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Hi I have a 1983 Johnson 15hp that only has 10 PSI in both cylinders yet still runs. I did not think this was possible. PSI tested with multiple testers. No outward signs of head gasket failure. Does not smoke excessively. It can be hard to start but then seems to run pretty good. Any ideas what...

1983 Johnson 15 hp just dies after about 1 hour of trolling and will not re-start? Motor seems to be running perfect at all speeds. New plugs, good gas but this has happened twice now. Motor will re-start after sitting for awhile like nothing ever happened. Any thoughts greatly appreciated!

Any thoughts? Motor ran great 6 months ago. Will start and run for a while with the choke on but closing it kills the motor most, but not every time. It stays running at idle for as little as 20 seconds and as long as 15 min then putters out like it is starving for air or gas. New gas, new...

Hello, My dad got this boat from his neighbor many years ago for super cheep. It's a 1981, 12 foot Mirrocraft "Resort" model with a 1983 Johnson 15. Not very pretty but it didn't leak a drop, and the motor runs like a top. Over the years this little boat has caught a lot of fish and has never...