1964 Ford 4000 4 cyl gas surging problem

MARCORVET · Mar 19, 2018

I have a 64 Ford 4000 4 cylinder gas tractor that I am trying to repair. Can't set the timing correctly because the engine surges at idle. Haven't been able to locate the problem. Anby ideas?

Jerry/MT · Mar 19, 2018

The usual cause is the mixture is too lean and/or the timing is retarded.

MARCORVET · Mar 19, 2018

(quoted from post at 14:33:24 03/19/18) The usual cause is the mixture is too lean and/or the timing is retarded.

I'll check the fuel/air mix as soon as I can tow it from the shed to the shop. Can't set the timing till I can stop the surging.

alg · Mar 19, 2018

Check your governor settings.

Royse · Mar 19, 2018

Pull the choke out a bit and see if that helps the surging.

David G · Mar 20, 2018

I agree, if a little choke helps it is mixture issue, cheap and quick check.

Dollar Bill · Mar 21, 2018

Can't set the timing till I can stop the surging.

As others have posted, most surging problems are caused by a lean A/F mixture. The idle mixture screw is only effective from 450-800 RPM. The idle mix screw controls air so screwing it in fattens the mix whereas the power jet needle controls fuel delivery and turning it in leans the mixture. Disconnect the governor linkage to the carburetor and make your adjustment. If it still hunts then its time for a thorough carb cleaning.

MARCORVET · Mar 22, 2018

The carb has not been touched in years, engine was rebuilt a few years back. Ran good until last year. I think i'll pull the carb and rebuild it. Shooting for Friday or Saturday to get it to the shop.

1964 Ford 4000 4 cyl gas surging problem

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Jerry/MT

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alg

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Dollar Bill

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