D4 Pony Spark Plug Sources

Upon advise of others on this site and ACME I have had good luck with non-resistor NGK-A6 plugs and solid core wires. Look at NAPA.

Upon advise of others on this site and ACME I have had good luck with non-resistor NGK-A6 plugs and solid core wires. Look at NAPA.

The NGK A-6 is obsolete and is now known as NGK AB-6 and solid wire are the way to go. The magneto does not play well at all with resistance wire. You may have to go to a marina to buy solid wire.

Thanks also OldNuc.

The Champion plugs that are supplied by our Cat dealer have proved troublesome after a period of use.I get my plugs( NGK )from a boat yard now.No problems anymore.I guess the Champion plugs break down as Old Nuc says.

Champion used to be the high quality plug but that was a long time ago. Now if you want a good spark plug buy the NGK.

are both fine. Chances are, if you clean the plugs that are in it now. They'll work better than any you can buy new. As fas as the solid core wire, its still used on some performance and hotrods meaning our local auto parts store carries it. I run Autolites in my D2 pony motor with good success.

I have Champion UD-16 plugs in D2 3J which work ok...
I found Autolite 376 plugs on one CAT 212, and Autolite 386 plugs on the other CAT 212...
The local auto parts house says that the Autolite 376 plugs have been discontinued...but does carry the Autolite 386 plugs...
I put Autolite 386 plugs in the pony motor on the CAT 212 I'm workin' on and they work just fine...

The NGK A-6 is obsolete and is now known as NGK AB-6 and solid wire are the way to go. The magneto does not play well at all with resistance wire. You may have to go to a marina to buy solid wire.