1964 Johnson 75 hp electra shift surging problem

807johno

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Joined
May 15, 2011
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4
I checked all the fuel pump parts and they seem fine. I also adjusted the low speed jets and for the most part it idles alot better as well. When ever I'm driving it though, sometimes it runs awesome, and other times it is really sluggish of the start and the motor surges allot. When this is happening even when it is up to speed it seems like there is a bit of hesitation, and sometimes there will be significant power changes almost as if someone is moving the throttle back and forth when im not touching it. Just this evening when i was putting it back on the trailer it was idling kinda rough, and then, when it was still in neutral all of a sudden it would rev up pretty high and then die. After that it was working fine again. The whole thing seems pretty random, some time it runs awesome and sometimes it doesn't with out changing anything. I'm pretty sure it is a fuel problem of some sorts, and advice would be greatly appreciated.
 
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