Reply To: Evinrude 18HP 1960 low power

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August 2, 2023 at 5:09 pm #278756
Don
Participant

    US Member

    Well, perhaps the inlet needle/float is stuck/defective.  Did you use OEM parts on the carb?  Many of the cheap parts are cheap for a reason.  Start the engine up, then unplug the fuel line….  If engine performance seems to come back before it runs out of fuel, then the carb is probably flooding over.

    Nonetheless, you feel that the engine is running on one cylinder.  This could very well be the case as well.  Perhaps one of the reed valves has failed/got stuck open, which would explain the fuel being pushed back out of the carb.