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MF50 nof fire

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Joined: 08 Aug 1999
Posts: 184

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PostPosted: Sat Jun 23, 2018 10:51 am    Post subject: MF50 nof fire Reply to specific post Reply with quote

We have an MF50 gas and recently when I went to start if there was no spark at the distributor. Replaced the points, condenser, and finally the coil. Still nothing. Engine turns over fine just no fire. Can anyone give me a step by step procedure to locate the problem. Seems I have forgotten about everything I knew about on older engines. I remember measuring the voltage to the coil using a voltage meter just not which lug on the coil to measure to. Usually I can keep this old baby running but right now I am truly stumped. Thanks guys as always.
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Joined: 12 Mar 2000
Posts: 78454
Location: Lake of the Ozarks area of MO

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PostPosted: Sat Jun 23, 2018 2:18 pm    Post subject: Re: MF50 nof fire Reply to specific post Reply with quote

ALWAYS trouble hoot before parts or you will add to the problem not fix it.

So here are a few things to try. Pull the distributor cap off rotor and dust cover if it has one. Next remove the ignition side wire off of the coil. Turn on the ignition. With the points close touch that wire back to the coil where it came off. You should see a spark when you do that. Next turn the engine over to the point the points are open. Do the same test. If you get spark both times then you have a short some place in the distributor. If you do not get a spark either time then the points need to be cleaned or you have no power getting to the coil by way of the ignition system. Another way to do a test is run a jumper wire from the ignition side of the battery to the ignition side of the coil leave the switch off. Touch it to the coil. When you do you should get a spark. If you get the spark try to start it with it hook o the coil. If it starts you know where to look for the problem as in the switch or wires from the switch
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Joined: 02 Dec 2009
Posts: 2543

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PostPosted: Sat Jun 23, 2018 5:42 pm    Post subject: Re: MF50 nof fire Reply to specific post Reply with quote

Take small (16 gauge) wire from positive side battery and run it to + (battery) side coil. This is just hot wiring it. It will start in gear so be CAREFUL. If it starts then it's in your wiring--key switch since you replaced everything. Set your points on 25.
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