MF 10 ignition.

breimer · Nov 9, 2010

I wanna convert my MF10 to a battery powered coil ignition system using the existing breaker points but not the magneto.The magneto has become un reliable in cold weather. I think I'll need a different ignition switch, coil,etc. Can some one come up with a wiring diagram or instructions on how to wire this up? It does not seem difficult however I am not sure how to integrate this old style voltage regulator and starter/generator charging system. note it's a ten hp Tecumseh.

El Toro · Nov 9, 2010

You will need a new ignition switch with battery voltage run to your switch. You will need a wire from the switch to your coil to the + terminal on the coil. Your will need to use a volt meter to see which terminal has battery voltage when the switch is on. Run another wire from the - terminal on the coil to your points.
Disconnect the old feed wire to your points from the armature. If you have a 12 volt battery buy the coil from Napa with the built-in resistor. Hal
PS: Here's a wiring diagram for a Kohler with battery ignition. Your Tecumseh should be similar. Your starter/generator and regulator is wired separately and has nothing to do with the ignition other than keeping the battery charged.

breimer · Nov 9, 2010

Thanks for the diagram. Looks quite simple. The only thing is that I can no longer read the letters that mark the different terminals on my regulator. However it looks like I may not have to really change much there. Currently there are only two wires on my switch. One goes to the points, I believe the ignition switch grounds this out when I switch the tractor off. I am not sure how it achieves start with only one other wire unless it uses ground to complete the solenoid circuit. If thats true, (I could test that) I still need to know which terminal on the regulator to hook to because the new ignition switch will not work that way will it? Thanks for your help though. I may figure it out from the diagram.

El Toro · Nov 10, 2010

Your old switch is set up to ground out the points. You won't need that with battery ignition. Your new ignition switch will kill the battery voltage to the coil to stop the engine. Hal

Anonymous-0 · Nov 11, 2010

The ignition switch you need is the same as a John Deere 212 uses. Some of the older Wheel Horses with starter generator use this same switch.

I am using a NAPA IC64SB ignition coil on my cub cadet 108 and so far no problems.

I am thinking you also will need a different condenser in the ignition points circuit as well. I am using a condenser for the Kohler K241 on my 108.

breimer · Nov 14, 2010

Ok I got it all wired up and its working perfectly. Thanks guys for your help. I got a coil from a friend of mine, the only thing is I'm not sure if it has that internal resistor or not. It doesn't say anything on it. He doesn't remember where the coil comes from. Question is, is there a way to test weather or not the coil has an internal resistor? Or do I just run it and see if it gets hot? Found that the one on my Case 224 is not the correct one, someone had previously put the wrong one on it which probably explains the coil getting hot and shutting the tractor down. I got a new one from Kohler for a decent price so that one will go on the Case.

MF 10 ignition.

breimer

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El Toro

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breimer

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El Toro

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Anonymous-0

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breimer

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