Confused about which spark plug for a 68540 is recommended by lawnboy. They seem to specify three different ones! Online, using that model, looking at the engine manual - they spec CJ-14. Online, using that model, looking at the operators manual they specify RJ-12C. And online, for that model, if you click the specifications tab - yes another spec RJ19LM.
What the #*$#&!
#2
Fireman 123
Buy all of them. Starting with the cheapest, try them all out, and pick the best one. I've always used cj14 without an issue.
For the extra two bills I took your advice and bought both the CJ14 and the NGK BPMR4A. I did not think to buy the NGK BM4A while I was at NAPA. Is that a better idea than the BPMR4A because it is not a resistor plug or are they the same thing?
#6
Fireman 123
I wish I could offer the technical advise on spark plugs. I use cj14 because lawn boy says to. My mowers run and cut grass so that's all I worry about. Not being crude. Glad I was able to help some.
