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Electrical problem

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BOB061

03-19-2005 06:47:51

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This may get long. Last fall I bought my 51 8N with side distributor knowing nothing. After working it a while I found I had to constantly adjust the points because the shaft was so sloppy. Being what I like to call thrifty I converted to electronic ignition, still a 6 volt system, because it was cheaper than a new dist. Worked fine with warm weather but would not start in the cold with out a charger-cranked fine, battery volts just dropped to low to get spark while cranking. Now I have the idea of adding a small aux. battery such as out of a childs electric riding toy. This would be done with a relay to isolate the aux. battery to just the ignition system when the starter is engaged and the back to dual batter when button is released to charge both batteries. My question is would the small battery have the power to run the coil while cranking or should I just go after the more obvious answer and replace the starter that is most likely drawing way more than it should. All connections are "clean, bright and tight" nice large cables and a hot battery but voltmeter at battery drops to 4 volts while cranking. Engine spins fine even in below 0 weather and would hate to spend big$$$ on a starter and still have same trouble. Already mad about created problem to save $ on dist. I just want it to start without charger. Thanks in advance for any input.

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Kelly Jewell (KY)

03-19-2005 12:53:34

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Re: Electrical problem in reply to BOB061, 03-19-2005 06:47:51

Bob, check the starter amp draw. Buy you a meter, your starter should not draw over 150 amps. I've checked several that were pulling 600amps. Say you have a 585cca battery and are pulling 500 amps on your starter, there is not much left for the ignition. If your starter is as old as your tractor is has every right to be bad....thanks, Kelly.

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Bob - MI

03-19-2005 09:18:32

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Re: Electrical problem in reply to BOB061, 03-19-2005 06:47:51

Bob,

I understand what you are going through but this sounds like a lot of work-around for a fundamental problem. Dell is probably right about the battery and I would look there first. Since we are talking about slow cranking in winter I also wonder about the oil weight in both the engine and the trans/hydraulic system.

In Michigan, I run 10-30 engine oil and MC-134 trans. lube. I also have adopted a habit of depressing the clutch when cranking. This removes the drag of the gearbox and pump while turning over with the starter. If you have any question about how much drag this is try it once and when it starts, let the cluth out and see the engine load it brings.

I have a 2N with slow starting habits but I am still using 6 volts and have no complaints....other than I am getting a lot of grey hair and my clothes don"t fit me as well as they once did.

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Dell (WA)

03-19-2005 08:38:28

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Re: Electrical problem in reply to BOB061, 03-19-2005 06:47:51

Bab..... ..geeze, classic description of BAD BATTERY. Annitt ain'chur starter motor eather. I'd byte the bullett and not even mucka'round with itty-bitty ignition coil booter battery. You doubt? Take yer battery in for a free check-up. $40 battery sure beats a $150 starter rebuild and you'd STILL have a BAD BATTERY..... ..respectfully, Dell (did I mention you have a bad battery?)

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BOB061

03-19-2005 09:28:40

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Re: Electrical problem in reply to Dell (WA), 03-19-2005 08:38:28

Thanks Dell and all who responded. I will have the battery tested, it's only a year old but who knows. I really don't want to complicate the system I just need it to work if the wife jumps on and it don't start I have to go through the flooded plugs routine. I was looking for a $15 bandaid to buy a little time untill I tear it down for a rebuild and get it all right for next years snow.

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BigGeorge

03-19-2005 07:32:09

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Re: Electrical problem in reply to BOB061, 03-19-2005 06:47:51

Bob, sounds like you are going thru alot of trouble when it would be just as easy to find and fix the real problem. Most automotive shops or parts stores will check your starter draw for free. Most hard starting problems result from a combination of things like starter draw, weak coil, bad plugs or plug wires etc. While your 2 battery idea may very well work you are only masking the real problem. Eventually your solution will become useless as the real problem will only get worse. Remember that old oil filter commercial quote "you can pay me now or pay me later". Good luck in what ever route you take..... ...BG

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roger '40 9n

03-19-2005 07:07:41

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Re: Electrical problem in reply to BOB061, 03-19-2005 06:47:51

Sounds like that would work.
I would look at using a small gel cell battery such as used in exit lights. The isolation relay also would work. I was thinking of the same thing but using a diode instead of a relay. But the voltage drop across the diode might make for charging problems on the small battery. You also have to figure out where to mount the second battery.

Roger in Michigan

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