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03-28-2017, 10:24 PM
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#1
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Guru
City: Wilmington, NC
Vessel Name: DreamQuest
Vessel Model: Prairie 36
Join Date: Jan 2016
Posts: 550
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Raw Water Pump Lube Thingy?
This is on both of my Perkins 6.354 raw water pumps. Opposite end of the impeller. It's got a zirc fitting for lubrication and two wires coming from the cylinder. I haven't traced the two wires to see where they go yet, but thought someone might know what this thing does off the top of their head? I can't read anything on the label.
Sorry about the sideways pics. My iPhone always does this even if I rotate them.
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03-28-2017, 10:40 PM
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#2
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Enigma
City: Slicker?
Join Date: Oct 2007
Posts: 16,540
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Greetings,
Mr. F. In lieu of any other opinion, yes it's a thingy...
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RTF
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03-28-2017, 10:51 PM
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#3
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Guru
City: Miami Florida
Vessel Name: Possum
Vessel Model: Ellis 28
Join Date: Aug 2011
Posts: 5,299
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My first thought was a solenoid of some sort but no idea what it might do. It also looks like a tachometer drive, but that doesn't seem right either.
I'll be following this thread with interest.
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Parks Masterson
Retired from Hopkins-Carter Marine Supply
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03-28-2017, 10:54 PM
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#4
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Guru
City: Miami Florida
Vessel Name: Possum
Vessel Model: Ellis 28
Join Date: Aug 2011
Posts: 5,299
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The second photo is looking down on it with the red cap removed?
I'm back to tachometer drive.
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Parks Masterson
Retired from Hopkins-Carter Marine Supply
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03-28-2017, 11:09 PM
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#5
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Guru
City: Wilmington, NC
Vessel Name: DreamQuest
Vessel Model: Prairie 36
Join Date: Jan 2016
Posts: 550
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Quote:
Originally Posted by HopCar
The second photo is looking down on it with the red cap removed?
I'm back to tachometer drive.
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Yes. Second photo is with red cap removed.
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03-29-2017, 03:00 AM
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#6
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Guru
City: Sydney
Join Date: Jul 2015
Posts: 1,646
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following with interest
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03-29-2017, 05:28 AM
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#7
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Guru
City: Fort Myers, FL... Summers in the Great Lakes
Vessel Name: Slow Hand
Vessel Model: Cherubini Independence 45
Join Date: Dec 2010
Posts: 12,818
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Sure looks like a tach drive. If the wires are plugged into it, remove the plug, start the engine and see if the tach works.
Ted
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03-29-2017, 06:14 AM
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#8
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Guru
City: Cape May, NJ
Vessel Name: Irish Lady
Vessel Model: Monk 36
Join Date: Dec 2007
Posts: 4,947
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Looks like a tach drive for a Glendinning Synchronizer
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Archie
Irish Lady
1984 Monk 36 Hull #46
Currently in Cape May, NJ
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03-29-2017, 06:32 AM
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#9
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Guru
City: Sarasota/Ft. Lauderdale
Join Date: Apr 2014
Posts: 5,438
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You sure they are on your raw water pumps?
I agree they look like tach drives.
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03-29-2017, 06:32 AM
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#10
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Guru
City: Ft Pierce
Vessel Name: Sold
Vessel Model: Was an Albin/PSN 40
Join Date: Oct 2011
Posts: 28,119
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Quote:
Originally Posted by High Wire
Looks like a tach drive for a Glendinning Synchronizer
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Agree.......
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03-29-2017, 09:02 AM
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#11
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Senior Member
City: New Tazewell
Vessel Name: Saoirse
Vessel Model: 1983 Nauticat 44 Ketch
Join Date: Mar 2017
Posts: 151
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I'm going to take a real swag and if it is indeed connected via a shaft to your impeller, perhaps it is some way to prime the salt water side without running the entire engine?
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03-29-2017, 10:29 AM
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#12
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Guru
City: La Conner Wa.
Vessel Name: Sea Fever
Vessel Model: Defever 49 RPH
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Posts: 877
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Perhaps a devise that shuts down the engine if no water flow?
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03-29-2017, 11:01 AM
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#13
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Guru
City: Miami Florida
Vessel Name: Possum
Vessel Model: Ellis 28
Join Date: Aug 2011
Posts: 5,299
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It is definitely designed to accept a tachometer cable under the red cap.
It doesn't seem to be connected to the pump. In fact it looks like it's placed to make it difficult to change the impeller.
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Parks Masterson
Retired from Hopkins-Carter Marine Supply
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03-29-2017, 11:16 AM
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#14
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Guru
City: Miami Florida
Vessel Name: Possum
Vessel Model: Ellis 28
Join Date: Aug 2011
Posts: 5,299
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I think Highwire nailed it. I found a picture of the piece with the grease fitting on the Glendinning website. Rotary Drive Components - Glendinning Products
My guess is that the black part is a tach generator that allows a mechanical tach cable to attach as well. The synchro would use a mechanical cable and the tachometer would us the electrical signal.
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Parks Masterson
Retired from Hopkins-Carter Marine Supply
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03-29-2017, 11:56 AM
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#15
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Technical Guru
City: Wilmington, NC
Vessel Name: Louisa
Vessel Model: Custom Built 38
Join Date: Jan 2014
Posts: 6,194
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That's a signal generator for a tachometer. If there was a Glendinning sync involve, there would be a tach cable hooked up to where the red cap goes. Zerk fitting is to lube the spinning gears.
Never seen one driven by a sea water pump.
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03-29-2017, 01:22 PM
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#16
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Guru
City: Wilmington, NC
Vessel Name: DreamQuest
Vessel Model: Prairie 36
Join Date: Jan 2016
Posts: 550
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I do have digital tachometers on the flybridge and analog tachs at the lower helm. So the wires could go to the digital tachs. I'll have to see if I can trace the wires up to the FB.
I don't have a synchronizer. Next time I start the engines I'll remove the red cap and see if I can locate something spinning.
Thanks to all for your help.
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03-29-2017, 02:35 PM
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#17
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Guru
City: Sidney BC Canada
Vessel Name: RochePoint
Vessel Model: 1985 Cheer Men PT38 Sedan
Join Date: Apr 2009
Posts: 1,744
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It is a tach generator that is driven off the front of the engine by the gear that drives the injector pump......
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