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Farmall & IHC Tractors Discussion Forum
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Farmall M shooting raincap at me

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John Fox

08-03-2003 08:03:42




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I recently tried starting my 50 M and a noise like a gunshot went off and blew my raincap across the yard. Does anyone think it is just the carb needing rebuilt, or something I fear worse?
Thanks for all responses




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atw

08-06-2003 09:46:13




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 Re: Farmall M shooting raincap at me in reply to John Fox, 08-03-2003 08:03:42  
John,
This is kinda late, but I just read your post.
A friends father just had the exact same problem with his '43 M. We were at a local tractor pull this past June and the M would run fine, then all of a sudden start to break up and die. Cranked the livin daylights out of it and BANG out the muffler and off with the rain cap (thank god it didn't hit anyone in the head because we had no idea it came off until it hit the ground a few feet away!). We found out by chance a week or so later that it was the reproduction IH push-pull ignition switch that was the problem. The machine was doing the same thing again, and someone put their hand on the switch and wiggled it a bit. The machine smoothed right out. Wiggle the switch a bit more and it would break up again. Installed a new NOS IH switch bought through the classified on this site, and the M runs great now. Check your electrical system to make sure nothing is intermittently cutting your power to the coil causing the problem.
ATW.

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Tim Kincaid

08-04-2003 00:27:55




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 Re: Farmall M shooting raincap at me in reply to John Fox, 08-03-2003 08:03:42  
John, Give us some more info. Had you been running it recently? Had you did some work to it before you started it? Let us know.. Tim K. ps. don't assume the worst that gets expensive. Patience is free.



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John Fox

08-04-2003 04:41:53




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 Re: Re: Farmall M shooting raincap at me in reply to Tim Kincaid, 08-04-2003 00:27:55  
Tim I had someone helping me and they put the plug wires on out of sequence, thanks to Hugh McKay there, I figured it out after getting his posting. Now the old girl has needed a rebuild on the carb probably since 1950 and I guess what better time than the present? Also need a new manifold too, I guess "Crazy Red" (named after my dear, departed Mother) at 53 deserves a good gift from someone, she had been rode hard for years in the Maine hills but somehow still escaped without a dent. I thank you all for your replies.

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Hugh MacKay

08-03-2003 18:39:01




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 Re: Farmall M shooting raincap at me in reply to John Fox, 08-03-2003 08:03:42  
John: When I was farming I had a 70 series Chevy truck with 427 gas engine. When this engine was hot and if you happen to shut it down a bit to quick you would hear in in the next county. The truck was also a Single axle highway tractor and in fall I used to rent an aluminium dump trailer for hauling grain.

One night I was coming home empty from a delivery. I was keeping my eye open for a convenience store. As I came over this hill, low a store, I stepped on brakes only to have one of the trailer air brakes lock up on the bare pavement. This plus pulling up on gravel, brought most of customers out of store. I shut the Chevy down quite quickly, jumped out and was about 10 feet from truck when BANG, the old Chevy shot flames 4 feet out her dual exhaust. One of the ladies on the step of the convenience store screamed," he's got a gun." I was directly in line from the people on step and the flame. Most of the people saw the humour and had a good laugh, even the store owners wife. When I paid for my purchase, she laughed and said, "you livened the place up." Her husband was not so amused, and mumbled something about the @#$%^&* idiots allowed on the road. Man, could that old Chevy ever make a backfire.

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Haas

08-03-2003 14:17:04




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 Re: Farmall M shooting raincap at me in reply to John Fox, 08-03-2003 08:03:42  
As the others said, something is wrong in the timing. If you have a magneto, it may be 180 degrees out of time. When that happens it will blow back through the intake system and blow the oil (and other things) out of the air cleaner. I you have battery igntion, check the wires to make sure they are correct when No. 1 cylinder is at TDC of the compression stroke.



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mike-nm

08-03-2003 10:17:59




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 Re: Farmall M shooting raincap at me in reply to John Fox, 08-03-2003 08:03:42  
sounds like your spark plug wires are on the mag.backwards, at least thats what happened to me with a super M I had- sound like a gun shot and the rain cap blew to pieces. Had to check my drawer's !!



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Hugh MacKay

08-03-2003 10:15:14




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 Re: Farmall M shooting raincap at me in reply to John Fox, 08-03-2003 08:03:42  
John: Sounds like the old M is a wee bit off on timing advance. They have been known to destroy ripe muflers.



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