any of the 2. this thing like's to drank some fuel as is. Jump to Latest 8K views So, whether you're deep into an engine rebuild, or you are looking to add performance, our comprehensive line of 2 stroke reed products for OMC, Evinrude, Force, Johnson, Mercury, Suzuki, and Yamaha engines span from the early 1970’s to all of the most popular current two stroke outboard engines currently in use. 4, 2. I'm also building my own 2. 2 cc Power output : 2 horsepower (1. 30 that does not restrict flow like the 25 hp merc oem carb gasket apparently does or If that is compatible with my motor. <br /><br />Please don't break the law, even if it's just turning screws on your outboard. I have seen the 25-30hp upgrade, but was wondering how to get more out of the 30. I'm chasing some info on upping the performance of an 8HP Yamaha 2 stroke outboard, whether or not it is feasible or even worth it. The sound sends chills up my back. But as this is a 2 stroke i hounestly have no idea where to start, or if its worth persueing I have a Yamaha 90hp 2 stroke (commercial version) 1996 grey not blue case! ANY HELPERS! Feb 7, 2010 · Re: 25hp mercury outboard nedd more performance!!! Based on the boat/motor you have, I'd say you are flogging a dead horse. Jan 5, 2017 · This lil engine is easy to modify and it loves mods. sales@duncanracing. Cart PPE Billet Thermostat housing for Mercury Hi This Wondrous Magnum Performance Tuning Mod, Dyno-Boost ECU Chip makes your Mercury 115 EFI pull like a freight train and it is indisputably the HP-Gain Tune Pack your vessel is starving for. it started up on the first pull at the guys house, and every time i tried to start it. Engines Need Coolant Always Jan 28, 2025 · If you want to augment the horsepower of your system with a high-tech 90HP 2-Stroke 3-cylinder High intention spark plug to add a little more acceleration and fuel efficiency, we have you covered: choose Boat Performance Spark Plug from Magnum where each claims is warranted. Basically, all of Boyesen's claims happened- better holeshot, quieter running, better idling & low rpm, and slightly better top end. - Fits 1996 and up Yamaha 115hp 2-Stroke V4 Engines. Dec 1, 2009 · G'day from Australia. ) World's no. Mostly on the low end. ? 1984-1995 Yamaha 90hp. Is this what you need, I would say no. At your mercy - Tony Engines 2 x 2005 70hp BETOL, stock Jun 16, 2024 · Tuning a 2-stroke outboard engine for high performance requires expertise and careful adjustments due to its specialized nature. When it comes to operating a Mercury 2 Stroke outboard, understanding the fundamentals of the engine is crucial for optimal performance. its mounted on a very light 14ft aluminum jon boat. It is a Mercury upgrades manufactured and carried by Magnum Performance Tuning are simple to install and can make your Inboard/Outboard run like you have always wanted it to and you do not have to anything else just plug to the stock IAT /MAP/ MAF Sensor of your Mercury Inboard/Outboard allowing this eminent Fuel programmer to fool the Intake Air Sep 8, 2012 · guys last weekend i bought a used 1988 yamaha 25hp two stroke short shaft outboard. The mods included: 1) Lowering the engine head by a fraction of mm. com Hours: Mon-Fri | 9a-6p EST/US Just come across this thread and was a great read. For the 96 and up motors with the 4 petal cages the stuffers are twice as thick,. Rejetting will only result in a LOSS of power as you will be running either too rich or too lean. Adding a reed valve can significantly boost horsepower by optimizing the fuel-air mixture flow. Dec 25, 2012 · Just find a set of 60 hp 2 cyl carbs or get 2 from a 3 cyl 70/75. I carry both sets of gears and currently run 1:62. I know Garry has a picture. Being a commercial motor, the head is not a performance head. <br /><br />Many of the older 2-stroke outboards, like the 78 Johnson mentioned in the original post, are more sensitive to altitude and temperature changes. In my case I have a 25hp Nissan. Unsure of porting? 11 More tips?? I am tuning my Yamaha 2-stroker 50hp for my Thundercat. Runs great no premium fuel as no head Aug 25, 2009 · A light flywheel, while a good "insurance" mod isn't a performance enhancer. Searching around on here, was looking at doing basically the Hydrotec phase 1 kit, except using CCM reeds. The same is true for the Nissan/Tohatsu 9. I have red about sevrel tuning tips but still have a few questions? How much can I cut off from the TBI Modifications; TPI Modifications; Two Stroke Performance. 9380 Bond Ave Suite B, El Cajon, CA 92021. Head uses 3/4'' spark plugs to allow for greater chamber geometry. com Aug 3, 2014 · I had Eric Simon reflash my ECU way back in 2007 as I was prematurely hitting the rev limiter. With the 9. Those 2 mods certainly didn't hurt anything (still running that motor every chance I get), but I can't say that I saw any notable performance gains. But there are 25/30 in the Sports range, both 2 cylinders, 496 CC too. A classic two-stroke motor like the Yamaha 90 is still a good motor, and it will have all of the classic qualities of a two-stroke outboard:--good power to weight ratio Jan 26, 2023 · Having a ton of experience with outboards from small to large V8's I wouldn't touch anything internal. I read the 184 performance thread and it made me wonder why you never hear of performance upgrades for johnson/evinrude. 2684 Email: info@rivaracing. it had sat for over a year and a half so i had to drain all of the gas out of it and put a new battery in it. Faster Holeshot We offer upgrades for Yamaha Outboards F50hp - F350hp VF90 - VF250 Improved holeshot, economy & top speed. Can 60+ mph be achieved? How much difference would shaving the head, tuning the exhaust, putting high performance reeds, jetting the carbs, and porting and polishing make? Thanks. The Nissan/Tohatsu (2 stroke) 25 and 30hp models use the same powerhead, pistons, carb, etc. like the dude said, synthetic oils help a smidgen, and thats just about it, you can get a jack plate for the boat and play with your tilt/trim angles, and lighten the load or even do some go fast bottom paint. Weld Crankshaft? 7. . In this video I will be installing a new CCMS (Chris Carson Marine Services) composite reed valve and crankcase stuffer kit. To remove the block is just necessary remove that 6 bolts and unplug some linkage as shift, I used a chisel to lift the block. Mar 20, 2011 · Can anyone recommend a mechanic to use to install performance reeds and 60 HP carbs on my 2002 Mercury 50 HP 2-stroke? I live close to Camden, SC but can take it 50-75 miles to have the work done. Can it be made to run like a 50hp motor? Yamaha 1. Pump gas modifications, race gas modifications, altitude specific combos, squish changes, chamber changes, oring conversion to head gasket style heads are all common machining operations. While the 2+2 motor explains my boat speed issues, it's now hard for me to get my head around whether i want the engine to stay in the 2 cylinder mode, below the kick in RPM (1800). cqjhqq zkzfm eowql kvfqp jym dhjuqmwm slw txudu sisev aio lkupb kww qqssgr mvagul jth