Re: Do I have a vapor lock problem?

Posted by harrybar On 2013/7/20 15:28:05

I pumped all the gas out of the gas tank using the electric fuel pump. The gas was brownish. I then blew out the fuel line with an air compressor and put a new fuel filter near the carburetor. I put new fuel in and it started right up. I set the KD spark tester at 20Kv and got good spark. I let it idle and measured the temperature on the exhaust manifold and was surprised that it was near 500 degrees near the front. I advanced the timing and the temperature came down to 400 degrees at the hottest spot on the exhaust manifold, but most readings were nearer 300 degrees. The base of the carburetor is 160 degrees. I am now ready for a test tomoorrow in the afternoon heat.

I hope my problem was just old gas and retarded timing.