Yamaha 4 stroke 25hp

[rick_l]

I have a 2000 yamaha 4 stroke 25 hp, F25ELRY. The previous owner did not take care of the motor therefore I am rebuilding the powerhead. I have contacted Yamaha customer service and also Master Yamaha Tech. I still can't get an answer. I am having the crank turn and built back to specs. The problem is I can't seem to get the mic specs for the rod journels. Another problem that I am facing is the fact that there are three different rod bearing UR Black, Ur Blue, Ur brown. How can I know which rod bearing to use without ordering all three. If anyone has this information please HELP ME.

 

[JB]

Re: Yamaha 4 stroke 25hp

Hang in there, rick. I betcha rodbolt knows.

He will be along.

 

[Tom Garter]

2004 25 yamaha 4-stroke enrichment system

2004 25 yamaha 4-stroke enrichment system

I have a 2004 f 25c Yamaha four stroke outboard engine I have both starting problems and stalling with increased throttle.
I have cleaned the tank and replaced the water seporatore and the inline filter. The carb has been disessembled and cleaned. The fuel pump is functioning correctly and I have good fuel flow. The power coil reads at proper voltage and ohms.
I suspect the fuel enrichment system
There is power to the Electrothermal Ram however I suspect this is the problem. I read the ram's ohms at 6.2. The manual calls for 16 to 24 ohms.
Is this part bad? Would this cause the engine to stall out when I increase the throttle? Also the engine seems to smooth out some what when I restrict the air flow at the opening of the flame arrestor. The part is around $250 bucks and I would hate to make a mistake by replacing it.
If it is bad is anybody parting out this model?