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I have a 1966 912.....hard to start...have to keep pumping the gas to it......when I finally get it started and get the revs up it sounds semi right ....but if I let my foot off the gas it dies out......the temp guage never moves. Looked at the carb on the left as you are looking at the motor and it appears to be leaking gas......is it possible that the car is not running on all cylinders and that the gas has fouled out a plug or two and the car is only running on 2 or 3 cylinders? When in first gear and giving it gas...semi ok....put it into second and dies out......anybody got any ideas?

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You'll need to do a little diagnostics. Test the fuel pump pressure and volume. Remove the air filters, look down the carb throttle and operate the accellerator to see if they are discharging fuel. Any vacuum leaks?

With a vehicle of this age it's very common to find corroded fuel lines and tank. Has the fuel filter ever been replaced? A fuel leak of any type is serious let alone one on a air cooled engine. Never open the fuel system on a hot or even warm engine as the exhaust heat exchangers are famous for trapping raw fuel/oil and can ignite in a fraction of a second.

Have a fire suppressor at hand.

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  • 1 month later...

Agree, Stuck float. Pull the fuel level sender & have a look in the tank for rust. Use a mirror & flashlight & look @ the upper surfaces. Carbs need to be gone thru too. Stuck float will not be the only problem. Solex or Weber carbs???


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