2003 Yamaha 150

[justkidding]

Any ideas why my Yamaha 150 breaks down at 2800 to3000rpm in the water in gear. I have used a separate fuel tank, changed plugs, clean fuel filter, and carbs. What next?

 

[sdsaw]

Re: 2003 Yamaha 150

2 stroke with carburetor or EFI?
or 4 stroke and EFI?

 

[justkidding]

Re: 2003 Yamaha 150

2 stroke with carbs

 

[cousinabe]

Re: 2003 Yamaha 150

fuel pumps?
does pumping the primer ball help?

 

[justkidding]

Re: 2003 Yamaha 150

no sorry any other ideas

 

[99yam40]

Re: 2003 Yamaha 150

A little more info is needed.
A model # is always the best way to let others know what motor is being discussed.
What does motor breaks down mean?

You can always start with compression and spark on all cylinders for basic info. Then timing. A timing light on the different plug wires may show if you are loosing spark at problem RPM.

Check fuel pressure/vacuum with a gauge to see if there is a fuel delivery problem. http://forums.iboats.com/showthread.php?t=283363

You can use a DVA adapter and DVM to check CDI outputs and inputs for troubleshooting spark problems

Carb problems is still my guess without any more info.

 

[justkidding]

Re: 2003 Yamaha 150

yamaha 150 v6 txrb

 

[justkidding]

Re: 2003 Yamaha 150

yamaha v6 150 txrb

 

[cousinabe]

Re: 2003 Yamaha 150

bad cdi?

 

[99yam40]

Re: 2003 Yamaha 150

I repeat "What does motor breaks down mean?"