Spark Plug Grounding out

Tue Mar 11, 2014 12:59 pm

I have a 1976 IH Cub that wont't start unless I pull a plug wire off to the point where I can see the arc from the wire to the plug. While running I attempt to put the wire all the way on the plug, however as soon as the rubber hits the the plug it goes dead and doesnt want to crank again unless I start all over where I can see the arc. Any suggestions as to what is happening?

Re: Spark Plug Grounding out

Tue Mar 11, 2014 4:42 pm

New spark plugs? Plugs are probably fouled.

When was last complete tune up?

Re: Spark Plug Grounding out

Tue Mar 11, 2014 5:34 pm

That is my first step. I have new wires in the truck and plugs on order. Not sure when the last complete tune up was done, havent had it long. Thank you for your reply.

Re: Spark Plug Grounding out

Tue Mar 11, 2014 7:02 pm

Make sure your new wires are solid metal core, not resistor wires.

Re: Spark Plug Grounding out

Tue Mar 11, 2014 8:34 pm

Thanks. I didnt know that. I will have to check them.

Re: Spark Plug Grounding out

Wed Mar 12, 2014 7:09 am

As Eugene said, fouled plugs can do exactly as your tractor is doing.

Re: Spark Plug Grounding out

Tue Apr 01, 2014 6:38 pm

I've had that happen on a single cylinder kohler. Plug was shorted to ground internally. Fought that damnable thing for a weekend years ago and will never forget it. Probably the last time I ever used Champions too.

Re: Spark Plug Grounding out

Tue Apr 01, 2014 10:00 pm

Guys I appreciate all your input. I changed the plugs and all is well. Thank you all so much.