Best Spark Plug for mod# 10323, 6.5hp Silver Edition?

Thanks for your help!

Champion CJ14

Thanks Fireman!

Champion
RCJ6Y - if you want a bit colder heat range, plus it will fit a lot of makes of OPE trimmers, saws, blowers etc..

14mm Thread Size, 9.5mm (3/8") Reach, 13/16" (20.6mm) Hex Size, Gasket Seat, Resistor, Projected Tip, Heat Range 6

CJ14
14mm Thread Size, 9.5mm (3/8") Reach, 13/16" (20.6mm) Hex Size, Gasket Seat, Non-Resistor, Heat Range 14

NGK
BPMR7A (equivilent to Champ RCJ6Y)
Traditional Spark Plug, 14mm Thread Size, 9.5mm (3/8") Reach, 3/4" (19mm) Hex Size, Gasket Seat, Resistor, Removable Terminal Nut, JIS Height, Projected Tip, Compact Plug, .028" (0.7mm) Gap, Heat Range 7

Mine came with an NGK BPMR4A gaped at .35. Are plugs you show just preferred? Do you know what the ID/OD of the fuel line is? I was just going to use some Tygon but I can't find those numbers.

Fireman 123 said:

Champion CJ14

Click to expand...

Thanks Fireman 123. My initial thought was that I preferred the NGK plugs. But after thinking about your recommendation I realized that there is no good reason that I can think of to have a resistor plug in a two cycle mower. The NGK has a much wider heat range than the CJ14, but so what. As long as the Champion CJ14 can handle the heat range that the Lawn-Boys operate than it is a good deal. I wonder why Lawn-Boy switched to the NGK resistor plugs for some of the later models?