Reply
 
Thread Tools Search this Thread Display Modes
 
Old 12-10-2016, 11:44 AM   #1
Senior Member
 
Dune's Avatar
 
City: Coastal SC
Country: USA
Vessel Model: Viking 65 CP MY (run at trawler speeds !)
Join Date: Jul 2015
Posts: 388
Possible to run Onan 20kW generator out of water ?

My boat is on the hard for some weeks for minor hurricane related repairs. Found a leak in the rectangular fuel filter at the seal right before we left for the yard and would really like to fix that before the boat is back in the water.

I could of course easily replace the filter on the hard but sure would be nice to run the generator a little to make sure it is not leaking after the filter replacement....would only take 30 seconds of running to know.

I suspect I am about to hear the problem would not be overheating in 30 seconds but damage to the water pump impeller. If so, maybe I could remove it first....where is it on a 1993 Onan 20kW marine generator ?

Alternatively I suppose a garden hose might be jammed in the intake somehow and water run that way but of all those intakes might be hard to find the right one...follow the strainer inside the bllge I guess....do they make garden hose attachments to jam in a thru hull from the outside ?
__________________
Advertisement

Dune is offline   Reply With Quote
Old 12-10-2016, 11:56 AM   #2
Enigma
 
RT Firefly's Avatar
 
City: Slicker?
Country: Bumpkin?
Join Date: Oct 2007
Posts: 12,761
Greetings,
Mr. D. I've seen a rubber suction cup type device with an integral wire hook that clamps/hooks onto the through hull intake, so I know they are made, but haven't a clue what they're called.
To find the right through hull, take the top off the sea strainer and run a hose. See where the water is exiting on the hull...
__________________

__________________
RTF
RT Firefly is offline   Reply With Quote
Old 12-10-2016, 12:04 PM   #3
Guru
 
City: Carefree, Arizona
Country: usa
Vessel Name: sunchaser V
Vessel Model: DeFever 48
Join Date: Apr 2008
Posts: 8,083
Quote:
Originally Posted by Dune View Post

I suspect I am about to hear the problem would not be overheating in 30 seconds but damage to the water pump impeller. If so, maybe I could remove it first....where is it on a 1993 Onan 20kW marine generator ?

?
Lots of ways to get water to the genset. First things first though - FIND and KNOW HOW to change out that pesky impeller.
sunchaser is offline   Reply With Quote
Old 12-10-2016, 12:08 PM   #4
Senior Member
 
Dune's Avatar
 
City: Coastal SC
Country: USA
Vessel Model: Viking 65 CP MY (run at trawler speeds !)
Join Date: Jul 2015
Posts: 388
Quote:
Originally Posted by sunchaser View Post
Lots of ways to get water to the genset. First things first though - FIND and KNOW HOW to change out that pesky impeller.
Yeah well, I knew at one time...but now forget....in the manual of course, but the manual is 60 miles away right now.
Dune is offline   Reply With Quote
Old 12-10-2016, 01:02 PM   #5
Senior Member
 
Gabe n Em's Avatar
 
City: Point Judith, RI
Country: USA
Vessel Name: In Sanity
Vessel Model: 1981 Mainship 40'
Join Date: Jan 2015
Posts: 408
Close through hull, open strainer cap, insert running hose. Don't Rev it.

No warranties express or implied
Gabe n Em is offline   Reply With Quote
Old 12-10-2016, 02:21 PM   #6
Senior Member
 
City: Wherever the boat is
Country: United States
Vessel Name: Silver Quarter
Vessel Model: Bayliner 3870
Join Date: Sep 2016
Posts: 456
Quote:
Originally Posted by Gabe n Em View Post
Close through hull, open strainer cap, insert running hose. Don't Rev it.

No warranties express or implied
Brilliant
kev_rm is offline   Reply With Quote
Old 12-10-2016, 03:14 PM   #7
Guru
 
Capt.Bill11's Avatar
 
City: Sarasota/Ft. Lauderdale
Country: USA
Join Date: Apr 2014
Posts: 5,436
Quote:
Originally Posted by kev_rm View Post
Brilliant
And over reving will not be an issue with a genset.
Capt.Bill11 is offline   Reply With Quote
Old 12-10-2016, 04:05 PM   #8
Guru
 
High Wire's Avatar
 
City: Cape May, NJ and Englewood, FL
Country: USA
Vessel Name: Irish Lady
Join Date: Dec 2007
Posts: 2,813
Quote:
Originally Posted by Gabe n Em View Post
Close through hull, open strainer cap, insert running hose. Don't Rev it.

