17.5 hp 42 in. Deck Lawn Tractor – CA Model

On a craftsman mover LT 2000, I replaced the battery, and mower still won’t start, I am thinking it is the spark plug.

Thanks,Ron

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Replacement Plug

The Craftsman 4.5hp mower uses either a Champion model RJ19LM or J19LM spark plug, or equivalent, with the gap set at . 030 inch.

The spark plugs are typically located at the top of the cylinder head. The piston moves down the cylinder where it take in a combination of air and fuel. Next, the piston travels back up to the spark plug, compressing the mixture.
A spark plug is an electrical device that fits into the cylinder head of some internal combustion engines and ignites compressed aerosol gasoline by means of an electric spark.
There will be one spark plug for each engine cylinder. Most small engines only have one spark plug, twin-cylinder engines will have two spark plugs, four-cylinder engines will have four spark plugs..and so on…
The gap setting is different for each vehicle but most are somewhere between 0.028″ and . 060″. Consult the owner`s manual or Champion ® catalog to find the recommended setting for the vehicle you`re working on.
A: This spark plug should have a gap set to 0.02 inches.

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http://www.manddsmallengine.com/briggs/info/plug7.html

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