Re: 1950 Speeditwin Carburetor Leaking Fuel

[viking66]

I took the Carb off last night and stripped it down to Parade Rest. I blew out every passage, looked at both the low and high speed needles and jets, both looked good. I also checked the Primer valve, it seals shut solid so no fuel coming from there.

The only thing I noticed was the Low speed assembly had 2 gaskets on it and both were not in the best of shape. I replaced them with a new fiber gasket I had. Could this be it…maybe?

I did not have a chance to start it back up last night because it was to late. Today is my day off so I will start it again this morning for a test.

As far as the Low speed jet adjustment goes it states in the Operating and General Instruction manual on page 6 says that it is 1 1/2 turns. I then looked at the instructions decal on top of the tank and it to says 1 1/2 turns out and then to adjust after the motor is warm and under running conditions.

I made myself a real nice test tank from an abandoned bin I found so I can have the prop on and run this motor under semi normal conditions and see better exactly what is going on. Having this tank also confirmed that I did not have the LU down far enough in the water for it to pump correctly. It does pump water quite well so that can be checked off of the list as working now.

I hope to report later today that I don’t have a gallon of fuel a minute spurting out of the throat…lol

Thanks all for the support. I do know these old beasts can be very finicky when we want them to wake from their many years of slumber.