holgo123
Petty Officer 3rd Class
- Joined
- Jun 12, 2006
- Messages
- 89
The continuing saga... I have been trying to help my friend get his pontoon boat back in the water... Over the winter, muskrats ate through the fuel line which we discovered when he tried to make a short run to the dock to pull the boat out of the water before winter... He ran until all the fuel was used up and then got towed to shore... I replaced the line this spring after the boat sat for many months, the fuel line was not capped off, but was open and exposed all winter. When we took it to the dock, it would not fire up... I replaced the plugs (indexed) and the boat fired up, but quit after a few minutes and would not restart.... We drained the fuel tank and put in fresh gas, the boat fired up but quit when adding throttle... I replaced the fuel filter (it actually had quite a bit of water in it and other stuff...), it fired up and ran better than before, but the throttle didn't seem to control the speed, the engine would surge and gain a bunch of RPMs without moving the throttle. We would back it down and it would stall sometimes. It also would restart sometimes... We have always been able to get it resarted if we bleed fuel off of the schrader valve... I checked all the fuel injectors while the engine was running, and they all sound healthy... I pulled the plugs and they look black and sooty... I wanted to check the fuel pressure, but didn't see a valve on the supply side of the fuel manifold. What purpose does the shrader valve on the return side have? We have run it long enough now that anything in the fuel should be gone... I am wondering if the fuel pump is going...