Homebrew
Bronze Member
I'm hoping you guys can help me out. I'm not much of a mechanic and I'm trying to troubleshoot my PT425 w/ Robin engine. It started sputtering and now it won't start. I replaced what looked like a dirty fuel filter and fuel was flowing through that. I thought it might be the fuel pump, but after pulling the fuel line at the carburetor and cranking the starter, fuel seemed to be flowing fine from the pump. However, not much fuel is getting into the carburetor. I took the air filter housing off, and fuel appears to slowly leak into the carb if I don't turn off the inline fuel shutoff valve and let it sit. The PT will start for just a brief time then sputter out after all the gas in the carb is used up and very little appears to be pumped in. After reading this forum, sounds like I need to do some cleaning of some jets? But I guess I'm too dumb to figure out how to get the top part of the carburetor off. I've only had time to mess with it briefly, but I removed the 5 (or was it 6?) small screws, but it didn't seem to want to budge. I was afraid to beat on it any in case I was missing something. Any advice on how to get started?