exaust header aluminum flywheel bigger valves racing cam
about 33 mph
[object Object]
7,2 dl.
Autolite 258
.030 inch ( on my 24 year old 5.0 horsepower Tecumseh engine )
An Autolite 258 is the recommended spark plug for a 6. 5 horsepower Tecumseh engine. A Champion RJ19LM also is recommended by the manufacturer.
SAE 10w30 Synthetic oil.
SAE 30 for operating at or above 32 degrees.
Champion RN4C - Gap .030"
Set the spark plug gap to .030"(.762mm).
cc's cannot be converted to hp. If your figure was correct, then a 3.3 cc nitro engine wouldn't have a 1/3 of an hp. It's been tuned for right under 1.5 hp.
This is a Tecumseh engine. According to the Tecumseh web site all small engines have a 0.030 gap