My lawn mower model is a Powersmart DB8621CR. What spark plug do I use? the manual mentions spark plug 0.7-.8 mm gap (0.28-31 inch). in parts list it mentions stock # 30010-z120110-00a0. Manual makes no mention of what spark plug plug to use like champion or e3 for example.

What plug is in there now?

PowerSmart Lawn Mower Parts-170cc Spark Plug, Stock #30010-Z120110-00A0

Item: 170cc Spark Plug,30010-Z120110-00A0For PowerSmart Lawn Mower Model: PSM2020 DB2194SR

powersmartusa.com

 

i ended up pulling out the spark plug and it was a torch f5rtc. I think i finally found alternative and so far it seems like e3.22 is the only one that replaces it. But I cant complain because from personal experience e3 spark plug seems to be better than champion. I will definitely double check and measure it too be on the safe side. Seems like the same gap size too. when i tried to look up the sparks on a few brands by the lawn mower model, my model it didnt show up. Its odd its not its wasnt easy too find. I hope my post helps other have the same model lawn mower.

 

From what I found searching here in Canada, it seems any plug with a heat range of 7. NGK BPR7ES or Champion RN97C. Found this info on Canadian Home Depot for Laser Powersmart plug. Definitely not the easiest replacement to lookup!

 

Yea, I found no cross reference for it at the champion site, the one thing to be cautious of is the depth of the threaded portion so it's the same length.
Too long possible cracked piston.

 

Absolutely the best thing is to bring old plug in. Thread size, pitch and length have to be identical. Heat range is not as crucial in a lawn mower as much as a vehicle. Too cold a plug and it will foul up sooner. Too hot a plug and the electrode will burn up a bit. At a Canadian Tire here, I helped a guy who was looking for a plug for his Yardworks brand of generator. Same thing, no number on the plug. We just compared his old plug with new one on the shelf.