2004 yamaha 225 doesn' want to go

[auxsar]

Idles fine will run 6-7 knts at idle to 2200. When I try to give it power above this it spits and bogs down. Have changed both fuel filters. Still have same problem. Any help??

 

[Ballymac]

Re: 2004 yamaha 225 doesn' want to go

Have you checked any electrical components? Might be ignition related. First, make sure the timing is correct. It could be your stator, TPS or crank sensor. You can check the crank sensor & TPS with an ohm meter. Crank sensor is static, while your TPS should show ohms change throughout the full range of motion. You should also check the TPS voltage, which should show a voltage change throughout it's full range of motion (need a multimeter to test). If both are within spec, check the high speed coils in your stator. You'll need a peak voltage meter or DVA for your multimeter. Your stator has both high and low speed coils along with a lighting coil. The high speed coils take over at anywhere between 1500 & 2500 RPM. You'll need to have the boat on the water or the engine in a test tank, in forward gear, at the suspected RPM range to test. Good luck.

 

[mobilemike]

Re: 2004 yamaha 225 doesn' want to go

HPDI? four stroke?

 

[yamatech43]

Re: 2004 yamaha 225 doesn' want to go

I'm assuming(here we go) that this is a carbed motor since you won't tell us.....if it is a carbed motor the first thing that I would consider is having the carbs cleaned and 'rebuilt' with kits that cost around 40 bucks. Yamaha electronics on this late a model are the least seldom problem on the carbed two strokes.

 

[auxsar]

Re: 2004 yamaha 225 doesn' want to go

FOUND THE PROBLEM.! There is a screen after the high pressure fuel pump. Screen was partially clogged
some debris got through all 3 fuel filters and went thru the high pressure pump but got caught on the screen before it
went to the injectors.