Author Topic: Knock under boat  (Read 5605 times)

jimma4191

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Knock under boat
« on: June 23, 2018, 10:18:17 PM »
Hi and thanks for having me. On my 1987 P33-2 Sailing today. Four to six foot seas on the starboard quarter. Lots of steering and playing the helm. I would surf and need to fight the bow down. As soon as I released the load on the helm and turn back to starboard I would get a knock from under the boat. Initially I thought it was something rolling around somewhere but now realize it is perfectly synced with this action and seemingly this one point of sail and conditions. I recently did a routine inspection on the quadrant and cables. Nothing to see there. I now have rudder worries. I just launched a week ago and in the previous week and did a simple lift test on the rudder. Nice and tight with no noticeable movement. Any thoughts would be greatly appreciated. Thanks,     Jim

Dolce_Vita

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Re: Knock under boat
« Reply #1 on: June 24, 2018, 12:33:27 PM »
Check inside the Edson steering pedestal, and under the deck at the base of the pedestal for worn components along the steering cable path.  Pay particular attention to the clevis pins in the idler sheaves at the base that accomplish the 90 degree turn of the cables.  If these are the older bronze ones, they can wear an astonishing amount!  Edson now recommends stainless clevis pins in this location.

(Photo credit: Scott Rosenthal)

« Last Edit: June 24, 2018, 12:36:05 PM by Dolce_Vita »
@(^.^)@  Ed
1977 P-323 #42 "Dolce Vita"
with rebuilt Atomic-4

jimma4191

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Re: Knock under boat
« Reply #2 on: June 25, 2018, 08:21:32 PM »
This is the best lead I've had. I will look very closely. Thank you. I'll bet that's it. Is it a DIY repair?
« Last Edit: June 25, 2018, 09:25:37 PM by jimma4191 »

Rusty Pelican

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Re: Knock under boat
« Reply #3 on: June 26, 2018, 08:01:57 AM »
My guess it is a loose Zinc on the shaft.
Have you checked it?

Dolce_Vita

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Re: Knock under boat
« Reply #4 on: June 28, 2018, 11:14:27 AM »
This is the best lead I've had. I will look very closely. Thank you. I'll bet that's it. Is it a DIY repair?

The repair is easy.  Access is the problem.  Its a PITA to get to.
@(^.^)@  Ed
1977 P-323 #42 "Dolce Vita"
with rebuilt Atomic-4

Alma

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Re: Knock under boat
« Reply #5 on: June 30, 2018, 05:21:02 PM »
LoL- I'd much rather replace bronze pins every 10 years than those pulleys- They're pricy. I'll likely put new bearings in mine when I get to them.