Propeller for bukh 36

[whitegate]

What I do know is the diameter is 16 inches .  There are 17 splines.  It is made of aluminium.  It is for a 1984 lm 32.  What I do not know so as to order a new prop is the pitch and whether the gear reduction is 2:1 or 3:1.  Can anyone help. Thanks. Eddie

[Brian & Glenda]

I can look at my spare prop next time at the boat to see if it has the pitch stamped on it; but assuming your engine is a Bukh DV36 SME, then the gear reduction is, according to the Bukh workshop manual: 2.25:1 for both forward and reverse.

[whitegate]

Thank you Brian and Glenda for your response. Any information on pitch would be welcome. Eddie

[Sula]

There are various prop pitch calculators on the internet (e.g. castlemarine have one, but only works with some computer operating systems). But probably your best bet is to talk to a prop supplier, who will do a calculation for you, and deal with any other queries you might have.

T. Norris is a prop (and Bukh parts) supplier that seems to have good reputation. (I've only used them for engine parts myself.) shop.tnorrismarine.co.uk/collections/standard-manganese-bronze-propellers-propeller-prop

Other suppliers are available.

Hope you get sorted.

[Brian & Glenda]

Hello whitegate,

The diameter and pitch of the spare 3 bladed propeller that came with my 1983 LM32 with Bukh DV36SME, is: 16 x 11.
The saildrive gear ratio is as I noted above, according to the Bukh workshop manual: 2.25:1 in both forward and reverse.
I can post or send photos of this prop if you would like to see same.

I believe that this prop is identical to the one that is affixed to the saildrive now, but I have not done any direct comparison.

I don't know why my boat came with a spare propeller, and its conical locking nut etc. when I bought the boat in 2014. Unfortunately I don't know who the previous owner is, so I can't ask him/her. I'd like to believe that the previous owner was just 'being prepared' just in case he ever ran over a log or such, but it could be that a previous owner wasn't happy with the performance of one prop, so changed it to another.

Hope that helps...
Brian.