How watertight are scuppers?

[freddofrog]

Hi all

The rear end of my 5.2m KC sits quite low. I assume this is because I have heavier motors than normal (90hp yammie 2st). Problem is in anything other than a flat sea, water comes in through the rear drain holes and you end up standing in water all day long.

Short of getting lighter motors or to somehow increase the rear end buoyancy I’m thinking of enlarging the drain holes and installing some scuppers to keep the water out, eg these Whitworths ones http://www.whitworths.com.au/main_it...AbsolutePage=1

What do you guys think?

Ta
Shane

[mirage]

Re: How watertight are scuppers?

Don't bother. Even with "normal" weight engines you still get wet feet at the back of the boat occasionally. That's just how they are.

[Alchemy]

Re: How watertight are scuppers?

Shane,

Don't bother. I've got that type on my Fisher and they do not seal well enough to keep all water out.

Regards,
Dave.

[finding_time]

Re: How watertight are scuppers?

Dont bother!!! Seriously there fine, they all do it even with 60's wait till you start backing down on a fish in any sea it get shin deep down there!

Ian

[leezor]

Re: How watertight are scuppers?

yep, mine is exactly the same so wouldn't bother!

[Dean1]

Re: How watertight are scuppers?

Make sure both your pods and rear bulkheads at the back of your deck are bone dry. I check mine regularly ( spin out the spinouts with a pair of multigrips handles in the slots) coz if you have any water in either of those areas it will cause the rear end to sit lower than normal. My plastic spinouts in the rear of the deck got broken while fishing and ended up with a half a foot of water in there all day a while back. Ally ones fixed that drama! Lucky they have bulkheads!!!

[stephen john ingle]

Re: How watertight are scuppers?

I am bringing in a pair of South african made scuppers that operate on a rubber ball ,size of a tennis ball,that float up and block incomming water.I have been unable to find similar in Australia.They work well and will be fitted to my 17 ft cat that I am fitting out.Contact me if you want a pair and I will get them sent with mine.

[CB77]

Re: How watertight are scuppers?

Hi, You mentioned it sits low in the water?

I have heard of Cats with foam flotatation in the sponsons can get water logged over the years, which adds a lot of weight.

I had a mate with a shark cat a few years ago, the cat leaned slightly at rest to one side in the water, turned out to be water logged foam in the right sponson.

[finding_time]

Re: How watertight are scuppers?

It wont be foam,(there will be no foam in it) It's just the floor is low ( as it should be!!!) all get water in them when a few fishermen move down the back, freddofrog has bigger motors than most so it will sit lower! Kittycat had honda 75's on the back of his and they weighed close to a 1000kg each everytime he left the helm he had to stop and don a mask a snorkle!

Ian

[hinchy]

Re: How watertight are scuppers?

I am bringing in a pair of South african made scuppers that operate on a rubber ball ,size of a tennis ball,that float up and block incomming water.I have been unable to find similar in Australia.They work well and will be fitted to my 17 ft cat that I am fitting out.Contact me if you want a pair and I will get them sent with mine.

Hi

You can source these or a slightly smaller version of these from BLA.Have got to tell you though that they will still let a bit of water in as at times small particles of grit etc lodge in the seal area and allow water in.

Kind regards
Hinchy

[Mindi]

Re: How watertight are scuppers?

My UB580 Yamaha only had a single 90HP 2 stroke and you were always paddling at the back of the boat...after a while I saw it as a design feature to keep your feet cool but the flatties swimming around on the floor were a worry with the bare feet..!

[STUIE63]

Re: How watertight are scuppers?

I tried a few different scuppers and the one I found that worked best was http://www.bla.com.au/index.php?fn=p...672b967ad41a2b
but I didn't try the one suggested earlier
Stuie

[Noelm]

Re: How watertight are scuppers?

you would be pretty hard pressed to find a Motor lighter than a Yamaha 90HP, to answer your question about how water tight scuppers are, the simple answer is "not very" they don't have to be, they should not be in the water (I know, but lots of times they are) as mentioned make sure everything is dry in the pods, and the Boat hull itself, other than that, buy some Gumboots and put up with it. OH and be very careful saying negative things about a 5.2KC on here, you may incite a lynch mob!

[Matt_F]

Re: How watertight are scuppers?

Stuie,

How do those scuppers go letting water out (off the deck)? Looks like they stop it going both ways.

[Matt_F]

Re: How watertight are scuppers?

Also, Why don't boat manufacturers build the boat so that the floor is 50 or even 75mm higher? Does this create other problems? I have often wondered as this seems a common problem with most boats that have self draining decks.

Cheers