yamaha 50 hp 2 stroke problems

September I noticed it dropping rpm's. I chalked it up to wind chop etc, not even thinking there was a problem. Recently it has begun to die out on acceleration past 1100 rpm. No problems there. It is HARD to start 1st time of the day and idle quality is bad. Found inside – Page 11The payload problem was finally solved by adding Yamaha agricultural helicopters R - 50 and their successor RMAX to our Berkeley UAV fleet . Two Yamaha R ... 0. The Yamaha 70 hp, 60 hp and 50 hp Midrange four strokes are the go-to outboards for family, fishing and fun. The prime start is an electrical heat driven needle valve and is mounted on top of the carbie. Anyway, he sent one of his old techs out to check it out.   Your link has been automatically embedded. Hard to start cold. October 21, 2015. # XXXXX 6H5KL(NNN) NNN-NNNNH(NNN) NNN-NNNN50 TLR. I had that same issue with my 130 Yamaha and it about drove me nuts for a year. Mine has a diaphragm accessible by three or four screws. I have a new 50 hp 2 stroke on my flats boat. Forgot to mention that once it is started and warmed up it runs awesome and bump the key and it fires up no problem after that. BLOCK USER. Author: Stuart Buckingham Date Posted:30 March 2017 The most common thing I get asked over the phone to assist with is diagnosing outboard ignition problems. That worked and I didn't touch them. You may also visit the Boat Motor Manuals section of our site to obtain a service manual. I have a 90HP Yamaha 2-Stroke on the back of my HPX-V 17. I cleaned mine a while back and was told by a Yamaha mechanic who looked it up in a book he had to set the idle mixture needle valves at 1-1/2 turns from seated as a starting point and adjust from there. Upload or insert images from URL. I had a full service a couple of weeks ago and took it out yesterday, I was having a problem with. Found inside – Page 102A custom binnacle allows trim/tilt functions either separately with two ... Also new from Yamaha for 1 986 is the ProV 1 50-hp outboard (not shown). The corroded connection sent a fault code that caused the engine to switch to "limp . No-choke for Yamaha prime start motors. We had to change the fuel lines from the tank to the engine due to the inside of the line delaminating. Found inside – Page 34MERCURY 50 YAMAHA F-50 JOHNSON 50 Type/Cylinders 4-stroke/4 Type/Cylinders 4-stroke/4 Type/Cylinders 2-stroke/3 Displacement/Wt. 935cc/215 lb. I have had a similar issue with mine and i since read up that these Yamaha outboards go into limp mode when there is a temperature issue or a 2 stroke oil pump malfunction, it limits the motor to 2000rpm enough to get you back to shore. Found insideEven so , speeds beyond 50 mph or lines on the tank as seen years ago on Triumph ... for instance , houses Yamaha's EXUP powervalve , be trimmed , or the ... I had a problem for awhile on mine. posted 07-06-2004 07:08 PM ET (US) I noticed the other day that my Yamaha 4-stroke 50-HP engine was producing white smoke a little more than normal. while the above picture works on a four stroke ONLY. I know this doesn't solve your issue but i just noticed it wasn't mentioned in the forum thread. How to add Fluid to Yamaha 50HP, Found insideDetonation can be a problem with tur- bocharging, too— especially with ... The little two-wheeler is not listed in Yamaha's 1982 new-model lineup, however. The only difference I saw was that the Merc, although still slower than the E-TEC, seemed to be faster than the Yamaha. This book has always been very popular and well-used in its print edition. Relay Assy 63P-81950-00-00 Trim Relay for Yamaha Trim Relay Outboard 4 Stroke Engine F150 & 250 40HP 50HP 60HP 75HP 90HP Replace 63P819500000 TRM6003 Outboard Trim Relay (2 pins) 4.6 out of 5 stars. Gas shut off and tank valve work well. 20 inch shaft 25 inch shaft 30 inch shaft Replaces F250 lower units with dual water intakes. $19.50. It used to cold start well. He rebuilt the carbs and still could not get it to rev past 1500RPM under a load. They deliver quick starts, high performance and incredible efficiency for aluminum fishing boats, pontoons and . I have a 2 stroke Yamaha, after launching and primer pumped I put it in neutral to give it some gas, push the key in and you can hear the choke kick in, you have to hold the choke in for a little bit, then crank it and it starts pretty quick. Great bunch of folks there. $29.79. Found inside – Page 30ORDA Honda's HR173 lawnmower is powered by a 2.4horsepower fourstroko ongino ... major supplier of outboard motors , ranging from a 2 - horsepower , 50 - cc ... If this is your first visit, be sure to Like yours, once it was stared for the day you could just barely touch the key and it would fire up all day. 2007 yamaha 50 hp 2 stroke starting problems Sign in to follow this . Owner Manuals offer all the information to maintain your outboard motor. You can post now and register later. 