thoughts on a 125 hp force actual hp.

[javsam]

I was recently told that a 125 hp force is the equivalent of a 90 hp,because of the way they measured the horse power at the engine instead of the prop shaft.is this accurate or just b.s.?<br />regards<br />javsam

 

[WillyBWright]

Re: thoughts on a 125 hp force actual hp.

In the mid 80s, outboard manufacturers began rating horsepower at the propshaft rather than at the crankshaft. That allowed them to make the powerhead a little more powerful and run faster (hopefully) than the competition. Force never changed. The gearcase eats about 15% of the power produced by the powerhead. So by that formula, it's closer to 105Hp compared to motors that follow the new rating method.

 

[javsam]

Re: thoughts on a 125 hp force actual hp.

thanks will.<br />javsam

 

[roscoe]

Re: thoughts on a 125 hp force actual hp.

http://forums.iboats.com/cgi-bin/ubb/ultimatebb.cgi?ubb=get_topic&f=20&t=013211#000000