Honda 9.9 fouled plug

[cabelaman5104]

This '98 engine has been my workhorse for trolling. This past trip it began vibrating at idle. I decided to replace the plugs and I noticed that that one of the plugs as severly fouled with oil fouling at the tip and you can see oil around the treads.<br />Is this the beginning of a major repair????<br />Should I be looking at a valve seal issue or an oil ring issue?

 

[papasage]

Re: Honda 9.9 fouled plug

is this a 2 stroke or 4 stroke . 2 stroke doesnot have valves or oil rings . prolong idling will cause this . you need to run wot some to clean it out . or git a 4 stroke .

 

[blazed4x4]

Re: Honda 9.9 fouled plug

Did this motor just come out of storage? Ive seen cases where small hondas are stored in improper positions, oil leaks into a cylinder and on first fire up, itll foul a plug. Do a compression test first, just to be sure. Toss another set of plugs in there and run it. See if it fouls again.

 

[cabelaman5104]

Re: Honda 9.9 fouled plug

No, my boat is stored in my garage and the 9.9 honda kicker kept on the boat in a vertical position.<br />I changed the plugs and I'm planning on fishing this weekend. Hopefully the new plugs will make a difference. Thanks for your input. It's appreciated very much.