modified malahini

Designs for inboard or outboard power

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TomB
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Re: modified malahini

Post by TomB » Mon Sep 23, 2019 8:37 am

Bryan,

One more thing to ponder...your garden hose probably puts out 24 gpm, an 800 gph puts out 13 gpm...do you want that much volume hitting your motor well? As often as the pump will run, does it matter?

Tom

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DrBryanJ
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Re: modified malahini

Post by DrBryanJ » Mon Sep 23, 2019 9:16 am

I believe others have drained their bilge pump into the motor well without problems. I'd rather not put another hole in the hull.
Bryan

Building a malahini "Mona Lisa"

My wife said "If I build a boat, she's getting a divorce."

TomB
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Re: modified malahini

Post by TomB » Mon Sep 23, 2019 1:29 pm

I hate holes too.

My fishing boat sends the bilge (unknown flow rate) through a hole in the side and the live well goes into the motor well. My motor well is shallow at the front and just deep enough at the transom to clear the motor. I rinse the deck regularly and it drains to the bilge. Most of the time I use the drain plug to get the water out, sometimes I use the pump to check that it works. Luckily, I've never been forced to use the pump on the water.

An 800 GPH pump into the well should work ok as long as you don't get crazy with well geometry (my boat for example). A 2000 GPH pump on the other hand would hit the motor well like a fire hose and spray water everywhere. (dripping wet emoji goes here :D )

Tom

hoodman
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Re: modified malahini

Post by hoodman » Mon Sep 23, 2019 5:28 pm

I like a pump that has an internal float like the one Matt showed. The float is inside the strainer so it won't get hung up on some debris in the bilge. I used a blob of 3m 4200 on the inside of the hull and pushed the pump strainer into it. Once that cures you can snap the pump into the strainer. The pump has stayed put for a year now with no screws holding it down.
Matt

Building a Geronimo......!
viewtopic.php?f=2&t=25139

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mrintense
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Re: modified malahini

Post by mrintense » Mon Sep 23, 2019 6:31 pm

Everything I've read says that you can reliably expect about 50% of the rated output from bilge pumps when other factors such as hose length, internal smoothness, and rise height are factored in. I elected to go with 1100 GPH pumps and will have four of them. Hopefully the most drama I will ever have is replacing them! :D :D
Carl
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Crafting a classically styled Vera Cruise

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Bill Edmundson
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Re: modified malahini

Post by Bill Edmundson » Tue Sep 24, 2019 6:50 am

Pumps are rated with a short smooth hose discharging 1 foot above the pump.

I have 3-300 gph Rule pumps in the Tahoe. It has 3 separate compartments. I have float and manual switches.

I have 6-500 gph Rule pumps in the Bartender. It has 2 separate compartments. Float and manual switches.

Bill
Mini -Tug, KH Tahoe 19 & Bartender 24 - There can be no miracle recoveries without first screwing up.
Tahoe 19 Build

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DrBryanJ
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Re: modified malahini

Post by DrBryanJ » Fri Nov 01, 2019 7:28 am

I haven't been posting much, but I have been working on the boat. Not much to show, just lots of little things and prepping for other things.

I did install my drain tubes yesterday.

Before I painted the boat, I cut over sized holes and filled them with thickened epoxy. I put little dimples in the center of the epoxy so I could find it after painting. I drilled the correct size holes through the epoxy and recoated the inside with epoxy.
drain tubes cut.jpg
I cut the drain tubes to size (1/4 inch protruding from the hole.) I used my plumbing pipe cutter which worked nicely. While looking on the internet for instructions , I saw recommendations to soften the brass. I heated the tubes to red hot and dropped them in water.

Before placing in holes, I coated the inside of the holes and outside of the tubes with 4200. I used a Moeller flanging tool to flange the tubes. I was going to make my own with bolts and washers, but West Marine had them for about $12 so I got one. I think they came out pretty good.
draintubes in.jpg
Since I have the flanging tool, if anyone near me needs one, it is available. I will just need it back when I work on my motor well. Just PM me
Bryan

Building a malahini "Mona Lisa"

My wife said "If I build a boat, she's getting a divorce."

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mrintense
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Re: modified malahini

Post by mrintense » Fri Nov 01, 2019 11:54 am

Looking good Bryan. These are the same type I currently have. I have one of those flaring tools as well. Was given to me by another boat builder out here in my area.
Carl
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Crafting a classically styled Vera Cruise

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DrBryanJ
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Re: modified malahini

Post by DrBryanJ » Sat Nov 02, 2019 4:41 pm

Here are other things I've accomplished.

I build he battery compartment which will be under the middle of the rear seat.
unnamed (12).jpg
I made a tray for the batteries to sit on
unnamed (1).jpg
And I got two battery boxes which can hold a group 24 to a group 31 battery.
unnamed.jpg
I haven't decide on one or two batteries, but now it is set for either option.
Bryan

Building a malahini "Mona Lisa"

My wife said "If I build a boat, she's getting a divorce."

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DrBryanJ
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Re: modified malahini

Post by DrBryanJ » Sat Nov 02, 2019 4:46 pm

I installed a small negative bus bar near the battery compartment of electrical items in the stern of the boat
unnamed (2).jpg
I installed support blocks for my bilge pumps
unnamed (3).jpg
and I installed the bilge pumps
unnamed (4).jpg
I wanted to do this before I built the motor well so I don't have to climb under. (I hope I don't screw them up while they sit there.)
Bryan

Building a malahini "Mona Lisa"

My wife said "If I build a boat, she's getting a divorce."

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Bill Edmundson
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Re: modified malahini

Post by Bill Edmundson » Sat Nov 02, 2019 4:48 pm

Bryan

I did the same thing. I ran a year or so with one then put the second in. It was a waste of money.

Bill
Mini -Tug, KH Tahoe 19 & Bartender 24 - There can be no miracle recoveries without first screwing up.
Tahoe 19 Build

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DrBryanJ
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Re: modified malahini

Post by DrBryanJ » Sat Nov 02, 2019 4:59 pm

My dad's boat only had one battery and we would fish all day without a problem. Of course when we fished, we didn't list to tunes all day. I'm sure that will be a different story with Lisa and my kids aboard. We also didn't have phones to charge and fish finders/chart plotters. I still haven't decided.
Bryan

Building a malahini "Mona Lisa"

My wife said "If I build a boat, she's getting a divorce."

Hercdrvr
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Re: modified malahini

Post by Hercdrvr » Sat Nov 02, 2019 7:35 pm

Moving right along there buddy. Looks good.
Matt B

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Re: modified malahini

Post by bstrong » Sat Nov 02, 2019 9:50 pm

Looking Good!!! :D

hoodman
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Re: modified malahini

Post by hoodman » Sun Nov 03, 2019 7:43 pm

Lots of room under the floor with that deep v. Looking good.
Matt

Building a Geronimo......!
viewtopic.php?f=2&t=25139

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