Forums, Engine, Gearbox, Stern Gear, etc, Transmission noise

Keny at 24/06/2012 11:18:51
Just a note about transmission vibration/noise on my co32 with beta 3 cyl. engine.
This was finally completely cured this year with the fitting of a Campbell 12/7 low drag prop. and a
Centaflex M127 rubber coupling.
For the first time I can run quietly at full power i.e. 3200rpm at 6.7 knots.
Hope this low cost solution may be of help to other owners.
Keny

doug at 03/07/2012 21:00:11
That sounds good Keny, I already have a Centaflex coupling but there is still a lot of noise from “down under”.

Keny at 04/07/2012 11:21:12
Yes it is 12"/7" and is 3 bladed but it is cupped at its trailing edge. It is of compound shape and made by North by West Enterprises in Canada.
My reasoning for picking it was that the co32 was originally designed for a 12" prop or smaller so all I was doing was reverting back to the original design where presumably there was no vibration.
Naive maybe but it worked for me.
keny

doug at 06/07/2012 21:54:51
Thanks for that…
It is certainly worth thinking about.