It is usually above the float in the little bowl at the bottom of the carb.
11/64"
10w40 will work fine!
10w40 motor oil will work fine!
.030"
My 5 horsepower Tecumseh on my John Deere snowblower takes : ( 20 ounces / 600 ml )
one quart. Use the oil dipstick!!
My book for my John Deere snowblower , which has a 5 horsepower Tecumseh engine , shows to use the Champion RJ17LM spark plug
exaust header aluminum flywheel bigger valves racing cam
According to my owners manuel the spark plug gap is 30
Sounds like u have carburetor problems!
spark plug gap, gas/air mixture on carb.