Autolite 258
Champion J8C
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An Autolite 258 is the recommended spark plug for a 6. 5 horsepower Tecumseh engine. A Champion RJ19LM also is recommended by the manufacturer.
Champion RN4C - Gap .030"
Chanpion RJ19LM
Use a Champion RJ19LM set to a 0.030" gap.
For a 12.5 hp Tecumseh 4-cycle engine, the recommended spark plug is typically the Tecumseh part number 6400A or equivalent, such as the Champion H10 or H12. Always check the owner's manual or the engine's specifications for the exact spark plug type, as variations may exist based on the engine model. Properly gap the spark plug according to manufacturer specifications to ensure optimal performance.
Rj19lm
.030
My book for my John Deere snowblower , which has a 5 horsepower Tecumseh engine , shows to use the Champion RJ17LM spark plug
The appropriate spark plug for a 6HP Tecumseh H60 Snow King engine is typically the Tecumseh part number 36079 or an equivalent. The recommended spark plug type is usually a Champion J19LM or a similar model. When selecting a spark plug, it's essential to ensure it meets the specified gap and heat range appropriate for the engine to ensure optimal performance. Always consult your owner's manual for the most accurate specifications.
.030 inch ( on my 24 year old 5.0 horsepower Tecumseh engine )