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My book for my John Deere snowblower , which has a 5 horsepower Tecumseh engine , shows to use the Champion RJ17LM spark plug
one quart. Use the oil dipstick!!
11/64"
10w40 will work fine!
.030"
10w40 motor oil will work fine!
1ml
It is usually above the float in the little bowl at the bottom of the carb.
5hp @ 3600 rpm, according to trupower.com
Probably around 1/2 quart. Drain the oil and just put in enough to reach the full mark if it has a dipstick. If it has no dipstick then fill it up until oil runs out the fill hole.
Sounds like u have carburetor problems!