I have recently given this outboard update on all ignition parts. I had a problem with a rough idle and rebuilt the carb and replaced the fuel pump which seemed to have worked for a brief while, but after sitting for a couple of months, I took it out and the problem has returned, perhaps worse. The engine idles rougher and rougher and eventually will not restart without sitting overnight. There is fuel buildup around the carb gasket with a some drips fallen down, wetting the motor housing.
I noted that I could get it to turn over for few moments with one pull after an hour or so, with the fuel line disconnected and choke off. Interesting...
I believe the problem is in the carburetor- note that the rebuild kit did come with a new float etc.. apparently something is clogging up somewhere- any ideas?
Could try to buy a new carb but seems they cannot be found for a motor so old.