Fuel problem, please help.

[Blue_Runner]

Ouch!

[Blue_Runner]

Where are all of the internet mechanics? Taking the day off? Hello? If I don't hear back soon I'm going to go by the Honda dealership to look see about a new motor.

[nymack66]

Sorry my friend, I do not know anything about a Yamaha..

[Blue_Runner]

Nymack, its the same as a johnnyrude...just has a different word on the cowl! LOL

[nymack66]

Ok I will give it a shot,
Run it with an external portable tank to eliminate the possibility a vapour lock (clog air vent or bad fuel cap) or anti syphoning valve issue on the tank.
If problem persist you will need to do a fuel pump test, I am not sure what the procedure will be on a YamahaEvinrudeJohnson :)

[whatknot]

I'm going with the fuel pump doing a slow death on you. I think your supposed to have 45 lbs pressure on the bar. Mine crapped out recently and I was pushing 5 lbs. That's only a guess....Good luck with your real mechanic!

[willy]

Blue from my previous experience with a similar problem, make sure your primer bulb is good, I went thru three before I found a good one believe it or not. Second time with same problem, in engine filter was clogged and the fuel pumps had taken a dump.
That was inspite of a Racor 10 micron set up.
The Mercury did the same thing on me but it was a fuel line that had a small split in it and would take on air, same thing when I pumped the ball it did OK cause I was forcing fuel into the engine but let on its own the darn thing would suck air.