4.9 out of 5 stars 16. Whilst I am always happy to try and help in diagnosis, it can be very hard to do so over the phone. A quick check of all connections - hose and wires - is cheap. Light and powerful, they sport 1-liter displacement, single-overhead-camshaft designs and electronic fuel injection. I'm going to take a look at it in a few days and thought I'd ask if anyone knows of any issues this model is known for that could cause it to not rev up all the way. Bought a new 2020 Yamaha F 50 in August of 2020. I would inspect the fuel pump and fuel lines for any air leaks as well. Watch our Yamaha Outboard Fuel Pump Issues video above — in which we guide you through an outboard's fuel system — to troubleshoot possible issues that may be causing fuel pump problems. Found inside – Page 40Contact jolly 40 IULY 1999 B-1-Tl 9 CERTIFIED TEST RESULTS Jolly Boat I-lard Body 420 Sport Test boat power: Single 50-hp Yamaha four-stroke outboard with ... I had a similar problem on a Yamaha 50HP 2 stroke. Found inside – Page 40Yamaha solved this problem on its new ... high-thrust T60 4-stroke outboard. ... The company also remains committed to both 2- and 4-stroke powerheads. Understand it has an automatic choke (I miss the toggle switch choke control on my old one). I have a 2003 yamaha that is running like ****. Found inside – Page 134Performance measured with two persons aboard, $6 fuel. ... TEST BOAT POWERZ Single 50hp Yamaha F50 four-stroke outboard with 57 old, 2.48" bore x 2.95" ... 2021 Yamaha 2 stroke outboards sale,9.9 15 20 25 30 40HP 50 60 70 90 115 130 150 200 HP brand new and original Suzuki and Yamaha Two stroke outboard motors sale with free shipping worldwide,5 years warranty and factory price. If the used engine has been refurbished or rebuilt, this can also increase the price over a standard used engine. Yamaha 250 HP 4 Stroke. We have available a selection of Remanufactured Powerheads for Yamaha outboards. Followers 0. Turned out to be a wiring harness where the dealer used OEM rather than the Yamaha harness, and the lower cost connectors corroded. Found inside – Page 25Some, including Bombardier, Mercury, and Yamaha, built what are known as ... These motors typically beat conventional two-strokes by 40 percent in fuel ... what kind of service did you have done to it? Found inside – Page 37... the I Yamaha 200- and Z50-hp HONORABLE MENTION I Mercury 175-hp EFI survey; ... more problems than I Evinrude 150-hp Ficht, 2stroke stem-drive folks, ... Because recreational boaters will typically use these engines for less than 100 hours per year, it is likely that the engine will fail after . Yamaha F 50 HP HETL FT JETL Outboard Motor Specification & Prices F50. Clean Used 2009 Mercury 50 HP 3 Cylinder 2 Stroke 20" Outboard Motor. Starts easy.   Pasted as rich text. Troubleshooting Your Yamaha 4-Stroke Motor Eric's Outboard - Marine Service Inc. Miami, FL (305) 251-4067 (305) 251-4067 Map & Hours Contact Us Toggle navigation. I'm not Yamaha expert, but I believe you may have an issue with your fuel pump. . A downloadable Yamaha 50hp outboard motor repair manual is a transmittable digital handbook containing repair information on how to overhaul, fix, maintain and restore the engine back to working order. Powered by Invision Community, 2007 yamaha 50 hp 2 stroke starting problems. Get the boat from the shop and can drive it for about an hour or two with no problem up and down a full range of throttle positions, after a period of time when you shift to idle speed the motor stops. Then he pulled a Phillips screw driver out of his pocket and turned two screws on a solenoid and smacked it with the handle, tightened the screws and said start it. Also replaces early F250 lower units with side water intakes. The motor looks very clean and took care of and I think it has to do with the electronic choke maybe. Exact model name 40VETO 50HETO, Both USA and CANADA models covered 40TR 50TR / 40C-50C. Typically just a visual inspection of the air filter and carburetor area is all it takes. check out the. Found inside – Page 49Yamaha , for example , uses electronically controlled exhaust valves instead ... is geared THUNDERCAT 1000 more for performance and is the of a 2 - stroke ... 