'93 Johnson 115 with an intermittent stalling problem. It's been on-going for awhile (across several new tanks of fuel). VRO is disconnected so I pre-mix. Most of the time the engine runs like a top with no issues, but will simply stall every so often. Sometimes at idle, sometimes at full throttle. Sometimes hot, sometimes cold. It will run for an hour or more, then stall. No sputtering, just a quick loss of power and a stall. Earlier today it stalled twice within 10 minutes, then fine for 40 minutes when it stalled again.
A quick pump of the bulb and it starts right up and is fine.
Sounds like a fuel delivery issue, right? Last week I replaced all the internal hoses and the filter on the engine with new and tightened everything down to ensure no air leaks. Same problem. Today I bypassed the entire fuel system... I used portable tank with all new hoses (and new bulb) and attached it directly to the engine, bypassing the water separator and fuel shutoff. I also had the portable tank high enough where it was higher than the fuel pump and still had the same issue.
Stator and regulator/rectifier are new (3 months old) and test fine. Carbs were rebuilt by the guy I bought the motor from 6 months ago. Although the randomness of the problem leads me to believe it's still a fuel delivery problem vs a carb or ignition problem. The only thing I haven't replaced is the pump. Any other suggestions of things to look at?
A quick pump of the bulb and it starts right up and is fine.
Sounds like a fuel delivery issue, right? Last week I replaced all the internal hoses and the filter on the engine with new and tightened everything down to ensure no air leaks. Same problem. Today I bypassed the entire fuel system... I used portable tank with all new hoses (and new bulb) and attached it directly to the engine, bypassing the water separator and fuel shutoff. I also had the portable tank high enough where it was higher than the fuel pump and still had the same issue.
Stator and regulator/rectifier are new (3 months old) and test fine. Carbs were rebuilt by the guy I bought the motor from 6 months ago. Although the randomness of the problem leads me to believe it's still a fuel delivery problem vs a carb or ignition problem. The only thing I haven't replaced is the pump. Any other suggestions of things to look at?