Cub starting problems

Kyrock · Apr 18, 2012

I bought a 1964 cub, I had to put new points,condenser, and rotor button to get it to start, the carb, was a mess, I cleaned tank and fuel line and put a different carb that I knew was good. While doing the previous I was using a jumper box as my source of power..It is 12 volt system with an alternator and disturbor. I then installed a new 12 volt battery, tractor started and ran fine..turned off and started and ran and ran a few more times, everything seemed fine..Went to start later, it would not start, turns over fine, but I have no spark at the points. The amp gauage seems ot work ok, but now the needle is resting all the way over to the right,,ANY help will be appreciated,,,,Thanks

stumper · Apr 18, 2012

I believe the power goes thru the amp meter,
so check if you have voltage going thru the
amp meter and power going to the ignition
switch and to the coil by using a volt meter
or a test light. have a good time old red,
stumper

mkirsch · Apr 19, 2012

I suspect you blew the 6V coil by running it on 12V power, or burned the points, or both. 1964 should still have a 6V system.

The ammeter swings all the way over to the right when you turn on the ignition switch, right? That means the tractor was 6V positive ground originally and you are running 12V negative ground...

...AND you have a DEAD SHORT somewhere.

Don't leave the switch on now, or you're going to start smelling the distinct odor of burning wire insulation. You need to inspect the wiring looking for burned, or bare wires, just in case there's a short there preventing it from starting.

The short may be in the coil, or the points may have welded together too.

El Toro · Apr 19, 2012

Is your coil 12 volts? You need your points open to check for voltage at your coil and with the ignition switch in the "on position". I would try another condenser. Hal

Kyrock · Apr 19, 2012

The only place I have power is on the push button

El Toro · Apr 19, 2012

That's for providing voltage to the starter when you press the button when trying to start the engine.

You should have an ignition switch that provides voltage to your coil. There should be a wire that feeds voltage to your ignition switch to one of the terminals on your switch. Use a volt meter or test lite to check for voltage at the switch. If there's no voltage feeding your switch you need to trace that wire back to where
its getting voltage. You may have a broken wire or bad connections.

If you have voltage on that wire, put the switch in the "on position" and check for voltage on the terminal that feeds voltage to your coil. If there's voltage here and none at the coil replace that wire to the coil. Hal

El Toro · Apr 19, 2012

When the ignition switch is in the on position and you do not have any voltage on the terminal
that feeds voltage to your coil, replace the ignition switch. Hal
PS: Run a separate wire from the + battery terminal to your coil and see if the engine will start.

Cub starting problems

Kyrock

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stumper

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mkirsch

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El Toro

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Kyrock

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El Toro

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El Toro

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