128-130 lbs. V6 2-STROKE OUTBOARDS 4-STROKE MODELS ARE HERE. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features Press Copyright Contact us Creators . One of the first "Yamaha Motor Co., Ltd." began to use on a 2-stroke outboard motors separate lubrication system, which was called "Autolube". I bought a used g3 eagle 175 with a 50 hp yamaha on it and it takes some long cranks to get it started. I have a 2003 Yamaha 50 hp 2 stroke. Due to Yamaha's ongoing commitment to product improvement, we reserve the right to change, without notice, equipment, materials, specifications, and/or price. Starts and dies. We re working on a 50 HP 2 stroke Yamaha. My mechanic said it idled just fine in the water tank. We offer huge discounts on Yamaha 50 HP outboard parts . However, since a service about 2 months ago, the motor is a pig to start cold. "1701". Covers all 2-250 hp, 1-4 cylinder, V4 and V6 models, 2-stroke and 4-stroke models, includes jet drives. Took the cowl off and behind the breather was a lever with three positions on,emergency, and closed. Paste as plain text instead, × If you aren't on the water, there's plenty of things to fix around your home. × No need to worry, we have you covered. Then I also noticed the same day that it was running a bit rougher than normal and died once. Found inside – Page 144Oils for Two - Stroke Outboard Engines Table 20. Test criteria for NMMA TCW 3 - R Engine Tests Test engine : Yamaha CE 50 S Yamaha CE 50 S Mercury 15 HP ( 2 ... But despite this great variety between different models, . If I the choke lever to "emergency" it will run but not very well. I have a 2008 yamaha two stroke 50 HP. But when tested under a load; it would start to bog down and quit. Im also about to reinforce my earlier comment about being "no marine mechanic"!!! I bought it new. REPORT ABUSE. He ended up putting in a new cannister gas filter with a drain port and new gas lines. All times are GMT-5. Found inside – Page 63So Parker rigs the 23 SE with Trouble-Free Fly one hole over each tip. ... The fuel-injected 200-hp Yamaha outboard on our test boat is a good match for the ... 2. Another way to look at prices is that a used 70 hp Yamaha four-stroke outboard for sale will be more expensive than the 50 hp two-stroke Yamaha outboard for sale, but the latter may save more money on fuel in the long run. proper starting procedure is prime the carbs, turn the key. They are very simple carbs. He has had a very difficult time this year with dirty carbs. Found inside – Page 40._ Tohatsu 50 TLDI: Two strokes of green. ... FOR Honda ($6,400) and Suzuki ($6,721), and the fourcylinder 50s from Mercury ($6,009) and Yamaha ($6,210). Copyright � 2000 - 2021, Outdoor Network LLC. Don't know hours on motor. Found inside – Page 50... The boat lists at $81,100 with twin 150-hp Yamaha four-stroke outboards. ... No problem; a quartet of oversize scuppers drain this cockpit in a hurry. Found inside – Page 71210.68 Paquette and Brooks , “ Small High - Speed Two - Stroke Diesels Can Match Their Big ... types , production figures , and lubrication problems . If its damaged, that may be a culprit. Found inside – Page 99Smaller two-strokes need all the horsepower they were designed for to pull top gear on the highway', so tuning problems and lost power from engine wear will ... An exploded parts diagram is available on this site through the parts purchase. Found insideIn 1988, a far-reaching revision was issued with the title TCW 2. ... S Lubricity (seizures) Yamaha CE 50 S Power loss due to pre-ignition Mercury 15 HP (2 ... This unit has the watercooled bearing carrier.90-422-B20F fits Yamaha model number:F225TLR90-422-B25F fits t.. $1,125.00. New plugs-ignition OK on all 3. More and more sailors and powerboaters are buying and relying on electronic and electric devices aboard their boats, but few are aware of proper installation procedures or how to safely troubleshoot these devices if they go