Troytroy40
New member
I purchased an old game fisher 3.5 hp engine that had sat with little or no gas in it for a few months before I purchased it (so I was told)
My problem is that I pull the cord and it will only start with the choke off for a few seconds then stall. So I took the carb off and appart cleaned it and the fule lines got a new spark plug put some Premium gas in it with a small engine tune up additive and a additive for marine engines for the ethanol. Now I can start it with the choke and it runs for 30 seconds then dies. If I pull the cord when it starts to sputter it will keep it running for another 30 seconds. If I lower the trottle it dies if I increase it it dies quicker. It itles very rough. I can also keep it running by instead of pulling the cord when it is about to die turing the choke off. the engine fires up for a few seconds but will then die if I do not put the choke back on and then need to do it again in a few seconds.
I thought it was bad that was left in it so I ran it dry and no difference. I have standard 2 stroke outboard motor in it at a 40:1 ratio as the new oils only need 50:1 but back when this motor was made it recomended 32:1. This is an old motor with No fule pump. I have tried just running the good gas with additives through it but after around 30 min of run time it still is not improving. I noticed the spark plug gets black build up on it after only a short use. could that mean anything?
Any advice would be great
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