'96 Merc 25 doesn't idle.

Alex from GA

Cadet
Joined
Oct 31, 2011
Messages
14
It's a manual start tiller controlled 2 stroke. I've been working on this engine for over a year. It's been to 3 shops to no avail. Last year I took it apart and found scored pistons and walls when it first started fouling plugs and not idleing. I had it bored and installed new pistons, gaskets and seals. Ran it on double oil for the first tank of gas. I've rebuilt the carburetor several times with new kits. I bought a used carburetor and rebuilt it thinking there was a porus casting or something. The last shop I brought it to put on the advance linkage from another engine as mine didn't have one. The timing wasn't adjustable. Does anyone know the timing at idle and at high RPM? Today was the first day it didn't rain for a while so I worked on it. It'll run at mid and high RPM but when I try to idle it down it seems to fart every once in a while then when I get it down low enough to shift it'll die. The bottom plug is much darker and wetter than the upper one. Can anyone help. Thanks, Alex
 

carholme

Rear Admiral
Joined
Sep 4, 2010
Messages
4,845
Re: '96 Merc 25 doesn't idle.

Do you have a manual for the engine? If not, post your s/n and if you send me a PM with an email address, I will send you a copy.

Gerry
 
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