Replacing below the waterline thru-hull fittings and seacocks during next haul

[SouthernNomad]

Hello Fellow CP27 Owners,

I'm pulling the boat to paint the bottom and wax the hull. During this time, I would like to replace the thru hull fittings (2) and seacocks (2)  below the waterline using the logic that the boat is 24 yrs old and I'm pretty sure they have never been replaced.

If any of you could help, what are the correct sizes for the two standard thru-hulls and what are the best fittings and seacocks out there for the money?

This is also my first time hauling the boat for this type of maintenance. Are there any precautions I should look out for when hauling? Are there other items I should look at and possibly replace while the boat is on the hard? (Zincs, ....)

Finally, Which adhesive should I use when replacing them? 4200? 5000?

Thank you for your help,

SouthernNomad

[MacGyver]

Fresh or Salt water?

Mac

[deisher6]

Hey SouthernNomad:

I only know of two zincs on the C-17.  The main zinc is on the propshaft between the cutlass bearing and the prop.  The other zinc is a pencil zinc in the port end of the heat exchanger.

I noticed that the mechanic whom installed the new shaft log in OTTER grounded the electrical system on the shaft log.  It seems like a pretty good idea to me.  I do not think that mine is grounded to the outside of the log.

I cannot help you out on the through hulls.  I have discovered that If I want to update the knot/log and the depth instruments (both are analog), I am going to have to install new through hulls.  Each company seems to use different size fittings.

regards charlie

[wes]

Nomad - I would rebed but not replace. If yours are Marelon like mine (1988) they basically last forever. I would rebed with 4200, but I'm sure I'll get an argument or two about that.

Wes

[capt_nemo]

SouthernNomad,

If you have REAL seacocks and not gate valves, and are not experiencing any problems with their function (or bedding) just leave them alone and spend your time, effort, and money on something that really matters. Same comment on the thru hulls. "IF IT AIN'T BROKE, DON'T FIX IT!)

These items, when properly installed and maintained, can last as long as the boat does.

Opinion based on ownership of large boats for many years with lots of thru hulls and "proper" seacocks.

capt_nemo

[SouthernNomad]

I didn't mention it earlier, but that you for your replies!