The Ford Barn

pjdeb · 12-15-2023, 12:37 PM

I have 023" end play in the crank as measured between the end of the block and the crank flange. What is this going to do to the operation of the magneto?

I was undecided about putting in a new magneto or running off battery.

Thanks in advance for comments. It is a 1923 coupe.

Dan McEachern · 12-15-2023, 01:06 PM

Consider taking the cap to a rebabbitting shop and have them build up the thrust surface and remachine it to give you .003-.004" endplay. You don't need a replacement cap, just build up the thrust. Your mag will not run very well with that much end play.

Kurt in NJ · 12-20-2023, 03:53 PM

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I have that much end play, had a magneto that only made 3 volts, did the on car recharge process with 3 12V batteries and heavy wire, now have 9 volts hand cranking, easy hand crank starting on magneto.
there was a big thunk as the power was applied as it shifted the crankshaft

12-15-2023, 12:37 PM	#1
pjdeb Senior Member Join Date: Sep 2019 Location: The Villages, FL Posts: 103	Crank end play I have 023" end play in the crank as measured between the end of the block and the crank flange. What is this going to do to the operation of the magneto? I was undecided about putting in a new magneto or running off battery. Thanks in advance for comments. It is a 1923 coupe.

12-15-2023, 01:06 PM	#2
Dan McEachern Senior Member Join Date: Aug 2010 Location: SF Bay Area Posts: 193	Re: Crank end play Consider taking the cap to a rebabbitting shop and have them build up the thrust surface and remachine it to give you .003-.004" endplay. You don't need a replacement cap, just build up the thrust. Your mag will not run very well with that much end play.

12-20-2023, 03:53 PM	#3
Kurt in NJ Senior Member Join Date: May 2010 Location: on the Littlefield Posts: 6,159	Re: Crank end play Sponsored Links (Register now to hide all advertisements) I have that much end play, had a magneto that only made 3 volts, did the on car recharge process with 3 12V batteries and heavy wire, now have 9 volts hand cranking, easy hand crank starting on magneto. there was a big thunk as the power was applied as it shifted the crankshaft