1995 Mercury Force 70 (2 stroke) - won't idle, surges at times

Joined
May 19, 2011
Messages
8
I took out my used boat over the weekend. It had a hard time starting. When I finally did get it started, it would stop if I put it in Neutral. The idle seemed a little rough. When I was driving the boat, the engine feels like it is surging at about 1/2 throttle.

When I got home, I opened the cowl and checked the spark plugs. The top plug was light brown (chocolate milk) and the bottom two were very dark, milky. The plugs itself looks like they were recently replaced by the previous owner.

Any suggestions on what needs to be done?
 

Faztbullet

Supreme Mariner
Joined
Mar 2, 2008
Messages
15,931
Re: 1995 Mercury Force 70 (2 stroke) - won't idle, surges at times

Compression test first, ignition test second, fuel system test/inspection third.
 
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