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Hey all, I need some help. I have a 1960 40hp evinrude and when i have it at full throttle it seems like it is only running about 1/3 speed or power. Any thoughts? Thanks for your help!
Sounds like you're running on one cylinder. Do a spark test with a good tester. Or remove the plug wires one by one when it is running. If running on only 1 cylinder then 1 wire will do nothing and the other will kill the engine.
Im Having the same problem with my 1996 48 Johnson. So if u pull off one plug and nothing happens and then u put it back on and then pull the second plug and it dies that means its running on one cylinder?
