Re: 1965 Evinrude Lightwin – Speed Question

[Don]

I was jumping the gun too, I think Frank is right, only running on one cylinder. Possible bad plug or ignition.
Next, I would have a look at the throttle cam. Sometimes the carb linkage gets stuck and just bends the cam back when you try to advance the throttle.
And yeah, don’t try to remove the high speed jet without the correct tool: OMC 317002, you will mess up the jet and the bowl. But, I’m thinking the engine would have just faltered and stalled out if it was too lean. But, I guess someone could have messed with the jet or replaced it with a larger one causing it to run too rich.
Finally, sure looks like someone has jammed the wrong low speed needle in the carb, but that shouldn’t really affect the high speed too much.
And yes, you can usually sneak the tank out of the bracket with the fuel valve still in place.