1954 5 1/2 hp

[Trekspyder]

I have to pump the primer button on the 2 line tank to keep the motor running at high speed. So I put all new gaskets on the gas tank and still have the same problem. But it idles ok. Anyone have any ideas?

Thank you,
Rich

 

[robot]

Re: 1954 5 1/2 hp

try replacing all of the fuel/air lines. they get old. they leak air

 

[F_R]

Re: 1954 5 1/2 hp

Disconnect the air hose at the tank and put you finger over the end of the hose with the motor running. Should be slight pressure (+/- 4psi). If you have pressure there and no pressure build-up in the tank, there is a leak in the tank that you missed. Slop a bunch of soapy water all over the tank to find it. If no pressure at the hose, retry the same thing , disconnecting the hose that comes from the intake manifold at the fuel connector. If none there, the check valves are bad in the motor's intake manifold. I hear alcohol in todays gas is messing them up. Oops, forgot to suggest a bad o-ring in the fuel connector.

 

[rwise]

Re: 1954 5 1/2 hp

after its ran is there presure in the tank? when you did the gaskits on the tank did you replace the one in the cap? Is the fuel filter clean?

 

[Trekspyder]

Re: 1954 5 1/2 hp

There is pressure in the tank when it's run; it hisses a whole bunch when unscrewing the cap.

The gasket kit did not come with a cap gasket. I"ll look into that.

Thank you for all the help guys. I will try all of these suggestions on my next days off.

Rich