Home › Forum › Ask A Member › OMC 3hp Lightwin – JW gearbox- prop › Reply To: OMC 3hp Lightwin – JW gearbox- prop
Six motors apart at the same time! That would, to say the least, be confusing for some of us.
Regarding the different starters, there are two types. The Simplex starter, for the 3 Hp, was used from 1952-1955. In 1956, the Eas-A-Matic starter was introduced, with the elliptical pulley, which made it possible to turn over the motor with less force.
As far as the different props go, the earlier props were three bladed as you had mentioned. My limited understanding is the change from the 3 blade to the 2 blade props occurred because the earlier 3 blade setup had a tendency to over-rev, causing connecting rods to break.
The minor changes in the gearing may also be related to the over-rev issues. I’ll be interested to see what others have to say.
Improvise-Adapt-Overcome