I just finished a decarb treatment with seafoam and then ran the motor for a couple hours on the lake today. I’ve got more than usual black soot on the upper leg around the exhaust relief ports. Looks to be coming from under the powerhead though. Motor runs great. Idles good. WOT 5400 at 30 mph...
1981 Johnson 70 hp in good condition
500 hours (? 4th owner)
Saltwater use, but well cared for.
Blown head gasket last year on bottom cylinder with saltwater intrusion. I replaced the head gasket. Compression numbers of 120-120-105 afterwards. Ran it some since then and compression has dropped...
I have a Mercury 20 hp (Merc 20 1979) that was given to me in okay shape, but needed a lot of work. I have it running pretty well, but there’s a couple issues still. When I got the motor I noticed there was a ton of black sticky gunk in the lower pan which I thought was dried oil or grease...
This is going to be lengthy, sorry in advance, just trying to be thorough since I know I've tried a few things likely to be suggested.
I have a 1979 Mercury 20 hp (model 200) short shaft that needed work and did not have a prop when I acquired it. It also has a 1/2" of the skeg tip chipped off...
I have a 1951 Evinrude Fleetwin 7.5 hp 4443 that I found in storage. I've done quite a bit of work recently and got it running for the first time in 40 years. Compression is 90 psi upper and 88 psi lower. I have replaced the ignition coils, condensers, points (0.020", timing adjusted with timing...
