SteveVT
Petty Officer 2nd Class
- Joined
- Jul 31, 2017
- Messages
- 163
I recently did a lot of repair work on this engine, including a carb overhaul. Boat's been out 10 times. I've had three occasions where the carb started to flood, and gas poured out of the top of the carb. The first two times it was debris from a bad NOS fuel pump gasket, which deteriorated from ethanol (replaced since). I've removed and cleaned the carb 3 times, and that is a real pain on this engine.
It has a new filter and fuel pump rebuild, as well as the carb overhaul. Debris didn't seem to be the problem this last time. Gas is clean and no obstruction in the needle jet when I checked. But for some reason the carb needle will still sometimes let fuel past when it should be closed. Both the jet and needle were replaced new with the overhaul -- OEM parts. Float adjusted level. Clip is in place.
I'm wondering if it's possible that over-pressure from the fuel pump could cause a problem like this? Or is there any other possible cause (besides dirt) that I don't know about?
It has a new filter and fuel pump rebuild, as well as the carb overhaul. Debris didn't seem to be the problem this last time. Gas is clean and no obstruction in the needle jet when I checked. But for some reason the carb needle will still sometimes let fuel past when it should be closed. Both the jet and needle were replaced new with the overhaul -- OEM parts. Float adjusted level. Clip is in place.
I'm wondering if it's possible that over-pressure from the fuel pump could cause a problem like this? Or is there any other possible cause (besides dirt) that I don't know about?