ajbradshaw
New member
Hello everyone, new to the forum and appreciate any help I can get. I’ve got a 1989 Evinrude 100xp E100STLCEM. It is running really rough and can’t get to full power at WOT. So far I’ve replaced the fuel line including primer bulb, anti siphon valve, fuel tank pick up, fuel filter, spark plugs. I’m leaning towards gummed up carbs as being the issue but I just discovered a crack in the red maintenance valve and fuel was leaking out of it last time I tried to start it. Could this be why the engine is running poorly at higher speeds due to air getting into the carbs? Thanks in advance for any advice.