The Answer to your question RJ19LM spark plug set at 20 thousand of an inch.
According to my owners manuel the spark plug gap is 30
Tecumseh Part #611049 - Champion Spark Plug #RCJ8Y
Tecumseh website, "All spark plugs air gap is .030."
My book for my John Deere snowblower , which has a 5 horsepower Tecumseh engine , shows to use the Champion RJ17LM spark plug
I have used a Champion RJ19LM or J19LM, both work fine.
The plug gap for a 5.5 hp Tecumseh is .030 in.
Actually, there are a few different possibilities depending on the exact model of your Tecumseh. Here are the most common models that were equipped with 8.0 HP engines, and the corresponding correct spark plug (note, part #s are for NGK brand plugs. If you go to an auto parts store or power equipment supplier, they will most likely be able to interchange the part # if they don't carry NGK). H80, HM80: BR4LM HH80, HMSK80, TVM195, TVXL195, VH80: BR6S Snow King 4-Stroke engines HMSK80: BR2LM
.30
.030
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.
The right spark plug for a 3.5hp Tecumseh engine is typically a Champion J19LM or an equivalent plug. However, it's essential to verify the specific model of your engine, as some variations may require different plugs. Always consult the engine's manual or manufacturer specifications to ensure compatibility.
Champion RN4C