Generators and Motors
[Home] - [HELP] - [Forums] - [Library] - [Photo Gallery] - [Groups] - [Classified Ads] - [Subscribe] - [Links] - [Books] - [Sponsors] -

Go Back   SmokStak > SmokStak® Vintage Electrical Equipment > Generators & Electric Motors General Discussion > Onan Generators
Forgot Password? Join Us!

Notices

Onan Generators Restoring, operating and maintaining vintage Onan generators.

Onan Generators

Onan 20kW Sets- Which One & Why?


this thread has 33 replies and has been viewed 1027 times

Reply
 
Thread Tools Display Modes
  #11  
Old 09-18-2018, 01:29:33 PM
Leon N. Leon N. is offline
Registered-III
 
Join Date: Oct 2009
Location: N. Chelmsford, MA, USA
Posts: 4,144
Thanks: 725
Thanked 2,439 Times in 1,437 Posts
Default Re: Onan 20kW Sets- Which One & Why?

Yes, yes and yes. I agree sort of. Guess it would be OK as long as the 20 Kw is shut down when the whistle blows at 4:30. The point I found out even with the JB running 24/7 is the average load is very very small. Obviously if you have a critical need for 20 Kw when the power goes out that is a different story. Yes it would be nice if you can amortize the investment over a number of years. If you can guarantee a heavy load I would go for the diesel. In my opinion you will have to give just about an equal amount of attention to the diesel fuel supply as you do the lube oil. Go for it!
Reply With Quote
The Following User Says Thank You to Leon N. For This Post:
Sponsored Links
  #12  
Old 09-18-2018, 05:20:18 PM
Gunny Gunny is offline
Subscriber
 
Join Date: Feb 2005
Location: North Carolina
Posts: 3,737
Thanks: 1,663
Thanked 1,615 Times in 1,027 Posts
Default Re: Onan 20kW Sets- Which One & Why?

That is NOT a 4B Cummins. If it was it would be worth it, that one, not so much so.

I'd go with the 20EK and convert it to dry fuel. Gasoline is not a good fuel for standby gensets. That 2300 cc Ford will run for a very long time with proper maintenance.

BTW that is NOT a 3600 rpm set. Runs at 1800.

Change that timing belt and all hoses every 5 years and it'll be around a very long time.
Reply With Quote
The Following 2 Users Say Thank You to Gunny For This Post:
  #13  
Old 09-18-2018, 08:18:33 PM
len k len k is offline
Registered-III
 
Join Date: Jun 2012
Location: Manchester, New Hampshire
Posts: 16,865
Thanks: 483
Thanked 6,150 Times in 4,474 Posts
Default Re: Onan 20kW Sets- Which One & Why?

I would only consider a 20kw gen if I REALLY DESPERATELY NEEDED for all that power.
Don't want to over sized gen if don't need the power.
No-load fuel consumption ~ doubles as gen kw size doubles.

Over a 1 week run, 24/7, even just no-load consumes some SERIOUS CASH for fuel, and emptys the fuel tank. All gens are thirsty and if lightly loaded make utility bills look ~ FREE when run for a week continuously. Run the numbers.

Ratioing from a 15 JC:
Likely a 20 kw gasoline gen will consume ~ 1.3 GPH @ no-load and ~ 3.2 @ full load
If continuous 24/7 running, even only no-load means ~ 218 gallons/week MINIMUM, (~ $580).
Propane add ~ 20%
Diesel cut by ~50%
.

Last edited by len k; 09-19-2018 at 01:45:46 AM.
Reply With Quote
The Following User Says Thank You to len k For This Post:
  #14  
Old 09-19-2018, 07:00:15 PM
mjd325is mjd325is is online now
Registered
 
Join Date: Nov 2014
Location: Sandown, New Hampshire
Posts: 49
Thanks: 50
Thanked 4 Times in 3 Posts
Default Re: Onan 20kW Sets- Which One & Why?

A diesel set like that with the 4B would be nice. I have a Case backhoe with a Cummins 4B, what a great engine... No idea how it starts in dead cold winter with no glow plugs, but it always does. Great machine.
Reply With Quote
  #15  
Old 09-19-2018, 07:15:01 PM
Wayne 440 Wayne 440 is offline
Registered-III
 
Join Date: Nov 2004
Location: Kentucky
Posts: 6,266
Thanks: 370
Thanked 5,285 Times in 2,550 Posts
Default Re: Onan 20kW Sets- Which One & Why?

Quote:
Originally Posted by len k View Post
I would only consider a 20kw gen if I REALLY DESPERATELY NEEDED for all that power....If continuous 24/7 running, even only no-load means ~ 218 gallons/week MINIMUM, (~ $580).
Propane add ~ 20%
Diesel cut by ~50%
.
All of those figures are less expensive than one "three star" motel/hotel room for a week. And you have all the comforts of home, plus fewer worries about looters/thieves etc. I'll happily run my 15 or 30kW sets for as long as I can get fuel for them, and call it money well spent.
Reply With Quote
The Following 2 Users Say Thank You to Wayne 440 For This Post:
  #16  
Old 09-19-2018, 07:26:44 PM
len k len k is offline
Registered-III
 
Join Date: Jun 2012
Location: Manchester, New Hampshire
Posts: 16,865
Thanks: 483
Thanked 6,150 Times in 4,474 Posts
Default Re: Onan 20kW Sets- Which One & Why?

