The compression ratio of a Tecumseh 5 HP engine typically ranges from 8:1 to 10:1, depending on the specific model and application. Compression refers to the reduction of the air-fuel mixture in the engine's cylinder before ignition, which is crucial for efficient combustion and power generation. Higher compression ratios generally enhance engine performance and fuel efficiency but may require higher-octane fuel to prevent knocking. It's important to check the engine specifications for the exact compression ratio of your specific Tecumseh model.
about 33 mph
That is the main jet needle valve.
The plug gap for a 5.5 hp Tecumseh is .030 in.
how many cc is a 13 hp
An Autolite 258 is the recommended spark plug for a 6. 5 horsepower Tecumseh engine. A Champion RJ19LM also is recommended by the manufacturer.
what is the capacity
From the Tecumseh Jiffy Drill website: Ratio for Tecumseh TVO85 (3 hp), AV520 (3 hp), AV600 (3.5 hp), TMO49 (2 hp), TC200 (1.6 hp) and TC300 (2 hp) engines is 40:1. For a 40:1 mixture: Mix 3.2 oz of 2-cycle oil to 1 gallon of gasoline.
Tecumseh website, "All spark plugs air gap is .030."
twenty eight ounces
Tecumseh provides dealers with a 0.012" air gap guage, but 0.010 - 0.014" will do.
.030 inch ( on my 24 year old 5.0 horsepower Tecumseh engine )
My John Deere snowblower with a 5 horsepower Tecumseh engine takes ( 20 ounces ) which would be .625 of a U.S. quart