Prop Pitch on Freedom 32 Hoyt

Boat Systems
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1

I cannot figure out what the pitch is on my original Freedom 32.

2 blade, 14"

Putting in a new Yanmar this month - they want to get the most out of it and want to make sure it has right prop. Do it once, do it right.

My god is this expensive.

Any help?

2

Which yamnar 1,2,3
I haver the two blade autoprop on my 32
5.5 kts at 2000 rpm with a 3gm30f
Also good in reverse

3

Yanmar 3gm30f as well

Had original 3gmf…but kept same prop

14” prop but Yanmar asked what the pitch is. No idea at all.

Putting in the newest Yanmar version this month

HELP

4

With a new engine, the old prop specs should not matter. The new prop specs will depend on (1) new engine output, (2) new gearbox ratios, and your choice of prop (i.e. 2-blade, 3-blade, variable pitch, etc.). The other critical variables (displacement, LWL, and maximum hull speed) presumably have not changed. If Yanmar is asking you for the old prop specs, they are just being lazy and do not want to recalculate. Don´t let them do that.

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5

On my 32 the original engine was a 3GM making 22hp. The propeller was 2 blade 14 X 14.

6

Thanks everyone. The info really helped the team arrive at some conclusions.

We are looking at possible new props for the new Yanmar.

7

Thanks. I got away from sales and into the engineering department and went through all of this. Yes, they were being lazy - and for $10K that is kinda unacceptable.

They were really worried about getting up to hull speed. My experience is that a half a knot or so isnt a big deal for me.

8

I agree with you half a knot on cruising speed isn´t a big deal, but not all revs of the engine translate into speed in all situations. A slightly over-spec prop for example (and a three-blade over a two-blade also) will give you the torque you need at the higher range to fight a tidal current, or get in and out of moorings easier with a bit of wind.

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