Topic : NSM4 Stern Tank

Has anyone modded the stern tank on a Rowsell NSM4 to assist drainage in any way?

Posted: 05/11/2005 17:50:44
By: Jon
I've seen a hoare NSM4 with two plasic drain tubes and small transom flaps but don't know if it worked or not.

Getting them leakproof could prove interesting though.

Posted: 06/11/2005 11:57:41
By: Chris M
I put a couple of white plastic drain pipes through the stern tank of a plastic NSM II I had. Pictures at

Posted: 06/11/2005 13:57:11
By: Nick Price
Brian Cobb has cut the stern tank from 3316 (a Summer Wine I think) cutting the wooden tank almost to the floor of the hull, adding a filler piece to the transom which had a large cutout above the level of the tank, adding flaps to the stern, and adding bags.

We have 3361 which was I think the first NSM4, built by Jon Turner. It has bags and flaps from new; if a few photos would help you please let me know

Posted: 06/11/2005 22:05:39
By: Chris 3361
Cutting the tank out is a little drastic really, and it must be remembered it's a very strutural part of the boat!

Only recommended if the tank is badly holed.

Posted: 07/11/2005 07:12:00
By: Chris
No, tank not holed.  although some nutcase did put additional bags on it which required some axtra ugly wood being glued to it.

2 Problems are....

1) Boat never really drains when we park it up - even if I leave it level, water collects around the bailers and doesn't drop through.
2) When we have a bad tack in heavy weather and lug a load of wet stuff in, it takes a while to clear thru the bailers and the tranny flaps.

Probably won't go for major surgery - I don't want to end up having a tearful phone call to phil scott.

Posted: 07/11/2005 08:07:10
By: Jon
I think Phil put the tubes in the Hoare NSM IV.

That would certainly solve the dinghy park drainage problem.

Posted: 07/11/2005 08:32:50
By: Chris
3405.  I had Phil Scott put pipe and plugs through the tank.  Just helped drain the water but did not help self bail after capsize.


Posted: 07/11/2005 09:49:35
By: Midland Circuit Chap
My NSM2 had stern pipes which did not help drain when stood but it emptied like a shoot after capsize!

Posted: 07/11/2005 14:35:09
By: Jeremy3550


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