9.5 Johnson has a miss at high speeds...

dfrants

Chief Petty Officer
Joined
Jul 26, 2008
Messages
405
Found a 1967 9.5 Johnson. She starts right up so easy, half a pull, even when cold. Idles down really slow and smooth, but has a "miss" at WOT. Not every time, I've run from the landing across the lake without it "missing" a couple times, then the next time it will "miss" and slow down then speed up. Pulled the carb and cleaned it out. Pulled the flywheel off, looks like the previous owner had two new OMC coils installed. replaced the spark plugs. Still has the occasional miss.
 

racerone

Supreme Mariner
Joined
Dec 28, 2013
Messages
39,461
Replaced the plug wires ?------They are known to crack where they take the sharp bend coming down.
 
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