on the blink. Sorry guys forgot to mention it had a build date of 11/7. Yamaha, like Honda, just doesn't admit they buy product from Mercury, probably some confidentiality agreement. please help! A Yamaha outboard motor is a purchase of a lifetime and is the highest rated in reliability. The reed valve can be temperamental. This page was generated at 1 minute ago. Yamaha offers consumers great variety with its four-stroke outboard motor lineup. WINNER E-TEC. "Yamaha/Mercury/Mariner Outboard Repair Manual 2 - 250 HP 1995-2004"; Seloc Marine; 2007 Tips If the problem isn't in the fuel pump, that leaves the question unanswered, but one possible answer lies at the fuel tank; check the fuel tank vent first. Just Make sure cold start is with switch in auto position not the closed. When I get to 1100 rpm and attempt to go faster it bogs down and dies. In 2011 alone, the company featured 10 different four-stroke makes with dozens of different models. So that motor of yours has finally terminated itself? Engine runs fine above idle. You are invited to join our public Boat Repair Forum to seek assistance from other members. I have a 2 stroke Yamaha, after launching and primer pumped I put it in neutral to give it some gas, push the key in and you can hear the choke kick in, you have to hold the choke in for a little . A relative of mine has a 2004 50 HP 4-stroke Yamaha he bought new and it has always ran great until now. Found inside – Page 84250, Elsinore models .3630 3788 HONDA singles 63-74 all 50. ... 2-stroke 50 to 100 models .......... .36.5O YAMAHA 2-strolte 67-75 all 50 to 350 models . Designed and written to serve the needs of the professional mechanic, do-it-yourself boat enthusiast, instructor and student, these manuals are based on actual teardowns done by Seloc?s editors/authors in our on-site facility. Found inside – Page 47Yamaha's new Four Stroke outboard (left), with cam and valves (above). 2-Cycle: one Revolution Per Sequence Different Strokes: 2-Cycle Versus 4-cycle ... Yamaha Four-Stroke Outboard Motor Corrosion Defect Complaint. Instant Download Manuals for Yamaha Outboard Engines 2.5 HP 4 HP 6 HP 8 HP 9.9HP 15HP 20 HP 25 30 40 48 50 55 60 70 75 90 100 115 130 150 200 225 250 HP 4-Stroke & 2 Stroke Models. 2001 2005 Yamaha 50hp 4 Stroke Outboard Repair Manual 1/4 [EPUB] 2001 2005 Yamaha 50hp 4 Stroke Outboard Repair Manual Yachting- 2006-09 Mercury/Mariner Outboard Shop Manual-Editors of Clymer Manuals 2016-07-15 Mercury/Mariner 4 HP (1995-2006) Mercury/Mariner 5 HP (1995-2006) Mercury/Mariner 6 HP (1995-2006) Mercury/Mariner 9.9 HP (1995-2006) Mercury/Mariner 15 HP (1995-2006) Mercury/Mariner . I have a 2005 2320 SL with 250 Yami 4 stroke and the boat is in the shop for the second time in less than 2 yrs they have replaced Hi Pressure Pump. Found inside – Page 39HIA hp in . kg kg / cm ? kgm km L After bottom dead center After top dead center ... CHAPTER TWO TROUBLESHOOTING 22 2 A B 2 - STROKE GENERAL INFORMATION 39. Generally it smokes when I'm coming off cruising speed and then left at idle. . co ) pic hide this posting restore restore this posting. I suspect bizzby has the prime start model. Auto is just that. Manuals are resourceful for any user repairing or maintaining […] Thanks for the replys everybody, I think I found my problem. I sometimes add some SeaFoam to the tank of my 1959 Elgin OB, and added it to the tank of my 2006 Honda 4 stroke 5hp, and also to the tanks for my Yamaha 50hp 2-stroke. Copyright TNBassFishing.com 50. Pushing key switch does nothing. Thanks in advance for help. you should have 3 positions, close,normal and emergency. Found inside – Page 114Beam 8'9" TEST BOAT POWER Twin 150-hp Draft (max.) 2'4" Yamaha F1 50 in-line-4 four-stroke Dismacemem outboards with 163 cid, swinging (lbs., approx.; ... I have a rib with a 2004 50hp 4 stroke Yamaha that had been sat in a river with less than 20 hours use and as far as I can make out had never been opened up as the river has a 8 knot speed limit. In 2003, Yamaha announced the EXACT same engines, but carbureted, and not in the 50 HP size. Found inside – Page 75The problem is that water acts as a resistant force and builds up backpressure, which requires the engine to use horsepower to push the exhaust out. Hi All, I have a 2009 50hp two stroke yamaha with around 20 hours on it. By Streamfisher, . LIT-18616-02-65 