True, but my point is stay home AND save money, by not grossly oversizing gen beyond your REAL needs.

For most people Load management is easy and well worth the fuel savings of a smaller gen. Convenient as it is to make 120/240 to connect to my house I'm starting to think even my 7NHM is excessive for my core true needs.
Reply With Quote
  #17  
Old 09-19-2018, 07:36:41 PM
Wayne 440 Wayne 440 is offline
Registered-III
 
Join Date: Nov 2004
Location: Kentucky
Posts: 6,266
Thanks: 370
Thanked 5,285 Times in 2,550 Posts
Default Re: Onan 20kW Sets- Which One & Why?

Point taken. For your enlightenment, my list of "REAL needs" is posted below.

Item #1. Whatever it takes to make wife happy

NOTE to the unmarried - "happy" is a euphemism. You are on your own to figure it out.
Reply With Quote
The Following User Says Thank You to Wayne 440 For This Post:
  #18  
Old 09-19-2018, 07:45:41 PM
len k len k is offline
Registered-III
 
Join Date: Jun 2012
Location: Manchester, New Hampshire
Posts: 16,865
Thanks: 483
Thanked 6,150 Times in 4,474 Posts
Default Re: Onan 20kW Sets- Which One & Why?

You do have a point, load management can be inconvenient.

Luckily the wife is not very demanding. Power for oil furnace heat (and hot water it makes), some lights, refrigerator and TV. Have city water. Here outages > 1-2 hours only happen during winter ice storms, and all outages are very rare.

Can shut off furnace and fridge to run one stove top element (~1.5 kw) to cook if too cold for me to cook on propane grill outside. Washing clothes and dishes can wait till power comes back on.
Reply With Quote
  #19  
Old 09-19-2018, 07:48:46 PM
Motorhead's Avatar
Motorhead Motorhead is online now
Subscriber
 
Join Date: May 2007
Location: Central Coast, California
Posts: 4,228
Thanks: 2,071
Thanked 2,980 Times in 1,542 Posts
Default Re: Onan 20kW Sets- Which One & Why?

I'd personally stay away from the Onan L423D. Parts are going to be very hard to find and expensive. They have to have good glow plugs or they won't start because they are an INDIRECT injected diesel with a pre chamber. The Cummins 4B or 4BT is a direct injected engine and just about bullet proof.

One thing that you should consider as a negative is a coolant cooling system. Granted the 15 KW JC is about as big a set as I have seen being air cooled unless you get into a DEUTZ air cooled powered generator. A cooling system that sits and not used every day like a car seems to deteriorate faster and usually the RADIATORS are unit specific and not interchangeable with a MUCH cheaper car radiator. For giggles, look up and price a replacement radiator for each of the units you are looking at.
If you have natural gas or large propane tank then, in my opinion, you have it made. Diesel would be my second choice but diesel sets are more efficient. Gasoline sets are dead last.
__________________
My 1939 WILLYS Pickup.
Bought in 1971
Reply With Quote
The Following User Says Thank You to Motorhead For This Post:
  #20  
Old 09-19-2018, 07:54:22 PM
grif grif is offline
Registered-III
 
Join Date: Oct 2011
Location: Yakima, Washington
Posts: 1,456
Thanks: 560
Thanked 418 Times in 297 Posts
Default Re: Onan 20kW Sets- Which One & Why?

Quote:
Originally Posted by Motorhead View Post
Gasoline sets are dead last.
I agree,,, but then just wait till the power's out, wife's watching two freezers start to warm up,,, no hot water for a shower about then a 30KW running gasoline gets nothing but gold stars regardless of the price of gas ;-)

Never been there,,, but I've got the wife ;-)
Reply With Quote
Reply


Thread Tools
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

F o r u m Jump

Similar Threads Chosen at Random
Thread Thread Starter F o r u m Replies Last Post
Onan 115 kw Set and 40 kw Sets Wolfpack Onan Generators 5 09-17-2018 07:49:01 AM
Onan 20KW will not crank. DN29626 Onan Generators 69 09-09-2017 10:36:00 PM
Onan GDP 20kw NPW Onan Generators 5 01-15-2017 10:27:42 PM
Onan 20KW? rodymartin Onan Generators 10 09-03-2013 04:49:55 PM
Onan 20KW Rob Onan Generators 6 12-01-2005 01:26:20 AM


Use "Ctrl" mouse wheel to change screen size.
All times are GMT -4. The time now is 11:00:42 AM.

Smokstak and Enginads site search!


All use is subject to our TERMS OF SERVICE
SMOKSTAK® is a Registered Trade Mark - A Community of Antique Engine Enthusiasts
Copyright © 2000 - 2016 by Harry Matthews P.O. Box 5612 - Sarasota, FL 34277