Re: Low rpm cutout 1946 deluxe clipper

Posted by TxGoat On 2023/8/15 14:13:17

Old, stale fuel can cause problems.

Otherwise, the missing or lurching could be caused by a number of things.

If the engine is not getting enough fuel, you will often get a surging effect, perhaps with backfiring.

A more abrupt jerk or hesitation might more likley be a problem in the ignition system.

If the car runs well most of the time, it's probably not a serious issue.

Spark plugs that need attention can cause such problems, as can dirty or corroded ignition points.

Spark plug wires can cause problems if they are old, especially if they are gathered into a harness of some kind.

Sticking valves is another possibility, and it could be related to stale fuel.

If you're not certain that the fuel is fresh, draining the tank and putting in ten gallons or more of clean fresh fuel may be helpful. Always use due caution when handling gasoline. Work outside when handling gasoline.

If the oil on the dipstick is thick and dark, it would be a good idea to drain and replace it, preferabley when the engine is warmed up. A good quality 10W30 oil is suitable.