The metric and English units of measurement have quite a bit of difference, but you may need to convert both measurements in order to make proper calculations. Briggs & Stratton engines come with both cubic centimeter (cc) and horsepower ratings. The description plate attached to the top of each Briggs & Stratton engine lists the model number and engine power. A Briggs & Stratton engine with a "CC" rating rather than a "HP" rating will vary a bit above or below the converted HP rating depending on how well tuned the engine is at the time of testing.
Step 1
Turn the Briggs & Stratton engine upright so the flywheel shroud is facing you.
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Step 2
Locate the information plate attached to the top of flywheel shroud.
Step 3
Find the horsepower or CC rating listed on the information plate.
Step 4
Calculate the horsepower or CC by multiplying or dividing by 15. The general rule is for every 15 CC there is 1 HP.
For example, for a 150 CC engine you would take 150 divided by 15, which equals 10 HP.
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