318cc. is 8hp. 305cc.is probably between a 6 to an 8hp.
between 9 and 11hp
8hp-14hp
8 Horsepower
8 to 10 hp
11 horsepower
Its between 5 to 6.5 hp.
12 hp
5.5 to 6 h.p.
it depends if it from an el camino probably not much but if it is from like a car like a camaro it will have more to answer the guestion maybe 250-350 The question was 305cc , not 305 cubic inches (5000cc) . 305 cc is about 18.6 cubic inches So this does not refer to a car engine. This size engine as used in a snowblower usually develops 8-11 horsepower , the same size engine in a high performance motorcycle could develop 25 -50 horsepower.
If that is a 5 horsepower Tecumseh engine - ( .030 inch )
My John Deere snowblower with a 5 horsepower Tecumseh engine takes ( 20 ounces ) which would be .625 of a U.S. quart
13.5