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Outlaw Tractor Collector
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Discussion Starter #1
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?
 

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Premium Member
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9,672 Posts
My 1988 Horzontal and 1990 Vertical are both happy with Champon RJ19LM's

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

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Premium Member
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Outlaw Tractor Collector
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Discussion Starter #5

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Certified Technician
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8,420 Posts
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
 
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