Yamaha f150 ‘04 fuel issues persist after vst service
Would love some advice if anyone can help. If I prime it I get it to run well for 15-20 seconds then it does this and starts to sputter. I replaced the vst filter and gaskets today and they looked fine, tightened it properly and no visible fuel leaks in the motor area, nothing smells like gas. Fuel to the primer ball seems fine, though the new primer ball wouldnt fill up initially when connected to both the outboard and fuel source after 50 pumps, until I disconnected past the check valve until it filled up then attached to the motor fuel lines. I may try to bleed the vst and check for air. Symptoms started last season - primer ball would go soft after the boat would be off for a bit, would hand prime and run fine. Recently it got worse, rough idle (like this but ran) but would run fine in gear. Last week I was maxing out at 3700rpm. I figured im at 480hrs on an 04’ f150xrc I should check the filters. They ended up looking fine. I put it all back together and now its even worse, does this in gear too. There was some residue on the old vst gasket but thats about it. I sprayed soapy water and saw no bubbles near the manifold fuel lines. I replaced my spark plugs yesterday too. Hope anyone has an idea.