i believe this motor needs a little work it starts hard after hot and it is putting oil on the plate just above the carb. i have noticed that one of the spark plugs is getting carbon/buildup on it causing it to foul out. could it be that this thing needs rings or possibly valve quide seal it runs fine once started and it does not smoke. but before i purchase a new motor would some advice. also if this turns out to be the best bet $$ who has the best prices for a replacement motor for this machine?