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Discussion Starter · #1 ·
Where can I jump power on a starter generator to get it to crank with other wiring problems?

I have a 66 garden tractor I’d like to figure out the engine condition of, before digging into the actual harness to find the real issue.


The solenoid is not easily accessible to short the terminals.
 

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ryd, although I'm not familiar (hands-on) with the early 1xx tractors, I would think your motor/generator has 2 wires on it, maybe a black to ground and a Lt green to the voltage regulator. Verify ground with a meter and apply 12 volts to the other wire. From SM2069:
796670

Hope this helps, Bob
 
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ryd, Do you have Service Manuals? If not, check PM.... err, Conversations! Bob
 

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On the Gen/Start, there should be a "A" and a "F" (green wire) stamped into the housing.

Note: Black wire to terminal A, Green wire to terminal F.

To rotate(test) the gen/start manually, remove the existing wires on each terminal. Connect jumper wiring from a 12 volt source (booster/charger or battery) to terminal "A" to Pos(+) and Neg.(-) to gen/start housing.
 

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Where can I jump power on a starter generator to get it to crank with other wiring problems?

I have a 66 garden tractor I’d like to figure out the engine condition of, before digging into the actual harness to find the real issue.


The solenoid is not easily accessible to short the terminals.
As stated put 12 v on the A terminal. That will get the starter to turn, but you also need 12 v on the positive side of the coil to get spark. Once running remove 12v from starter.


Sent from my iPad using Tapatalk
 

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Discussion Starter · #7 ·
As stated put 12 v on the A terminal. That will get the starter to turn, but you also need 12 v on the positive side of the coil to get spark. Once running remove 12v from starter.


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The tractor has a very happy new owner, except he still needs parts for the one he’s restoring.

There’s about 1/4” clearance metal gas tank to s/g posts on that tractor, so if he didn’t want to start it I was ok with that.

I never looked in the tank, I use a push mower tank to test core function this week.

This was a suburban 12, a big block 112 rf.

I have a nice original roper rt-10 I haven’t brought home to test. It’s under cover and I don’t want to treat it as bulk.




That’s a snowblower on the left shelf.
 
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