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H, Keeps cutting out

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WiJay
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PostPosted: Mon Nov 25, 2019 7:44 am    Post subject: H, Keeps cutting out Reply to specific post Reply with quote

I have a IH (H) my plow tractor, Was running fine then just quit.
Came back an hour later started right up, ran for 20 minutes then just died. I checked the spark from the Magneto and it was very weak. I replaced the points and rotor still weak?
Any suggestions?
 
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khouse6
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PostPosted: Mon Nov 25, 2019 7:56 am    Post subject: Re: H, Keeps cutting out Reply to specific post Reply with quote

sounds like a weak coil
 
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old
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PostPosted: Mon Nov 25, 2019 7:57 am    Post subject: Re: H, Keeps cutting out Reply to specific post Reply with quote

Coil is likely to be going bad and yes a mag has a coil
 
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DeltaRed
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PostPosted: Mon Nov 25, 2019 8:52 am    Post subject: Re: H, Keeps cutting out Reply to specific post Reply with quote

Feel the coil immediately after it quits. It will most likely be very hot.As it gets hot it develops an 'open' in the winding. after it cools the open closes and it will run till it gets hot again.A newcoil will cure your problem.
 
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teddy52food
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PostPosted: Mon Nov 25, 2019 10:53 am    Post subject: Re: H, Keeps cutting out Reply to specific post Reply with quote

Condenser can do that too.
 
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Dennis P
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PostPosted: Tue Nov 26, 2019 6:35 am    Post subject: Re: H, Keeps cutting out Reply to specific post Reply with quote

Probably coil, gas cap may not be venting properly.
Next time it dies, remove gas cap and see if that
helps.
 
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WiJay
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PostPosted: Tue Nov 26, 2019 1:38 pm    Post subject: Re: H, Keeps cutting out Reply to specific post Reply with quote

Just picked up a new condense, (New to Magnetos) how do I replace it, do I need to take the magneto off? Is there any where I can get instructions?
Thanks
 
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WiJay
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PostPosted: Tue Nov 26, 2019 1:41 pm    Post subject: Re: H, Keeps cutting out Reply to specific post Reply with quote

Is the Magneto Coil the same as Magneto Winding ? Sorry guys New to Magnetos..
The Magneto is a H4

Magneto Winding for F4 or H4 - Coil Winding for F4 magneto and H4 magneto; molded, hi-output. 2 inch wide, 3/4 inch hole, 2-3/16 inch outside diameter. Can replace 47439DA. Magneto Winding for F4 and H4 Magnetos used on: F12, F14, F20, F30, H, MD, WD6, W9, WD9
 
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WiJay
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PostPosted: Tue Nov 26, 2019 1:44 pm    Post subject: Re: H, Keeps cutting out Reply to specific post Reply with quote

It will not start now, placed a spark tester light from magneto cover to the distributor cap..the light is very weak.
 
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WiJay
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PostPosted: Tue Nov 26, 2019 1:46 pm    Post subject: Re: H, Keeps cutting out Reply to specific post Reply with quote

Magneto winding the same as coil winding or coil?

Magneto Winding for F4 or H4 - Coil Winding for F4 magneto and H4 magneto; molded, hi-output. 2 inch wide, 3/4 inch hole, 2-3/16 inch outside diameter. Can replace 47439DA. Magneto Winding for F4 and H4 Magnetos used on: F12, F14, F20, F30, H, MD, WD6, W9, WD9

Thanks Jay
 
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old
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PostPosted: Tue Nov 26, 2019 3:34 pm    Post subject: Re: H, Keeps cutting out Reply to specific post Reply with quote

A mag takes a special coil made to fit just that mag and no other mag. This site is likely to list them
 
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teddy52food
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PostPosted: Tue Nov 26, 2019 7:00 pm    Post subject: Re: H, Keeps cutting out Reply to specific post Reply with quote

Take the mag off as the condenser goes out the side towards the engine. Watch where the rotor is pointing so you get it on in time again. I center punch the flange & casting where it bolts up to so it will be timed as before.
 
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old
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PostPosted: Tue Nov 26, 2019 7:35 pm    Post subject: Re: H, Keeps cutting out Reply to specific post Reply with quote

Ah but condensers almost never go bad but many new ones and bad right out of the box
 
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560Dennis
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PostPosted: Tue Nov 26, 2019 7:40 pm    Post subject: Re: H, Keeps cutting out Reply to specific post Reply with quote

Have a Farmall C that did that. Found after a season of tillage frustration, it was a piece of the Erie times funny paper. It would get suck int the fuel ⛽️
port and block it , Then released it self and start over .
Don?t think that?s your problem ,but never rule any like this out, so open the drain on the carburetor And look 👀
 
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teddy52food
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PostPosted: Wed Nov 27, 2019 7:12 am    Post subject: Re: H, Keeps cutting out Reply to specific post Reply with quote

That is why I use my tester on every one I use. I have found bad ones that way right out of the box.
 
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