Spark plug mystery.....multiple types listed.

Normally spark plugs are no problem for me but I have a weird situation where there are multiple choices for plugs....very confusing. I bought a 1996 Yard-Man 316E633E401 7hp snow blower recently due to the constant snow we have had. It looks great and runs well but since it is old I want to tune it up, change oil etc. so I KNOW what is in the engine. Downloaded the Yard-Man manual on this thing as well as Tecumseh parts lists for the motor (HSK70 / 130291S)...here is what is recomended.....Yard-Man J8-C, Tecumseh RJ17LM, and Champion shows RJ19LM.....I am thinking of using an E3.10F made by E3, which replaces the latter two. Puzzling that the J8-C was listed by Yard-Man paperwork though....As for the plug that's in there now.....not the right one either...someone put an Autolite 295 in it..A CAR PLUG according to my information.. Any thoughts???

 

Small follow up....the Autolite 295 replaces the J8C Champion.....so now I am less concerned someone had a horribly wrong plug in, but still not sure which to go with

 

Whichever you pick, you'll never know the difference. All the ones you listed should work fine.

 

Thanks! After some more searching I found the E3 plug (E3.10) replaces all three, LOL. Strange so many plugs recommended though. Maybe Champion should make less part numbers Thanks again!