No warranties express or implied
Yep. Add a simple 90 degree garden hose shutoff valve on the boat end and make sure you have a way to pump out the bilge or drain it. Make sure the end of the hose doesn't blow out of the strainer.
__________________
Archie
1984 Monk 36 Hull #46
Currently southbound in Georgia.
High Wire is offline   Reply With Quote
Old 12-10-2016, 04:55 PM   #9
TF Site Team
 
Bay Pelican's Avatar
 
City: Chicago, IL
Country: USA
Vessel Name: Bay Pelican
Vessel Model: Krogen 42
Join Date: Oct 2007
Posts: 2,994
This is one of the ways to flush the genset at the end of the season with fresh water.
Some of us have installed the Groco valves so that we can attach the garden hose directly to the strainer for both flushing and to use as an emergency pump.
__________________
Marty
Bay Pelican is offline   Reply With Quote
Old 12-10-2016, 05:15 PM   #10
TF Site Team
 
Bacchus's Avatar
 
City: Seneca Lake NY
Country: US
Vessel Name: Bacchus
Vessel Model: MS 34 HT Trawler
Join Date: Nov 2014
Posts: 2,930
My yard uses a simple household iten for winterizing...take a common rubber plunger...remove the handle and cut/ drill the hole through then insert a piece of half inch pipe w a valve and hose ftg adaptor...connect the hose and you are ready...will need a helper to hold it onto the thru hull for the gen.
The same rig works for winterizing if you hook up to antifreeze...they mount a drum on the travel lift so it is gravity flow to the thru hull.
Pretty simple & inexpensive!!!
__________________
Don
2008 MS 34 HT Trawler
"Bacchus"
Bacchus is offline   Reply With Quote
Old 12-10-2016, 06:11 PM   #11
Guru
 
psneeld's Avatar
 
City: AICW
Country: USA
Vessel Name: Freedom
Vessel Model: Albin 40
Join Date: Oct 2011
Posts: 20,024
Take the impeller out and run it for 30 seconds.

More than that and I would developed plan B.
psneeld is offline   Reply With Quote
Old 12-10-2016, 09:16 PM   #12
Guru
 
Ski in NC's Avatar
 
City: Wilmington, NC
Country: USA
Vessel Name: Louisa
Vessel Model: Custom Built 38
Join Date: Jan 2014
Posts: 5,359
Most gennies, a garden hose in the strainer does the job. Put hose in, close sea cock, turn on water, start machine, and if it starts drawing water you are good to go.
Ski in NC is offline   Reply With Quote
Old 12-10-2016, 09:17 PM   #13
Guru
 
Mule's Avatar
 
City: Fort Pierce
Country: USA
Vessel Name: Florita Ann
Vessel Model: 1982 Present
Join Date: May 2014
Posts: 1,935
Quote:
Originally Posted by Bacchus View Post
My yard uses a simple household iten for winterizing...take a common rubber plunger...remove the handle and cut/ drill the hole through then insert a piece of half inch pipe w a valve and hose ftg adaptor...connect the hose and you are ready...will need a helper to hold it onto the thru hull for the gen.
The same rig works for winterizing if you hook up to antifreeze...they mount a drum on the travel lift so it is gravity flow to the thru hull.
Pretty simple & inexpensive!!!
Ya beat me...simple plumber helper.
Mule is offline   Reply With Quote
Old 12-11-2016, 12:19 AM   #14
Guru
 
kapnd's Avatar
 
City: hawaii
Country: usa
Vessel Name: #31
Vessel Model: ex-Navy MUB 50 fish/cruise
Join Date: Aug 2013
Posts: 545
Shame on your boats builder for not installing a fresh water flush point from the getgo. Regular flushing with fresh after use will vastly extend the life of your cooling systems. Mains, genset, and AC all will live much longer without being pickled in salt. It doesn't take a great deal of water to do so, and even a partial flush will dilute to a much more tolerable level.
__________________
You can lead a horse to water,
But you can't make him ski...
kapnd is offline   Reply With Quote
Old 12-11-2016, 08:02 PM   #15
Senior Member
 
