Correct spark plug for 675EXI 163CC

[wantboost]

its a mtd gold what's the corrext plug ?

Currently has a autolite 3924 which i feel is wrong ...

 

[Scrubcadet10]

i believe that engine uses a J19LM champion plug or its equivelant.
What's the model number of the engine?

 

[Hammermechanicman]

I think there is a L head 675EX and a OHV 675EXI engine. Need engine numbers or weather it is L head or OHV. The autolite plug crosses to champ rc12yc so that plug is for an OHV engine.

 

[wantboost]

Its OHV . why are the oem ones coated and look copper tho ?