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Farmall & IHC Tractors Discussion Forum
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Timing an M

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Wicksfield

03-20-2006 10:31:22




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I want to time my M with a timing light. At engine idle, please advise what is the proper timing.

Thanks in Advance.




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Wicksfield

03-21-2006 06:48:08




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 Re: Timing an M in reply to Wicksfield, 03-20-2006 10:31:22  
Thanks to all that have responded. I do have the distributor with points. As I recall, my crankshft pulley has notches with no degree marks. Which notch is which?



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Hermit

03-20-2006 16:25:37




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 Re: Timing an M in reply to Wicksfield, 03-20-2006 10:31:22  
With a distributor-points set at .020 and breaker arm spring tension at 21-25 ounces-degrees and rpm at crankshaft:

0 degrees at 400 rpm
19 degrees at 800 rpm
34 degrees at 1200 rpm
40 degrees at 1600 rpm

From IH-8



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the tractor vet

03-20-2006 19:44:47




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 Re: Timing an M in reply to Hermit, 03-20-2006 16:25:37  
That is one of the old settings now total is limited to 27 degrees



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Bob

03-20-2006 10:44:16




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 Re: Timing an M in reply to Wicksfield, 03-20-2006 10:31:22  
Mag or distributor?

With a mag, as long as it is running over a couple of hundred RPM, and the impulse has "kicked out", you will see "full running timing".

With a distributor, at idle, you will only see "initial timing" of perhaps 4 degrees BTDC, as the centrifugal advance doesn't advance until higher speeds.



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the tractor vet

03-20-2006 10:52:08




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 Re: Timing an M in reply to Bob, 03-20-2006 10:44:16  
Bob the advance starts to come in just above stock factory ideal so it is best to use a tach to get the ideal set first before playen with the curb timming , the best way is get total advance set at full throttel and not to worry about curb timming . Now IF the dist. is in good shap and been tested on a strobe you do not know just what it is doing as per spec. since mostof them were used tomuch when they where new. they are off sometimes a bunch. and some have been changed to the newer curve as it is a cut back setting as there was a update kit to make them lug better .

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