Heat load calc- Gas engine

[jc001]

I am trying to calculate the heat load given off to the surroundings from an 8 HP internal combustion engine. ASHRAE looks to give a formula for an electric engine but not a gas engine. Also, what type of efficiency would you expect (lawnmower type engine). Thanks.

 

[pmover]

not being sarcastic, but a telephone call to engine mfg will likely provide the needed heat rejection results.

as far as efficiency, perhaps 25% or so.

good luck!
-pmover