Call any auto or small engine repair shop they will have books on that info!
According to my owners manuel the spark plug gap is 30
The correct spark plug for a 5 hp. Tecumsen 4-cycle motor is Champion J-8 (RJ17LM). The plug gap is 0.030 in. (0.76 mm)
.030
My book for my John Deere snowblower , which has a 5 horsepower Tecumseh engine , shows to use the Champion RJ17LM spark plug
.030"
rj8 is used for a 7hp Tecumseh that powers a 22" yardman snowthrower
.030 in. or .076 mm gap
.030 (0.76 mm) gap. Use a Tecumseh resistor plug.
J19lm
Per Champion spark plug applications chart, the gap for 6hp Tecumseh engine is .030
Any auto or small engine repair shop will be more than happy to help u. Any problems e-mail me!
Tecumseh website, "All spark plugs air gap is .030."