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mf 12 overheating?


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#1 collinmf12 OFFLINE  

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Posted April 19, 2016 - 06:27 PM

hey guys, last saturday I was at a local plow day with my 1975 mf 12 gear shift. 12 hp tecumseh. I plowed with it for 15-20 mins and it shuts off. wait about 20 min and it will fire up again. I thought it was an overheating issue but just wanted to get your guys opinion.

 

      thanks,  

          Collin



#2 propane1 ONLINE  

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Posted April 19, 2016 - 06:35 PM

Did it sputter, stumble, miss, backfire, hesitate, labour or any thing like that before it quit ?? Or did it quit like you shut the key off ??

Noel
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#3 JD DANNELS OFFLINE  

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Posted April 19, 2016 - 07:15 PM

Sounds like ignition or wiring. They can be tough to track down. Something is breaking contqct when hot then making contact when cold.


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#4 ckjakline OFFLINE  

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Posted April 19, 2016 - 07:29 PM

Collin did you ever have shroud off your engine. Start with simple stuff check for mouse nest in shroud, or maybe broken cooling fins on head or flywheel
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#5 EricFromPa OFFLINE  

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Posted April 19, 2016 - 07:29 PM

Could be vapor locking in the fuel line or in the carb.Do you have an exhaust leak under the hood or your fuel line close to the jugg or the exhaust?

 

Just had a tractor here today that was boiling fuel in the line.Fuel line was actually touching the cooling fins on the jugg.Pulled the cap off of the tank and you could see it bubbling up out of the hose.I ran new fuel lines on this one because it was dry rotted a bit and was to short to run where it needed to go.


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#6 Tecumseh power ONLINE  

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Posted April 19, 2016 - 08:21 PM

Unplug the 3 wire plug on that blower housing that will disconnect the motor from the tractor wiring. See if it stays running then. If it keeps shutting off pull check the spark as soon as it does. Don't crank it with out a grounded plug in the wire you will ruin the solid state
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#7 collinmf12 OFFLINE  

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Posted April 19, 2016 - 08:32 PM

thanks everyone appreciate it.



#8 HALFSCALE ONLINE  

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Posted April 20, 2016 - 02:50 AM

Hope it isn't too serious, I know I saw smoke rolling out of the blower shield when it stopped.

Had fun meeting you and plowing on Saturday.


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#9 James Bosma OFFLINE  

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Posted April 20, 2016 - 06:14 AM

It could be the coil went bad. Have seen engines act up when coil gets hot


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#10 collinmf12 OFFLINE  

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Posted April 20, 2016 - 04:27 PM

Hope it isn't too serious, I know I saw smoke rolling out of the blower shield when it stopped.

Had fun meeting you and plowing on Saturday.

yep it was nice meeting you to.



#11 DH1 OFFLINE  

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Posted April 20, 2016 - 04:39 PM

Hope it isn't too serious, I know I saw smoke rolling out of the blower shield when it stopped.

Had fun meeting you and plowing on Saturday.

 

If you got smoke coming out the blower housing then you must have a build up of grass or a mouse nest in there, I'd check and see.


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#12 ckjakline OFFLINE  

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Posted April 20, 2016 - 05:28 PM

Collin did you ever have shroud off your engine. Start with simple stuff check for mouse nest in shroud, or maybe broken cooling fins on head or flywheel

Also clean all the fins on the exterior of the cylinder under the other wrap around shield to the side of engine


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#13 collinmf12 OFFLINE  

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Posted April 21, 2016 - 05:55 AM

Also clean all the fins on the exterior of the cylinder under the other wrap around shield to the side of engine

ok yeah i cleaned the fins last night . No mouse nest. Im going to put a different coil on and see if that works


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