de-rated Merc outboards

[tc3drivers]

I had a person tell me Merc changed the way they measured the HP of the motors in the 1980's from crank to prop HP. I know they rebadged the 4 cyl 50hp but is this true with the entire lineup? He says the 115 was rebadged a 90 and the 125 rebadged as a 115, and so on and so on.... If measured at the prop vs the crankshaft, the HP numbers would be higher and the reverse of what he is telling me would be the case.

 

[usskydvr]

Re: de-rated Merc outboards

I think it was in the 83-85 time frame when the measurement changed from crankshaft to propshaft across the whole line. (Prop HP will always be lower than crank HP)

 

[Fuzzytbay]

Re: de-rated Merc outboards

I think it was more like the mid 1960's. Not sure of the year, 65- 67.