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Author Topic:   Thru-hull replacement
outrage posted 02-10-2001 10:01 AM ET (US)   Profile for outrage   Send Email to outrage  
I need advice and "how to" instructions on how to replace the thru-hull fittings on my whaler. What tools and materials do I need? How tough is the job? Any suggestions are greatly appreciated.
bigz posted 02-10-2001 10:22 AM ET (US)     Profile for bigz    

Which ones? the sump, the motor well -- Tom

outrage posted 02-10-2001 10:26 AM ET (US)     Profile for outrage  Send Email to outrage     
I am planning to replace both. I expanded the search and saw some good ideas. How do you suggest removing the old tubes? Do you think I should use a flanging tool or a ball-peen hammer? Which is easier?
bigz posted 02-10-2001 11:04 AM ET (US)     Profile for bigz    
Take a chisel -- the auto not the wood kind and carefully chisel around the flange until you collapse it then just push it out the hole---

On the sump would replace with a heavy bronze fitting which uses a flange nut to secure (won't be totally flush inside enough that at the most a fraction of an inch of water might remain) check out Perko's site for sizing. (if I remember this one would be the 7/8 ID which has a 1" OD since I believe the brass tube in the sump is 1" OD, could be 3/4 though!)

The motor well if you want to stay with the brass tubes the flaring tool is easy to use but costly unless to can get a shop to lend one to you --- the ball pen works fine but you'll need two people ---

The alternative is the plastic drains (scuppers) which use a flange nut in lieu of the bass tube -- for the well.

Oh on the brass tubes get some o-rings, two per tube and install them -- on the one end which is preformed slide it up tight insert from inside out on the motor well and then flare the out side around the other o-ring down tight -- it you decide to go with a brass tube instead of a bronze thru-hull in the sump also use o-rings in this case insert the preformed end from the outside and then flare from the inside ---

You might want to open up the holes a fraction and then mix up some epoxy and line the hole sides with it before inserting the thru hull fittings -- this will seal the transom plywood. On the bottom wouldn't do it since foam can be harmed by uncured epoxy --- guess you could smear some 3M 4200 around in the sump hole before inserting wouldn't hurt ---

Give me a shout if you have any other thoughts or questions --- hope this helps Tom

bigz posted 02-10-2001 11:11 AM ET (US)     Profile for bigz    
Oops if you go with a bronze fitting you will need to epoxy the outer flange flush with the hull wouldn't trust a a sealant -- reason this fitting will not fully conform to the outer hull -- inside it should be fine you can seal the flange nut with 4200 -- we are only talking about a fraction that it will be off on the outside but still enough to cause problems if not sealed flush --- Tom
Outraged posted 02-10-2001 11:23 AM ET (US)     Profile for Outraged  Send Email to Outraged     
Big Z, I think we have a case of mistaken identity here,but I can see where it`s confusing as our names are very similar. I am also coincedently (sp?) facing the same project w/my 19` Outrage.I managed to borrow a flaring tool from a Whaler friend,which looks fairly easy to use. I am also thinking of looking into using PVC pipe instead of bronze because of the longevity of it vs bronze.Just cut the PVC to length needed & caulk in place. Anyone have any thoughts on this idea?
bigz posted 02-10-2001 11:36 AM ET (US)     Profile for bigz    
Umm -- I apologize Outrage and Outraged -- ok now I have it right in the old brain --

Derk (Outraged)
The Plastic would work just not on the bottom need to have a metal fitting down there -- to easy to rip up a bottom thru hull, loading or running aground, transom would be fine --- Tom

bigz posted 02-10-2001 11:41 AM ET (US)     Profile for bigz    
Batting zero today --

The PVC would have to be epoxied into place and I'd be conerned on the bottom thru hull --- it certainly can be done but a standard sealant won't do the trick same with the transom ---

Maybe this time I answered your question Outraged correctly --- just one of those days with a miserable cold to boot --- Tom

outrage posted 02-10-2001 01:47 PM ET (US)     Profile for outrage  Send Email to outrage     
Thanks BIGZ for your info. This is very helpfull. I am not sure which material I will use just yet. Probably will depend on availability of a flange tool.
Outraged posted 02-10-2001 02:35 PM ET (US)     Profile for Outraged  Send Email to Outraged     
Big Z, Thanks for your advice! I`ll probably go with the bronze tube that it had originally. Hope you feel better soon. Outraged
george nagy posted 02-13-2001 01:59 PM ET (US)     Profile for george nagy  Send Email to george nagy     
I used a bronze threaded thru hull on the bottom cockpit drain. It comes very close to being rubbed when I put the boat on the trailer. As for plastic on the transom it could be ok but I would use bronze, or chrome over bronze, it just looks better and will last forever(just like your whaler). I got mine at west marine it was the right depth and everything I think it was around $9. I was going to use the OEM brass tube, but figured it didn't last more than 12 years so whay have to do it again in another 12. Yeah right! Besides the flange tool I got from my dealer was incorrect and they told me there were no gromits originally, Imagine that the dealer was wrong! Well my whalers get abuse in salt water and they love it! This retrofit will make them good for another 12+ years. good luck!

P.S. my tube was hard to get out, be patient!

Arch Autenreith posted 02-13-2001 03:04 PM ET (US)     Profile for Arch Autenreith  Send Email to Arch Autenreith     
I ended up putting on the plastic because the Whaler dealer was a 7+ hour 'round trip to have them use their flaring tool for the original tubes. I looked high and low for a screw-type thru hull long enough for the rear drain (about 8"?) to no avail. Anyhow, the plastic is perfect but it was a lot of work and would have definitely done it your way if I had found what you used. This isn't my first or last Whaler and will be sure to use your method next time. Avail at West Marine?

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