Home › Forum › Ask A Member › 1961 Johnson JW won’t run › Re: 1962 Johnson JW won’t run
Well, sounds like your spark is OK. Perhaps there is a restriction in the fuel system/carb causing the engine to be hard to start and only run for a few seconds. On the other hand, perhaps the engine is flooding causing the fuss, you might try running it with the air box off.
70PSI is a fairly normal compression reading for that engine, 60PSI might be a little low. But again, these engines have small combustion chambers, so compression gage accuracy should always be questioned as well. You could always try soaking in engine tuner/seafoam if you want to hold off on pulling the head/exhaust cover. Sounds like your cylinder walls look OK, but your rings could be stuck.