View Full Version : Indmar HP rating

Will Watters
01-26-2005, 01:25 PM
Just ordered my Mobius with the 325 HP Indmar MPI. I am curious if this is gross HP provided by the motor or net HP available at the prop. Anyone have info on this??

John Wade
01-28-2005, 10:00 AM
All the provided information is from Indmar, so the numbers are from the engine
only. With the use of the flexplate and not a torque converter we loose the torque
multiplier effect. But the 1:1 tranny and shaft create a very minimal parasitic
loss. If you were to look at the torque curve of the engine ( installed in the boat)
it goes straight up from idle to around 1500-1700 rpm. This is cavitation of the prop.
Where the initial inertia of the prop slows down as it bites into the water.

01-28-2005, 10:32 AM
Here is another suggestion if you really are interested in the information.

The engine is from Indmar. I have gone to there website and asked questions about their engines and I have gotten very quick and comprehensive answers. There is a guy there named Larry who really knows his stuff.