1975 70 hp johnson no wot

L

ltforever

Cadet
Joined
Jul 2, 2013
Messages
8
I have been working on this thing now awhile watched linkage move and it opens up all the way butterflies open all the way but only get about 7 mph out of it. On dry land it will rev right up but not on water.
 
B

boobie

Supreme Mariner
Joined
Nov 5, 2009
Messages
20,826
Re: 1975 70 hp johnson no wot

What's the compression on it ?? Will the spark jump a 7/16 " open air gap on a spark tester ?? Is it running on all 3 cylinders ??
 
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