2N plugs

My "47 model 2N which I restored about 14 months ago started running rough one day recently when I cranked it & just didn"t have much power.

We pulled the plugs out & found the #1 & #2 plug fouled. #2 was the worst having a lot of oil & carbon buildup on it. Of course after cleaning & re-gapping it ran fine.

Question is, what is the better plug to use? The manual calls for a Champion "H-10". When I got the tractor 8 years ago it had Champion "H-12" installed in all four cylinders.

It was suggested to me that I could try a slightly hotter plug like the "H-14" to minimize carbon buildup. I thought that a hotter plug could cause burned valves.

Anyone out there have experience with different plugs? Any help is appreciated. Thanks.

Gary
Baton Rouge

Modern no-lead gasoline is 88 octaine gasoline that doesn't ping in low compression engines; and the natural process of combustion leaves behind "carbon" deposits that will foul cool plugs. Increasing the "heat-range" of the sparkie will help to burn-off these deposits and reduce fouling. Champion H12 would be a "hotter" sparkie, H8 would be a COLD sparkie for high-compression racing engines.

My latest Champion sparkie information indicates they no-longer make the H12 or H14. They do make a much "hotter" RH18Y. It is a "resistor" plug designed to reduce radio-static interferance. The resistor requires a HOTTER sparkie than yer squarecan ignition coil can sparkle. DO NOT USE RH18Y, understand?

Most N-Engines are best sparkled by an exposed tip sparkie like AutoLite AL-437. It is a "hotter" sparkie that burns-off deposits better than the enclosed/shrouded Champion H10 or H12 which tend to foul eazier.

And NO, hot spark plugs don't burn exhaust valves..... .....Dell, yer self-appointed sparkie meister