ah, you just might wish to remember that the prop MUST push against the prop
shaft which pushes against the thrust bearing to push the boat forward. Got
to.

In other words, the thrust bearing takes 100% of the horsepower developed by
the engine. That is a lot. In forward.

There is also a thrust bearing needed for going in reverse as well. However,
as the horsepower used in reverse is much less and the time it is used is
hugely less the reverse thrust bearing need not be anywhere near as big.

Now, change the prop so the former reverse thrust bearing becomes the new
forward thrust bearing and operates at 100% power over extended time the
potential to trash that bearing becomes very real.

Most people forget that the prop has to push against something to push the boat
forward. That something is the thrust bearing.

the trust bearing is wrong.

snip


Hi.

It should be or should be not.

It is depending from "direction" not "rotation":

"Forward" is always forward so Propeller is always "pushing" the vessel.

Usually is the "Propeller Shaft" to be supporting the pushing efforts.

Gears and Clutches are supporting only the rotational torques.

But in any way has to be examined the specific Driveline, application and
purpose.

Same thing for Gearbox engineering, drawing, performance and manufacturer
technical choices...

By the way in North Adria Sea and Lagoon of Venice all Clam Dredgers are
operating in Reverse !

So a lot of fishermen are replacing rotation of Propeller just to operate
Gearbox in "Forward"...

... other ones are "preferring" to operate in true Reverse as so the
gear-ratio is wider than Forward one...

In any way it is a good thing don't operate DIY on ANY vital parts of any
kind ofvessel...


Bye,


WinXP