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Carb. adjustment Spec.s for Ferguson TO-30

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Lance Luedtke

08-19-2004 13:46:33

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Could anyone please help me out with the adjustment settings on the carburetor on my TO -30. For gas and air mixture.

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Fred OH

08-19-2004 17:04:34

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Re: Carb. adjustment Spec.s for Ferguson TO-30 in reply to Lance Luedtke, 08-19-2004 13:46:33

Set big and small screw to 1 1/2 turns from all the way in. Then I adjust the big screw (high speed metering jet) on out till when the throttle is pulled from idle to wide open throttle, the engine won't hesitate...or when the throttle is wide open...turn big screw in slowly till the engine starts to quit and then turn it back out about 1/2 or 3/4 turn.
The small screw or (idle air adjustment) is adjusted till the engine (while idling) is adjusted for the highest rpm. If the adjustments don't do anything when doing the above...the carburator probably needs rebuilt. Fred OH

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Ray,IN

08-19-2004 20:56:12

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Re: Carb. adjustment Spec.s for Ferguson TO-30 in reply to Fred OH, 08-19-2004 17:04:34

Fred, I'd like to add to your post if I may. Your first procedure is correct to a point. The power screw should be adjusted while the tractor is under load(plowing etc). The reason for this is Harry Ferguson designed the engine to use the fuel system for additional engine cooling. Failure to heed this is one reason why some complain of engine overheating while working the tractor hard.

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