timj
Member
- Joined
- Aug 5, 2011
- Messages
- 9
- Location
- New Zealand
- Vessel Name
- Takahoa
- Vessel Make
- Pelin Crusader 42 ft
Hi
On our last trip out we noticed a rattle audible inside the aft lazarette which seems to come from the prop shaft. We hear it only at about 1500 rpm. Below that there is no noise. And as we throttle up above 1500 rpm it disappears also.
We motored home at 1900 rpm and all seemed well. I dived and checked the shaft zinc and the prop shaft itself appeared firm with no slop in the cutless bearing.
The bearing was my first guess? Then I thought it might be a loose zinc but they seem OK.
The vessel is a 10 tonne semi displacement NZ built trawler style with a CAT 3208 NA driving a 2 inch shaft.
Any thoughts appreciated!
On our last trip out we noticed a rattle audible inside the aft lazarette which seems to come from the prop shaft. We hear it only at about 1500 rpm. Below that there is no noise. And as we throttle up above 1500 rpm it disappears also.
We motored home at 1900 rpm and all seemed well. I dived and checked the shaft zinc and the prop shaft itself appeared firm with no slop in the cutless bearing.
The bearing was my first guess? Then I thought it might be a loose zinc but they seem OK.
The vessel is a 10 tonne semi displacement NZ built trawler style with a CAT 3208 NA driving a 2 inch shaft.
Any thoughts appreciated!