Dune's Avatar
 
City: Coastal SC
Country: USA
Vessel Model: Viking 65 CP MY (run at trawler speeds !)
Join Date: Jul 2015
Posts: 388
Quote:
Originally Posted by High Wire View Post
Yep. Add a simple 90 degree garden hose shutoff valve on the boat end and make sure you have a way to pump out the bilge or drain it. Make sure the end of the hose doesn't blow out of the strainer.
Getting a yard water supplied garden house in a boat of this size to the engine room, would be quite a PITA but as it turns out there is a hose with nozzle already in the engine room that supplies water from the fresh water tank. Not sure if it will keep up with the required water supply of the generator but hopefully enough for 30 seconds anyway.
Dune is offline   Reply With Quote
Old 12-11-2016, 08:05 PM   #16
Senior Member
 
Dune's Avatar
 
City: Coastal SC
Country: USA
Vessel Model: Viking 65 CP MY (run at trawler speeds !)
Join Date: Jul 2015
Posts: 388
Quote:
Originally Posted by kapnd View Post
Shame on your boats builder for not installing a fresh water flush point from the getgo. Regular flushing with fresh after use will vastly extend the life of your cooling systems. Mains, genset, and AC all will live much longer without being pickled in salt. It doesn't take a great deal of water to do so, and even a partial flush will dilute to a much more tolerable level.
There may be one that I just don't know is there.
Dune is offline   Reply With Quote
Old 12-11-2016, 08:29 PM   #17
Guru
 
City: North Charleston, SC
Country: USA
Join Date: Sep 2010
Posts: 4,385
Quote:
Originally Posted by RT Firefly View Post
Greetings,
Mr. D. I've seen a rubber suction cup type device with an integral wire hook that clamps/hooks onto the through hull intake, so I know they are made, but haven't a clue what they're called.l...
It's called a "Fake-A-Lake.



That's probably a brand name. The pole extends so you can wedge it between the ground or pavement and the hull.
rwidman is offline   Reply With Quote
Old 12-12-2016, 06:55 AM   #18
Guru
 
Shoalwaters's Avatar
 
City: Rodney Bay Lagoon
Country: St. Lucia, West Indies
Vessel Name: "Dragon Lady"
Vessel Model: DeFever 41
Join Date: Feb 2008
Posts: 681
Quote:
Originally Posted by Ski in NC View Post
Most gennies, a garden hose in the strainer does the job. Put hose in, close sea cock, turn on water, start machine, and if it starts drawing water you are good to go.
Yup, this route or making it suck from a bucket or dedicated tank are the safest ways to go. The thought of connecting a pressurised hose to the system always makes me uneasy. There is a risk, however slight, of filling the exhaust and engine with water. Murphy knew what he was talking about!
__________________
Mike
If all else fails, read the instructions
If it ain't broke, don't fix it
Shoalwaters is offline   Reply With Quote
Old 12-12-2016, 09:46 AM   #19
Senior Member
 
City: Wherever the boat is
Country: United States
Vessel Name: Silver Quarter
Vessel Model: Bayliner 3870
Join Date: Sep 2016
Posts: 456
Quote:
Originally Posted by Bay Pelican View Post
This is one of the ways to flush the genset at the end of the season with fresh water.
Some of us have installed the Groco valves so that we can attach the garden hose directly to the strainer for both flushing and to use as an emergency pump.


I want to install this on my boat -

Just curious what do you use to "T" to the garden hose input? Just a brass (edit: bronze) T then a valve? (nipple, threaded, whatever)
kev_rm is offline   Reply With Quote
Old 12-12-2016, 10:39 AM   #20
Enigma
 
RT Firefly's Avatar
 
City: Slicker?
Country: Bumpkin?
Join Date: Oct 2007
Posts: 12,761
Greetings,
Mr. k. "Just a brass T then a valve?" Configuration aside you'd be best to use bronze fittings NOT brass.
__________________

__________________
RTF
RT Firefly is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off





All times are GMT -5. The time now is 05:05 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012
×