Yamaha 350 hp outboard problems

The Suzukis 44 liters and the Yamaha V8 is only 36 lbs. A new ECU is also provided that logs time in the RPM band that is problematic.

They replaced the power heads and updated some sensors which they thouth to be the problem.

Yamaha 350 hp outboard problems. Personally I would avoid the 350s. The issues are real and although they have supposedly been fixed in later models Yamaha had to extend warranty and promise to replace flywheels as necessary and some folks had to have that done several times. The loose flywheel issue could lead to major powerhead failure.

Just spoke with my buddy again to confirm what has happened with the 350s Last year they had numerous problems with there fly wheels resulting in cracked crank shafts blowing the power heads. They replaced the power heads and updated some sensors which they thouth to be the problem. BTW there were bulletins but no recall.

Yamaha 350 HP outboard with some trim problemsVisit my bloghttpwwwjavrullanesenWelcomehtmlhttpwwwjavrullanesesBienvenidahtml. The F350 has a couple of things that are common to cause problems. First and foremost is model year of the engines your inquiring about.

For the most part there were three common things with these engines. One of which is the flywheel balancer separating. Yamaha just did a campaign which replaces the ECU and Flywheel.

This is particularly important because the engine does have one design issue which can lead to flywheel failure if its run at between 3500 and 4200 rpm for extended periods. This usually isnt an issue since the average boater cruises at closer to 4500 rpm but the ECU monitors rpm over the long haul to make sure problems can be caught prior to any failures. Yamaha is providing free flywheels at no charge for all V8 F300sF350s over and over again as needed.

A new ECU is also provided that logs time in the RPM band that is problematic. When the ECU sees X number of hours in that band then it sets a fault code. The code tells the mechanic that it is time for a new rotorflywheeldamper.

It is believed that premature engine failure and related issues are linked to a manufacturing or design defect in the coating of the exhaust components. Allegedly this defect allows hot gases to corrode the exhaust passages which in turn can lead to holes in the passages and can eventually cause a loss of horsepower smoking and engine failure. The Yamaha 350 HP V8 vs.

The new Suzuki 350 HP V6. Id like to see it on the same hull sboth with single and twin setups. On paper the Yamaha would seem to have the advantagelarger displacement at 53 liters vs.

The Suzukis 44 liters and the Yamaha V8 is only 36 lbs. HeavierBut as they say the proof is in the pudding. Yamaha 746-gallonshour x 625-lbsgallon 840-HP Yamaha 055-lbsHP-hour.

Mercury 562-gallonshour x 625-lbsgallon 840-HP Mercury 042-lbsHP-hour. We know from past experience that the BSFC of various engine types will typically fall in these ranges. 040-048 Fuel injected four-stroke gasoline automobile engines.

This listing is for a Remanufactured Yamaha F300350 HP V8 4-Stroke Gearcase which will fit models from 2008 and up. As part of the remanufacturing process all seals bearings and gears will be replaced with new parts. This lower unit is available with a XL 25 or a XXL 30 Driveshaft.

Water Pump is not included. The Yamaha outboard forum marine engines will help you find answers to Yamaha outboard problems 4 stroke Yamaha outboard problems 4 stroke Yamaha 40 hp 4 stroke problems Yamaha 200 outboard problems Yamaha 4 stroke outboard problems Yamaha 50 hp 4 stroke problems Yamaha 60 hp 4 stroke problems and Yamaha 70 hp 2 stroke problems plus a lot more as well. The Mercury Verado 350 can match the horsepower rating of the F350C but only the exotic 62-liter V8 Seven Marine 557627 can top the displacement of the big Yamaha in the outboard category.

Yamaha stresses that its normally-aspirated V8 aided by variable intake valve timing produces exactly the torque curve ideal for pushing a heavy boatrising smoothly and quickly off idle and staying fat in. Suzuki 350 HP V6 4-stroke outboard engine came out in 2017 surpassing all of its predecessors in terms of power. However under the light of the 350s fame there is a darkness of several issues.

After going through the customer feedback I have gathered the 3 most common problems with Suzuki 350 outboard and tried to give possible solutions. Yamaha Four-Stroke Outboard Motor Corrosion Defect Complaint. The complaint for this lawsuit alleges that Yamaha Motor Corporation USAYamaha 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.

This is a digital and thermal video inspection of two 2011 Yamaha 350 HP four stroke outboard engines that were tested model numbers LF350XCA and F350XCA. Yamaha Outboard Starter Troubleshooting and Replacement. If playback doesnt begin shortly try restarting your device.

Why is my Yamaha outboard overheating. A faulty water pump is a major cause of overheating-related outboard engine failures. Trimming the outboard up too much while underway or in turns can cause the water pickups to ingest air this causes a sudden loss of water pressure - not a good thing.

Click to see full answer. The problem might just be a blown fuse that needs to be swapped out. Troubleshooting Outboard Fuel Filters A blocked fuel filter can slow or reduce the amount of fuel reaching the engine.

The primary cup fuel filter and secondary in-line fuel filter should both be inspected regularly and replaced after approximately every 100 hours of use. Yamaha V8 350 HP Outboard Running. If playback doesnt begin shortly try restarting your device.

Yamaha Outboard Problem - Yamaha Outboard Forums. If its a fuel problem rebuild the carb replace the fuel filter replace the fuel line replace the fuel tank replace the fuel pump. Then lets replace the spark plugs let try the water pump.

We headed out of the Pensacola Beach Pass to do some heavy offshore fishing for Amberjack when Murphys Law struck our Yamaha outboard boat motor. Gone are those days where Yamaha was the only reliable outboard engine manufacturing company. During the last decade noticeable numbers of outboard engine manufacturers introduced their engines in the market which were technologically advanced powerful and reliable as well.

Suzuki outboard engines come next to Yamaha.