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Minneapolis Moline Tractors Discussion Forum

M5 gas

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09-09-2020 16:48:36

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Tractor starts fine and runs well although it wonít idle down like I think it should. After 10 min at idle it acts like it is starved for fuel and dies. Some times chocking will let it recover but not always. I rigged up a separate fuel tank to eliminate fuel tank issues but it does the same. Carb has been rebuilt.
What do I try next? Coil?


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09-11-2020 09:06:25

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 Re: M5 gas in reply to pointrow, 09-09-2020 16:48:36  
I don't know what you set the float at. But don't go by the paper in the kit. MM spec 5/16" between float and housing upside down without gasket.



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09-11-2020 06:24:52

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 Re: M5 gas in reply to pointrow, 09-09-2020 16:48:36  
Put a rubber hose on a propane torch. Start the tractor and stick the hose up in where each port on the intake manifold bolts to the head with the propane turned on and see if it revs up on its own. If it's sucking air, the propane will make it rev.

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09-10-2020 07:47:33

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 Re: M5 gas in reply to pointrow, 09-09-2020 16:48:36  
Ignition problems can give similar symptoms.

Check points, point gap, timing, switch connection wiring etc.

Check for crud in fuel tank that could be blocking output,

When it bogs down and quits check for fuel flow from bottom of carb and check for spark. That should tell which direction to go

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09-10-2020 06:19:39

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 Re: M5 gas in reply to pointrow, 09-09-2020 16:48:36  
Is there a chance it's sucking air between the carb and intake or the intake and head?

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09-09-2020 21:18:08

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 Re: M5 gas in reply to pointrow, 09-09-2020 16:48:36  
It wouldn't hurt to check that. Often times a coil will work good cold, then act up after it gets warmed up. I had one do that once.

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09-10-2020 17:20:57

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 Re: M5 gas in reply to Rich'sToys, 09-09-2020 21:18:08  
Swapped coil no change.
I put new needle and seat and set float again. Noticed the tag on carb says tsx 95. Canít seem to find any reference for that carb. Starting to think it has the wrong carb on it.

Now tractor idles down real nice but wants to run with 1/2 choke. No amount of adjusting will let me back off the choke.
This tractor is driving me crazy.
I have a friend who Who is going to let me try a carb off of a 5 star. Will see if it will run.


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09-11-2020 12:16:43

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 Re: M5 gas in reply to pointrow, 09-10-2020 17:20:57  
Carb number 3 digits. TSX 951?

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