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 Plumbing a 1980 MAKO 25
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NeptuneGreenRoom
Member

USA
74 Posts

Posted - 05/08/2006 :  12:00:09  Show Profile  Reply with Quote
I seem to be having some issues figuring out the operation of the plumbing in my 1980 M25. To start, I have a thru hull fitting on the stern that allows water from my aft in deck fish box to drain through a 1 1/4" hose passes a ball valve and passes the fitting into the ocean. Only problem is when I leave the ball valve open, sea water enters through the same way it leaves and there is no way to drain the fish box when at the dock. Any advice on how to re-plumb this thing?

1980 MAKO 25
twin 2003 DF140's
Shark River Inlet, NJ

tcarouge2
New Member

17 Posts

Posted - 05/08/2006 :  14:06:21  Show Profile  Reply with Quote
I would just leave the valve open, and then run the boat fast, it will suck the water out. Then just close the valve before you return to dock.



Ocean City Maryland
22' 4"
93 Evinrude 225
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NeptuneGreenRoom
Member

USA
74 Posts

Posted - 05/10/2006 :  08:14:31  Show Profile  Reply with Quote
that'll certaintly work I guess, althought the two ball valves are located in the bilge under the engine well hatch, not easily excessible when running the boat fast. What I'm going to do is disconnect both the hose lines running from the bait and live wells and let them dump directly into the bilge. I'll keep them plugged within the boxes to regulate the flow in and out. Thansk for the advice.

1980 MAKO 25
twin 2003 DF140's
Shark River Inlet, NJ
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tsawyer
Member

USA
390 Posts

Posted - 05/10/2006 :  13:01:15  Show Profile  Reply with Quote
I'm got the same setup. I'm going to rework it so that the fishbox connects to a macerator pump and goes out.

It's not a big problem at home, cause I just put it on the lift and drain it. But, after a couple of fishy days in the islands, the flies get to me and I can't take the smell.

Tom
Pompano Beach, Florida
1976 25' Mako
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Holy Smoke
Member

USA
180 Posts

Posted - 05/10/2006 :  14:22:16  Show Profile  Reply with Quote
I have the same deal except I have a macerator pump plumbed in the system.

On the trailer I leave the fishbox drain valve open, in the water I close it and let the pump drain it.
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Stefan
Member

225 Posts

Posted - 05/10/2006 :  14:25:41  Show Profile  Reply with Quote
I guess you could put a nylon thrull in the fish box, mount a Rule bait pump to that and then pump it out, you'd have to watch for scales and other stuff that can get hung up in the pump though!

Stefan, San Pedro Calif. 1985 Mako 224 CC, Yamaha 225 SS II, Furuno 600L , Furuno 1623 Radar, Furuno 1610 GPS
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hookshot
Member

500 Posts

Posted - 05/10/2006 :  14:34:44  Show Profile  Reply with Quote
What Holy Smoke said. It's a poor design in that these boxes won't drain except on plane. I close the main outflow valve and pump out with the macerator pump which is labeled "self-priming macerator pump" but in fact needs priming to work.


1992 Mako 241
2000 Yamaha 150 HPDI's
Holden Beach, NC
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gmcauliffe
Member

USA
1580 Posts

Posted - 05/10/2006 :  14:40:15  Show Profile  Visit gmcauliffe's Homepage  Reply with Quote
I'm in the middle of this project and will post pics soon. What I've done is to cut out the pvc pipe, cap the transom drains, and inside the bilge, attach hose to the drain pipes so that they drain into a sump box. That has a float switch within, and will pump itself out as needed. You can buy or make a sump box.



NYC & L.I. - 1974 "Classic" Mako 20' - Suzuki 2006 DF150 - Fly & Light Tackle, C&R
My boat: http://www.classicmako.com/forum/topic.asp?TOPIC_ID=23444#159594
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