Home › Forum › Ask A Member › 65 Sportwin surging at high speed › Re: 65 Sportwin surging at high speed
WILLG, a while back I trying to help a guy get his 1966 Evinrude 18hp running because it idle fine and run decent until about mid range. It would bog down and run like it was running too rich.
Just like you, he cleaned the carburetor spotless and everything set just right. Ignition was all new and had hood spark on both cylinders. Compression was good.
Come to find out it was a bad fixed high speed jet. You never know what others have done before you. Pappy, made a interesting comment that they were seeing some bad jets over the past couple of years that he suspects due sulfur compounds in the fuel causing damage to the brass jets.
After the jet was replaced all was good.
Just a what if. HOPE you get it resolved soon.
David T.