Google says 357cc is equal to 13 H.P.
1hp=42cc thus 8.5hp=357cc..
Most lawn and garden equipment motors run about 1 HP for every 25CC ... so a 357 would be somewhere around 12-14 HP.
1HP = 16cc [approx] therefore, 357cc/16 = 22.3125
MTD
42 CC = 1 hp357 cc engine would be 8.5 hpPower isn't a function of displacement, and there isn't an equation that converts cubic centimeters to hp. This is a better question for the manufacturer (MTD I believe). I guarantee that engine has more than 8.5 hp.
15 hp
What is the valve setting on a 15.5 hp yard machine mower by MTD?
Approx 6 hp
3.3 HP
The type of spark plug will depend on the type of Briggs &ÊStratton engine and equipment configuration. However, for the spark plug gap, the common setting is 0.030 inches.
Not enough info to determine hp.