yamaha mechanic

[trananht1612]

i am new to boating in delaware (lewes, rehoboth, indian river area) and have an older yamaha. i have had some trouble with it lately and am looking for a good yamaha mechanic to look at it and tell me whether it is worth working on or am better off repowering. engine ran strong for a season, then the oil pump starting overfilling the remote tank and dumping oil all through the carburetor cover. that seems to be fixed now, but the biggest issue seems to be that it is just plain running like crap. sounds awful. misses, and it just sounds like the carberation is all fouled up.

i am hoping there is not a problem with a cylinder. all cylinders were okay with compression meter, but the bottom port one is a little weak. 120/119 on five. but 110 on that weak one.

 

[DennisG01]

Isn't Taylor Marine is in your neck of the woods? I've heard good things about them. I'm sure, by now, you've searched for local dealers - both Grady and Yamaha.

 

[Marty A]

Sir I am a master certified Yamaha Mechanic. With the symptoms you stated sounds like a fuel delivery issue.
If your motor is carbureted plan on carburater rebuilds. If EFI plan on a VST and injector cleaning.
In either case don't forget to check the lift pumps!! the older motors are susceptible to ethanol fuel diaphragm damage.
the low compression on #6 cylinder may improve once repairs are made. with #6 being the bottom cylinder and
gravity being what it is that would be the cylinder to be washed down with fuel if there is a rich condition.
hope this helps.

Marty