oil on spark plug

[Brento311]

I just looked at my 1972 Evinrude 9.5, and noticed that there was some oil around the lower spark plug. I turned it with my hand, and noticed that the plug was loose. When I unscrewed it, I noticed that there was oil all on it, and on the threads. I forgot to run all of the gas out of it yesterday after I took it out, but I am not sure if that has anything to do with it. I did notice that when I ran it, the motor was missing and bogging down occassionally. I am running it on 50:1 with high quality oil. Can anyone help me?

 

[dmessy]

Re: oil on spark plug

Sounds like the plug was loose and you were getting blowby from loss of compression which explains why it was running poorly.<br />Clean or replace the plug and tourque it down to factory specs. That should solve your problem.<br />Ps- check the other plugs torque while you'er at it., good luck

 

[Brento311]

Re: oil on spark plug

Thanks a lot, I bet that's what it was. Does anyone know what the gap setting should be for my motor?