[98Murray]

I have this verticle shaft Briggs & Stratton Opposed Twin in my 1986 Lawn Chief Garden Tractor and I want to replace the sparkplugs and I figured this one has RJ19LM plugs because every other Opposed twin I have messed with has those but this one has RJ12C plugs so I am not sure what to do. I dont know if these older 18 horses take RJ12C plugs or if a previous owner replaced the plugs with non correct ones. Anybody know what plugs my engine is suppose to have?

 

[larrybl]

My 1988 Horzontal and 1990 Vertical are both happy with Champon RJ19LM's

For a exact answer, post the engine Model and code numbers

 

[98Murray]

My 1988 Horzontal and 1990 Vertical are both happy with Champon RJ19LM's

For a exact answer, post the engine Model and code numbers

Thanks for the answer

Model 422707

Type 0145 01

Code 861 2612

 

[larrybl]

Spent a couple minuets searching.
This site indicates Champon RC12YC
http://www.repairclinic.com/Briggs-...Model-4227072200E1-ID-781934-Spark-Plug-Parts

And the Briggs site gave a OEM part of 394539
http://www.briggsandstratton.com/us...trated-parts-lists?modelnumber=422707-0145-01

If this was mine I would go with the OEM.

 

[98Murray]

Spent a couple minuets searching.
This site indicates Champon RC12YC
http://www.repairclinic.com/Briggs-...Model-4227072200E1-ID-781934-Spark-Plug-Parts

And the Briggs site gave a OEM part of 394539
http://www.briggsandstratton.com/us...trated-parts-lists?modelnumber=422707-0145-01

If this was mine I would go with the OEM.

Thank you! Im gonna go with OEM style

 

[RED-85-Z51]

The briggs number crosses to a J19LM...and RC12YC is 2X longer in reach and should not work. an RJ12C is just a different heat range than the RJ19LM