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Ford 9N, 2N & 8N Discussion Forum
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O.T. Old Snapper REar engine rider

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Rob N VA

06-10-2004 06:10:36




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Sorry for the O.T. but this should be an easy one for some of you guys....just not for me. I have an old snapper Rear Engine Rider. From the serial number, it is a 1972 model with a pull start 8hp briggs. I got really tired of pulling that thing, so I mounted a battery, found an old starter and switched out the flywheel so as to have electric start. I also mounted a light. There are two wires that are comming off the generator coil. One wire is going to my light, the other wire is for keeping the battery up, But where does it go????? I assumed it would go to the positive side of the battery, but that makes big sparks and makes the wire a little toasty, so that ain't it. Could someone please explain this to me? I just can't see how it could go to the negative side. The system is 12 volts negative ground. Please help! Thank you very much and sorry for the OT...But if it helps, my 8N is running like a champ, just changed the tranny and rear gear fluid. VERY messy job!!-----Rob

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B.Jones

06-10-2004 17:35:42




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 Re: O.T. Old Snapper REar engine rider in reply to Rob N VA, 06-10-2004 06:10:36  
Ron, I think I can help you with this one. A diode is just a one way electrical valve. Go to Radio Shack and tell them you want a 5 amp diode. You could probably get by with a 3 amp. Hook one end of it to the battery hot side and check the other end of it with a test light and see if that end is hot also. Turn it around if necessary until the end away from the battery is DEAD. Hook the dead end to one of the two wires that you said sparked earlier. I have done this many times myself. The system puts out so little current that no voltage regulator is necessary. Use a digital volt meter and start the motor with a few rpm's to see if your voltage is going up. If it will read higher than before you started the motor then it is working. I also have 3 old snappers and they all charge this way. If this is not clear post back. Barrett Jones

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Steve from MO - a little

06-10-2004 08:28:53




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 Re: O.T. Old Snapper REar engine rider in reply to Rob N VA, 06-10-2004 06:10:36  
Can you get the rest of the parts from the engine and tractor you took the flywheel from? Rectifier, wiring, etc.

Failing that, could you look at one like you took the flywheel from and make notes about wiring and a list of part needed?



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gspig

06-10-2004 07:50:26




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 Re: O.T. Old Snapper REar engine rider in reply to Rob N VA, 06-10-2004 06:10:36  
Check out the post "AC or DC" in the garden tractor forum. Sounds like you have AC coming straight from the stator, you will need a rectifier (diode) to get DC for your battery.



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Jim Cox

06-10-2004 06:36:56




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 Re: O.T. Old Snapper REar engine rider in reply to Rob N VA, 06-10-2004 06:10:36  
You will need a seperate pigtail coming off a different winding, usually at the rear, for your stator. Add a rectifier and hook it to your battery. If your motor never had a stator winding, then you should keep an extension cord and a battery charger handy.

BTW, a 12HP Briggs on a 8HP snapper will pull the front wheels 10-12" and keep them up for about 6 or 7 feet ;^)

Hope to put a flamethrower on one someday. In the immortal words of 'Tim the Toolman Taylor' somebody had to do it

Good Luck

Jim Cox

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Rob N VA

06-10-2004 12:14:08




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 Re: Re: O.T. Old Snapper REar engine rider in reply to Jim Cox, 06-10-2004 06:36:56  
Regulator? Diode? You just went over my head. Tell it to me like I am a 2 year old, and I will eventually figure it out. I'll tell you what I have. There was a winding that went inside the flywheel (both salvage parts) the flywheel had strategically placed magnets for which purpose I assumed was just a regular generic genny. There were two wires comming off the internal windings. One I have hooked up to the light with neg ground, but I guess with lights that dosen't matter since they are constant load. The light works fine, and both wires are reading 12 volts. Thanks again for the help!!!----Rob

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Hobo,NC

06-10-2004 06:47:16




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 Re: Re: O.T. Old Snapper REar engine rider in reply to Jim Cox, 06-10-2004 06:36:56  
It'll clime a tree pettey good to with that big motor



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Jim Cox

06-10-2004 06:41:11




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 Re: Re: O.T. Old Snapper REar engine rider in reply to Jim Cox, 06-10-2004 06:36:56  
but maybe you could read the output to your lights and let me know what you find, AC or DC. Maybe we can rectify what you have. Sorry I didn't think of that when I posted earlier

Adult A.D.D. Strikes again

Jim Cox



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souNdguy

06-10-2004 06:50:34




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 Re: Re: Re: O.T. Old Snapper REar engine rider in reply to Jim Cox, 06-10-2004 06:41:11  
That's what I was thinking.. if it is kicking good voltage out.. he can drop a blocking diode in it and then regulate/filter it.. if the voltage is high enough.. when under load.

Soundguy



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souNdguy

06-10-2004 06:25:23




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 Re: O.T. Old Snapper REar engine rider in reply to Rob N VA, 06-10-2004 06:10:36  
Though I've seen one of those mowers way back when.. I don't know anything about there genny/magneto.

My furst guess would be to put a meter on it. And see what ya got.

How well does it run your 12v light?

Soundguy



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