Home › Forum › Ask A Member › ’57 Evinrude Sportwin Ignition Question › Re: ’57 Evinrude Sportwin Ignition Question
Did the engine ever run OK at high speeds after working on the carb? Perhaps the carb nozzle gasket is missing/damaged which allows fuel to bypass the high speed circuit and run way to rich at high speeds.
Do the simple things first though. I know you just got through going through that ignition system, but that does not guarantee it is working properly. Try using those inline neon spark testers, then run the engine when the sun goes down to monitor ignition while the engine is acting up.
But, I guess I am putting the cart before the horse here, how about the spark plugs? Just cuz they might be new, does not mean they are any good.