Post by puzzler46 on Oct 1, 2008 7:48:42 GMT -5
I purchased an mc54b-250 took it to a motorcycle dealer to have the oil changed and the guy put in 20-50 oil. It was summer and he stated he always puts that in all his equipment. From about 3 weeks and then on I had a hesitation problem and the engine would quit. The guy actually burned the fuel pump up - the oil's to heavy. After having a new pump put in the cycle runs like a champ. I don't believe I ever had any sort of vapor lock after reading that the heavier oil ruins your fuel pump.