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  • keyman
    replied
    We also have a Mako 250 with open transom like TC. Water on deck drain thru the deck scuppers on each side of the deck which have two 1" thru transom with rubber flaps which drain directly out the stern. Your present set up only has the two 3/4" deck drains which drain into your bilge, Our fishboxes drain directly into the bilge which we modified from Mako original three shutoff valve set up thru the masecator to starboard gunnel thru hull. (Looking to add a separate fishbox drain box with pump). The holes which you show in picture were for livewell and hull drains. We added a shutoff valve in the livewell overflow drain because the scupper drain are below water level which backfilled the livewell. TC removed all old soaked foam in his project and the drains are above the waterline. Consider adding a backup bilge pump to assist in removing the additional water from the deck drains. If you were to re-install the lower transom scupper drains which would be below the waterline, which you don't want. Granted while on way the water would drain but not ideal situation.

    PS: TC - Dave how did your fishbox drain enclosure work out? I looked back at your project and saw that you added one to your bilge but didn't see any follow up on it's operation.
    Last edited by keyman; 03-28-2020, 04:38 AM.

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  • Backcharge
    replied
    The hole are 3/4” equals 1.5” total. They won’t shed much more water than a single 1”. Point is if you take let’s say 500 gallons suddenly over the rail, neither is gonna help a lot. In your boat, you would be in a better situation due to not having a enclosed transom. Honestly if I had all that weight in the boat I would much rather it be in the bilge than trying to drain it off the deck (lower center of gravity). Our boats don’t have enough freeboard to truly self bale like a commercial boat. Not trying to argue, just my thoughts.

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  • Triplecrownnc
    replied
    So this wont work?

    Cannot connect the existing deck drains to those holes without fittings in the transom? Seems like the PO had that in mind but there must be a reason he didn't finish it.

    The idea behind deck drains is to get rid of a lot of water fast in case you take a wave or something. You idea might drain water off the deck but it would be slow.

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  • Backcharge
    replied
    I never use live bait here so the baitwell is not needed. If I did use one I would rather have a portable on deck. So yes, the baitwell would drain to the bilge if ever used. The boat is always on a trailer so that wouldn’t be a big deal since the plug is always pulled when out of the water. I hate to drill anymore holes in the transom if it can be avoided.

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  • Triplecrownnc
    replied
    Originally posted by Backcharge View Post
    The sea cock in the bilge is below the waterline as is the 1” tubing. The deck drains are above the waterline. If I use the sea cock as my outlet my deck drains should not let water in because they are above the waterline. Granted there will be water in the line up to a certain point. Hope I am explaining clearly!
    That 1" line typically connects to the live well so it can be drained. You would have to disconnect that and what, have the live well drain to the bilge? Cannot connect the existing deck drains to those holes without fittings in the transom?

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  • Backcharge
    replied
    My fish box and live well drains on my bay boat. No plugs are used unless you want to keep water in

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  • Backcharge
    replied
    The sea cock in the bilge is below the waterline as is the 1” tubing. The deck drains are above the waterline. If I use the sea cock as my outlet my deck drains should not let water in because they are above the waterline. Granted there will be water in the line up to a certain point. Hope I am explaining clearly!

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  • Triplecrownnc
    replied
    A lot going on in that last pic but for sure that drain you are showing me it NOT above the water line.

    The holes in your transom looking from the rear with no fittings on them do not seem to line up with mine (either the deck drains with the black flaps on them or the drain for the live well just below it) in position, so I'd say yours have been changed. It is likely your deck drains were covered by the bracket and they did something else, including draining directly into the bilge from the top side. That plan is not a good plan and should be closed or otherwise modified. I wonder if they intended to connect the drains on the top side to the holes with no fittings on the back of the transom with tubing?

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  • Backcharge
    replied

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  • Backcharge
    replied
    Drains from inside

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  • Backcharge
    replied
    They are sleeved still. What engines do you have?

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  • Triplecrownnc
    replied
    Click image for larger version

Name:	39F2C97F-5252-4DE8-AC71-FBB09950923E.jpeg
Views:	92
Size:	3.97 MB
ID:	543610Click image for larger version

Name:	57B6F540-0247-4C09-B189-BD13276D5465.jpeg
Views:	102
Size:	2.33 MB
ID:	543609 Couple of pics of the deck drains

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  • Triplecrownnc
    replied
    I hope they didn't leave the transom core exposed, those drains are supposed to be sleeved. My deck drains consist of two side by side sleeved drain holes on each side of the boat so something is off there.

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  • Backcharge
    replied
    I guess I could use the old drains but they are pretty close to the waterline

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  • Backcharge
    replied
    The Bracket is really close to being in the way. You can see the old drains. They didn’t fill them in when they closed in the transom

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