Home › Forum › Ask A Member › Late 50’s Johnson 18 hp compression? › Re: Late 50’s Johnson 18 hp compression?
May 18, 2018 at 9:41 pm
#76282
Yeah, looking to be a 1957 model. Sure looks like it has had a hard life indeed, especially on that stupid pontoon rig. I’m guessing you should see around 100PSI for compression. I would check/drain the gear lube also, look for water. Pontoon duty may have really messed up the clutch dog/forward gear as well….