There could be several reasons why your Tecumseh 4.5 hp engine won't start. Common issues include a clogged fuel line or old fuel that has gone stale, preventing proper fuel flow. Additionally, check the spark plug for wear or damage, as a faulty spark plug can hinder ignition. Finally, ensure that the air filter is clean and not obstructing airflow, as this can also affect starting.
The plug gap for a 5.5 hp Tecumseh is .030 in.
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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.
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Tecumseh website, "All spark plugs air gap is .030."
about 33 mph
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 )
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i have 5 hp Tecumseh that goes about 30-45 at top speed and my other 16hp duromax goes way faster so maby 60-70 mph
7,2 dl.