Screw drilled through hull bottomby Rudder. Post


KTMsailor
 

I’ve been chasing a trickle of a leak that creates a constant puddle in the bilge. I finally tracked it down to a screw the PO drilled thru a 2x2 wooden stringer he placed under a plywood shelf to support the start battery located just aft and starboard of the rudder post under the starboard lazzeret.  The boat is in the water  is in the water as being self frequently .   Remove the crudely built battery support and install glass in a proper battery support system while doing it see you off the screw hole all the while the boat still in the water
 I asked the folks at the marina if it was possible to seal off the leak and glass over the area successfully.  they were not very optimistic and told me the boat would have to be hauled and repaired on the hard
 I can’t really tell if at this point if it was a stainless screw or a carbon screw allthough the  screw head is definitely rusty.
  Any thoughts on how to remedy this week so I can glass in the new battery box would be very helpful
thanks in advance
--
Mark Wilkinson
Great Escape
400 MK II- Hull # 312


nick walker
 

Ouch, that's nasty.  Mark, you may be able to seal the hole temporarily using some sealant and a new stainless screw until your next lift out but to do a proper, permanent repair, it will almost certainly need to be done out of the water so the hole can be cleaned out and dried properly before filling with something like resin or epoxy.

That is a long run for the cables for a start battery though.  I've put in a spiral wound, sealed battery (https://www.optimabatteries.com/products/bluetop) under the bed alongside the muffler in the rear cabin.   I bedded in a thick marine ply base on Sikaflex and coated it with flow coat for the battery to sit on.  The Sika over an area of roughly a square foot will hold some impressive loading so the battery is clamped down straight to the board with a couple of chocks to stop it sliding anyway. 
Could save you some lazarette space, reduce the risk of damage to the battery and or cables and shorten the cable runs for your starter.
All REDTOPs (except the 6V) & all YELLOWTOPs (except the DH6, 51, DS46B24R, 27 & 31) come with a variety of adapters for fitment. While OPTIMA doesn't offer what we consider to be 'direct-fit' replacements for every vehicle, many owners have successfully used our products in applications that we would consider to be 'custom fitments.'
www.optimabatteries.com

Food for thought...

Good luck sealing that hole.

Regards,
Nick
Divided Sky (C400 Mk II, #232)
Fremantle, Western Australia.


From: C400@Catalina400-445.groups.io <C400@Catalina400-445.groups.io> on behalf of KTMsailor <mwilkinson@...>
Sent: Tuesday, 22 June 2021 8:40 AM
To: C400@Catalina400-445.groups.io <C400@Catalina400-445.groups.io>
Subject: [C400] Screw drilled through hull bottomby Rudder. Post
 
I’ve been chasing a trickle of a leak that creates a constant puddle in the bilge. I finally tracked it down to a screw the PO drilled thru a 2x2 wooden stringer he placed under a plywood shelf to support the start battery located just aft and starboard of the rudder post under the starboard lazzeret.  The boat is in the water  is in the water as being self frequently .   Remove the crudely built battery support and install glass in a proper battery support system while doing it see you off the screw hole all the while the boat still in the water
 I asked the folks at the marina if it was possible to seal off the leak and glass over the area successfully.  they were not very optimistic and told me the boat would have to be hauled and repaired on the hard
 I can’t really tell if at this point if it was a stainless screw or a carbon screw allthough the  screw head is definitely rusty.
  Any thoughts on how to remedy this week so I can glass in the new battery box would be very helpful
thanks in advance
--
Mark Wilkinson
Great Escape
400 MK II- Hull # 312