Service Repair Manual Application: 2004-2006 Yamaha Marine Outboard 40HP (40-HP) & 50HP (50-HP) 4-Stroke Engines. Boat Motor Problems Likely to Occur After Yamaha Warranty Has Expired. Yamaha's Electronic Fuel Injection system (EFI) ensures cleaner performance and super . .....in addition to cleaning the carbs as best I can, By john allen in forum Yamaha Outboard Forum, By Ryan Hines in forum Mercury Mariner Outboard Forum, By rnewt57 in forum Yamaha Outboard Forum, By rreys90 in forum Yamaha Outboard Archive, Yamaha 50 hp 2 stroke acceleration problems, has this kit 6H4-W0093-03-00 - Carburetor Repair Kit, Forum Rules, Information and Announcements, Gas Inboard Engines, Inboard/Outboards, and Sterndrive Forum, Other Diesels Mfgs and General Diesel Questions, Miscellaneous Marine Engine Related Topics, Tubing, Water Skiing & Wake Boarding Forum, Suggestions and Feedback regarding this board and the website, Suggestions / Feeback about the MarineEngine.com site, Test posting of messages, photos and formatting, Yamaha Outboard New OEM Carb Carburetor Repair Kit 6H4-W0093-03-00 40hp, 50hp, Yamaha New OEM FUEL PUMP ASY 6E5-24410-03-00, https://www.vansoutboardparts.com/se...a-40w-50w/file, Yamaha 2004 F50 4 Stroke - Wants to stall on acceleration & runs rough/mis-fires, Acceleration Problems with 1992 Mercury 60hp 2-stroke, Yamaha 150 4-stroke 'bucking' on acceleration. 12-27-2013, 07:18 AM. Tilt not working? I googled Yamaha 703 remote and choke - it turns out there are three 703 remotes. That sounds like a dull weekend. 15hp Yamaha 2 Stroke 15'' Short Shaft Fully Serviced! Found insideGet Peak Performance from Two-Stroke Engines Do you spend more time trying to start your weed trimmer than you do enjoying your backyard? With this how-to guide, you can win the battle with the temperamental two-stroke engine. In general, a 4-stroke is heavier than a 2-stroke, but that's changing, too. Maybe more than most will want to know about prime start, but here is some Yam literature that describes this feature.   You cannot paste images directly. 1984. The aim of this book, with its superb step by step photographs and detailed diagrams is to enable every owner to understand the workings of an outboard motor (2 or 4 stroke) and be able to fix it with relative ease. Took it out of the water. By LIT-18616-02-65 Service Repair Manual Application: 2004 04' & 2005 05' Yamaha Marine Outboard 40HP (40-HP) & 50HP (50-HP) 4-Stroke Engines. Our tlr 90 has the emergency enrichment lever as its part of the electronic style choke connected to the middle carb. I have a '05 Yamaha 50 hp 2-stroke (50TLR 6H5K) that is running fairly well but won't plane and sometimes dies after going to idle after higher RPMs (WOT). When your Yamaha 50 HP outboard is down for repairs, you can't hit the water. favorite this post Sep 21 Yamaha 4, 5, 6, 8, 9.9, 15, 20, 25, 30, 40, 50 hp used parts $0 (tpa > st petersburg tyrone mall baypines area pinellas co ) hide this posting restore restore this posting. Yamaha is claiming that this was not a warranty issue sighting fuel contamination. Power Tilt & Trim works Good. Fast idle lever doesn't help. Found insidePerformance measured with two persons aboard, Tull fuel. ... But we wanted to know how a fourstroke outboard would fare in the real world, ... Found inside – Page 50Performance measured with two persons aboard, full fuel. ... 6 Price (w/0 power) $6,995 hp Yamaha F50 four-stroke outboard with 57 cid, 2.48" bore x 2.95" ... Low Hours. Clear editor. It only does this when in the water, not with running on muffs. Yamaha 50 HP 2 stroke won't go over 2000 Rpm Hi, 2004 motor sat for 15 years after only being used twice Everything looked immaculate until tried running it First was leaking fuel from overflow, replaced needle, solved problem Rebuilt all 3 carburetors At full throttle it won't go over 2000 rpm It's a two stroke Any ideas TIA By Streamfisher, . If you have an account, sign in now to post with your account. Is she Miyax of the Eskimos—or Julie of the wolves? Don't miss any of the books in Jean Craighead George's groundbreaking series: Julie of the Wolves, Julie, and Julie's Wolf Pack. I'm in the market for a new 2 stroke 50 hp Yamaha tiller model and would appreciate any feedback on performance, reliability, and any pro's or con's I should be aware of to help me with my purchase. 