Re: Universal M25 losing power
Have you ever been able to rev to 3K?
Different max revs in fwd/rev could be tied to the gear ratio differences, together with perhaps an overpitched or oversized prop (assuming you've never reached 3K).. also (maybe more relevant) max revs when trying to tow a secured dock away would be different than underway, I'd think....
".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)
1984 Fast/Nicholson 345 "FastForward"