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Farmall & IHC Tractors Discussion Forum
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F4 Mag

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James Williams

01-03-2004 19:17:10




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When i go to start my F12 the mag only clicks every now and then.when it starts It works great.This problem has just started.I have not oiled the mag,do you think it might be sticking.




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Bill Smith

01-04-2004 12:22:46




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 Re: F4 Mag in reply to James Williams, 01-03-2004 19:17:10  
The impulse should only click at low RPM's (while hand cranking). Should quit clicking once it reaches normal running RPM's. It is imporatant that it functions properly. If it don't click while hand cranking the engine is more likely to kick back (fire backwards) while hand cranking. You might be able to free it up by lubing it with proper lube. Otherwise, it is gumbed up pretty bad and will likely need taken apart and cleaned up as well.

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Dave@NY

01-04-2004 06:44:32




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 Re: F4 Mag in reply to James Williams, 01-03-2004 19:17:10  
Try some penetrating type of oil[WD-40,Liquid Wrench,etc.]on the impulse to see if it will free up.I had made the bad mistake of oiling the impulse of mine with 10-30wt. Finally stuck up the pawl so it just kept going click-click after the engine fired.Have used 3 in 1 oil on it after geting it cleaned out,so far OK.



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F-man

01-03-2004 20:30:51




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 Re: F4 Mag in reply to James Williams, 01-03-2004 19:17:10  
Your impulse pawls may be sticking. The last mag I had apart was all gummed-up inside. It took some scrubbing and a lot of WD-40 to free everything up. You need to use light oil for your mag. 10 weight oil is a bit too thick. Be careful not to over-oil the oil hole by the spark advance cover. This can lead to intermittent ignition failure because it can short out the points carriage to the mag housing.

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