50ETLN. The tell-tale symptom was when you said you could manually squeeze the primer bulb and the motor would pick up. We have an early model Yamaha 2 stroke 50HP motor (50DETO 6H5). It idled fine, but when I'd open it up, it would only run at what seemed like 2/3 speed. Choke toggle switch. Any references to other companies or their products are for . Found insideTHE FAB FOUR THE FOUR-STROKE outboard isn't a new idea. ... the Yamaha F-50, the fitrstkbig puslti for foua; Ge-a" Ra1'° 20831 2-0031 1-8431 resiult of 2; ... 2007 yamaha 50 hp 2 stroke starting problems. Found inside – Page 110WHAT TO DO If Your Outboard Conks Out By Harry Walton / To remove this SAVE-IT SECTION... Pinch the following eight pages together (but don't include the ... 50ETSN. More sophisticated technologies on 2-stroke engines began to be used in the 90s of the last century and made it possible to keep powerful models in the production program that meet the environmental . It could just be low on fluid. Choke on press of ignition key. My Yamaha began Idling Rough. In fact, Honda's 50-hp 4-stroke is lighter than some conventional carbureted 2-strokes, and the 2- and 4-stroke Yamaha 150-hp engines weigh roughly the same. At the ramp, it's almost always hard to start, but on Saturday it was particularly . $10.50 $ 10. Written on: 13/11/2008. Followers 0. Original review: Aug. 15, 2021. Checked the Ignition system and repaired the problem. I have only once in my life experienced air being the problem with a 2 stroke engine not starting. Found inside – Page 48savior of the two-stroke outboard. That's what some manufacturers trumpeted a year or two ago. But instead of joyfully harvesting the promised benefits of ... I had a 2007 Yama ha VR MAX 150 that did the same thing and it was the choke , lubed it up and never had another problem . Found inside – Page 82octane rating of 84 with its 2-50 hp models . A minimum posted pump octane ... Yamaha does not recommend gasohol for use in its 2 - stroke outboards . 30. Display as a link instead, × After shutting down the engine, then trying to throttle up again, the en … read more The complaint for this lawsuit alleges that Yamaha Motor Corporation, U.S.A.(Yamaha) fraudulently sold a line of four stroke outboard motors after it became aware that the engine design had a safety defect that caused component parts to prematurely corrode, in violation of California Consumer and Unfair Competition .   Your previous content has been restored. I have a 2 stroke Yamaha, after launching and primer pumped I put it in neutral to give it some gas, push the key in and you can hear the choke kick in, you have to hold the choke in for a little . Found inside – Page 8PopULAR SCIENCE became the “What's New Magazine” in July 1969—just short of two decades ago. It wasn't a meaningless slogan: As anyone who was reading the ... (I have a 90) The only other adjustement was idle speed located on the throtlle linkage of one carb. Each had unique engineering specs, power capabilities and intended uses. So I am guessing your issue is the same as your symptoms are exactly what mine were.  Good luck and hope you get your Yamaha up and running right soon. It also has gone into the tanks for my MD2030 Volvos, 300TD and 320CDI Mercedes, and my F250 Ford. Feb 22, 2010. As sad as that is, you know what's next. I don't think you can go wrong with any of the current outboards on the market. There should be a better oil level indicator. 2007 yamaha 50 hp 2 stroke starting problems Sign in to follow this . Model Number 1050412FD (50ELPTO), Serial Number 1B775262. The 2003 Yamaha 50 still had the old specs of the discontinued Merc 50 4-stroke, which WAS a joint venture engine. Streamfisher, March 28, 2014 in Outboards, Trolling Motors, Electronics. Found inside – Page 104Yamaha's WaveRunner III seats a skipper, first mate and second mate ... Under the handlebars is a big 633-cc, 50-hp, 2-stroke engine that delivers 50 hp at ... Really hate grinding the started. For a four stroke the fuel efficiency is poor and motor is loud with the Yamaha 2.5 HP four stroke outboard engine. The 50hp E-TEC vs. the 50hp Mercury 4-stroke had almost identical results as with the first test. "Covers all 2.5-350 HP, 1-4 cylinder, V6 and V8 4-stroke models. Includes jet drives. Wiring diagrams."--Cover.
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