i HAVE AN 1966 jOHNSON 33HP THAT HAS 107 compression in both cylinders.It was recomended that i replace the head gasket,when i removed the head the piston has side movement ,should i be concerned about this. The pistons for this motor are discontinued and the only ones available are in the...
I was reading some of the answers for problems with this motor and one of the replies was to disable compression relief befoe doing a compression test. Were is this valve located and how do you disable it. thanks Mouldmaker