FUEL PROBLEM

[DKWALL]

I HAVE A YAMAHA 1995 PROV 150 LOOSES POWER FROM FUEL STARVATION. HAVE REPLACED EVERYTHING FROM THE FUEL TANK TO THE ENGINE NEW STILL HAVING PROBLEM. IT DOES NOT HAPPEN ALL THE TIME BUT SEEMS AFTER RUNNING FOR AWHILE IT WILL SHUT DOWN HAVE NOTICED THAT THE PRIMERBALL WAS FLAT I CHECKED THE VENT BY REMOVING THE GAS CAP AND STILL HAD A FLAT PRIME BALL. I PUMPED OUT THE FUEL TANK TO MAKE SURE THERE WAS NO BAD FUEL PUT NEW GAS IN TANK WENT OUT RAN APPROX. 20 MILES AND WAS COMING IN AND IT LOST POWER CHECKED PRIME BALL AND IT WAS SOFT PUMPED IT UP AND IT PICKED UP RAN SLOWER AND IT RAN FINE.

 

[Solittle]

Re: FUEL PROBLEM

DKWALL - First please do not use all caps when typing. It is known as shouting and tough on the ears of some of us older folk.<br /><br />To the problem - Most gas tank pickup tubes have a mesh screen over the tip. I suspect yours is partially blocked with crud.

 

[dick]

Re: FUEL PROBLEM

Have you pulled the pick up out of the tank ? Some pick ups will have a mesh screen at the bottom and it maybe clogged.<br />P.S. don't type in caps , it means your yelling.

 

[mjestey2001]

Re: FUEL PROBLEM

Also make sure your tank is breathing. If you have a portable tank with a closable breather hole, you may be creating too much suction in the tank for the motor to overcome.

 

[Dhadley]

Re: FUEL PROBLEM

When you said you changed everything from the tank to the motor did that include the anti-siphon valve too?<br /><br />Good luck!

 

[DKWALL]

Re: FUEL PROBLEM

Sorry for the caps. I replaced pick up tube fuel lines anti siphon, new water seperator housing and new filter new primer bulb. even emptied fuel tank to make sure no bad fuel. changed vent. what else could it be.