Piriapolis, Boatyard Day 1
22/07/11 23:49 Filed in: Uruguay | Maintenance
I was down at the yard by 09:30. There is quite a lot to do before our target launch date of Friday 5th August. Major work is being carried out by local contractors, Imperial Yachts.
The shaft coupling, nicely shot blasted, was back on board having been modified to ABYC (American Boat and Yacht Council) standards. At build the shaft was secured within the coupling by four allen bolts and a rolled pin locating in an indent on the shaft.
After the first failure, in 2006, a grub screw was added and a new rolled pin fitted by a Yanmar dealer in Dartmouth. This, I was assured, would solve the problem.
It did until December 2010 when the coupling failed again. My temporary repair held until April this year in Piriapolis.
A proper analysis revealed that the rolled pin and indent barely matched. Only a small part of the pin diameter was locating in the indent. Modifications included properly matching the pin and indent and machining a woodruff keyway in the shaft and coupling. The shaft was tested and found to be true.
I applied the first of four coats of paint to the shaft coupling. Laurence and Elisa made excellent progress stripping the below waterline hull back to the gelcoat. They were using Bahco 650 Ergo scrapers and were finished by the end of the day.
I was extremely impressed with the Bahco 650 scrapers.
I had not seen Kiriwina stripped back to gelcoat. The hull was in excellent condition although I was surprised to see a number of somewhat agricultural examples of GRP work most likely dating from when she was built.
The shaft coupling, nicely shot blasted, was back on board having been modified to ABYC (American Boat and Yacht Council) standards. At build the shaft was secured within the coupling by four allen bolts and a rolled pin locating in an indent on the shaft.
After the first failure, in 2006, a grub screw was added and a new rolled pin fitted by a Yanmar dealer in Dartmouth. This, I was assured, would solve the problem.
It did until December 2010 when the coupling failed again. My temporary repair held until April this year in Piriapolis.
A proper analysis revealed that the rolled pin and indent barely matched. Only a small part of the pin diameter was locating in the indent. Modifications included properly matching the pin and indent and machining a woodruff keyway in the shaft and coupling. The shaft was tested and found to be true.
I applied the first of four coats of paint to the shaft coupling. Laurence and Elisa made excellent progress stripping the below waterline hull back to the gelcoat. They were using Bahco 650 Ergo scrapers and were finished by the end of the day.
I was extremely impressed with the Bahco 650 scrapers.
I had not seen Kiriwina stripped back to gelcoat. The hull was in excellent condition although I was surprised to see a number of somewhat agricultural examples of GRP work most likely dating from when she was built.