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Old 06-03-2023, 18:34   #16
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Re: What's this thing and why is it in my head?

Black-seltzer-water maker.
Bad jokes aside, please let us know once you have this thing run through 12v!
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Old 06-03-2023, 20:14   #17
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Re: What's this thing and why is it in my head?

Looks like a compressor for air horns?
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Old 07-03-2023, 00:33   #18
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Re: What's this thing and why is it in my head?

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Originally Posted by garyfdl View Post
Pump/compressor. Possibly for flush water or aerating the holding tank?(Although I admit I don't know why you would want to do that).

What is the corroded piece at the bottom of the picture, that the hose goes into, and is it connected to anything?
Aerating the holding tank is a good idea. It encourages aerobic bacteria and reduces odors. Groco makes a device for doing just that.
https://www.groco.net/products/marin...dor-prevention
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Old 07-03-2023, 00:52   #19
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Re: What's this thing and why is it in my head?

If it was on a larger boat with a Gardner 8LX engine and the original mechanical gearbox with an pneumatic assist ram to operate the shift lever Iíd suggest that was the reason you have that ďcompressor/ vac pump but since your boat is a Westsail 28 itís unlikely you have this power plant.
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Old 07-03-2023, 08:57   #20
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Re: What's this thing and why is it in my head?

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What is the corroded piece at the bottom of the picture, that the hose goes into, and is it connected to anything?
Some kind of fitting that's not connected to anything. When I'm back at the boat in a couple days I'll take the whole thing off and get a better look.
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Old 07-03-2023, 14:31   #21
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Re: What's this thing and why is it in my head?

Looks like an air compressor that plugs into a lighter port without the plastic covering on it.
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Old 07-03-2023, 14:47   #22
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Re: What's this thing and why is it in my head?

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Aerating the holding tank is a good idea. It encourages aerobic bacteria and reduces odors. Groco makes a device for doing just that.
https://www.groco.net/products/marin...dor-prevention
LOL I would have thought that pumping air in would push the 'stink' out.
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Old 07-03-2023, 15:02   #23
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Re: What's this thing and why is it in my head?

Since it's a pump and the hose is "SAE 30R7 Fuel Line Hose - Recommended for low pressure/high temperature fuel"


I'd make a WAG that it may have been fitted with a filter and return line and used for a fuel polisher.


Can you trace the wiring back and see if it goes to a labelled switch somewhere?
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Old 07-03-2023, 15:09   #24
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Re: What's this thing and why is it in my head?

Definitely an air compressor - only thing I can think of is that if you put a sensitive pressure gauge on the airline and then run it to the bottom of the tank, it would tell you how full the tank is.


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Old 07-03-2023, 15:25   #25
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Re: What's this thing and why is it in my head?

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Since it's a pump and the hose is "SAE 30R7 Fuel Line Hose - Recommended for low pressure/high temperature fuel"


I'd make a WAG that it may have been fitted with a filter and return line and used for a fuel polisher.


Can you trace the wiring back and see if it goes to a labelled switch somewhere?
Not a bad guess, but seems odd that it would (presumably) be so far from the tank. Then again, it is a boat...
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Old 12-03-2023, 16:25   #26
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Re: What's this thing and why is it in my head?

Definitely an air pump (and it still runs!). The fitting on the end of the hose looks like it fits a standard Schrader tire valve. The wires ran to an unlabeled toggle switch (which was so corroded it fell apart when I touched it) taped in a cabinet above, which in turn ran to the cabin lighting circuit. Why it was there I may never know, but it resides in the trash now.

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Old 12-03-2023, 16:32   #27
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Re: What's this thing and why is it in my head?

Did the boat have a diesel heater in it? I have a Force 10 heater that has a pressurized fuel tank on it. I use a bicycle pump but could see why that pump would work. They're also used as air horn compressors but not typically with a schraeder end on it.

You could leave it in and label it "GNDN" ala Star Trek.
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Old 12-03-2023, 16:50   #28
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Re: What's this thing and why is it in my head?

Air pump for blowup toys?
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Old 12-03-2023, 16:56   #29
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Re: What's this thing and why is it in my head?

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Definitely an air pump...

Why it was there I may never know, but it resides in the trash now.
You threw it away?!?! That's a 'good' piece of jun... er, stuff!
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Old 12-03-2023, 18:01   #30
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Re: What's this thing and why is it in my head?

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Did the boat have a diesel heater in it? I have a Force 10 heater that has a pressurized fuel tank on it. I use a bicycle pump but could see why that pump would work.
It did actually have a kerosene or diesel heater in that same area that was removed by the previous owner!
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