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Tecumseh website, "All spark plugs air gap is .030."
Use this link-http://manddsmallengine.com/tecumseh/info/plug2.html
.060
The correct spark plug for 2001 1.6 Ford Focus is NGK TR5A-10 with a gap of 1.3mm
you have to make ngk b8hs-10
The correct gap is .040 in, for a NGK BPZ8H-N-10 plug.
Brand: NGK Plug No. BP8H-N-10 gapped at 1.0mm (0.029")
NGK BPR6HS-10 spark plug. Gap is .040
The actual model number is below the 63902 and begins with 11A Mine is 11a-436a711 and has a 6.5 Hp B&S Quantum engine. The spark plug listed is B&S part number 492167. I use the E3 spark plug available at Lowe's and the number is E3-10. Hope this helps.
The spark plug torque spec range is between 6 and 10 ft/lbs.
Spark plug failure,Spark plug wire failure,Vacuum leak,Fuel injector failure,
Spark Plug Gap = 0.060 for both S-10 & Trailblazer vehicles 1996-2005.