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!


Onan Generators Restoring, operating and maintaining vintage Onan generators.

Onan Generators

Onan CCK round head vs UN opinion please

this thread has 2 replies and has been viewed 321 times

Thread Tools Display Modes
Old 03-18-2017, 11:16:29 AM
Dan H Dan H is offline
Join Date: Nov 2005
Location: Waterloo, Ontario, Canada
Posts: 23
Thanks: 15
Thanked 43 Times in 14 Posts
Default Onan CCK round head vs UN opinion please

On the horns of a dilemma. Contrary to popular belief, one can have to many gen sets. 30 years ago with a young family in the country and older relatives, we had a urgent need for hydro. Than came grandchildren and hydro outages of a week. Always had at least 3 CCks, 2 round heads and 1 UN. Now with 4 round heads and 4 UNs (and 1 JB 5k round head and 1 AJ) I wish to downsize. I need to concentrate on 1 design only. Both styles have very obvious good and bad points that I am aware of. Everyone has a opinion, be it right or wrong. I am hoping with this post I can gain some more insight into the 2 designs for reliability and abuse. What started this line of thinking was the post earlier this week on the history of Onan where they mentioned a better gen set for RVs that would start AC better. Thinking about it the UN always started my old 220 compressor a lot nicer. Thanks in advance for your insights, Dan
Reply With Quote
Sponsored Links
Old 03-18-2017, 11:50:32 AM
Motorhead's Avatar
Motorhead Motorhead is online now
Join Date: May 2007
Location: Central Coast, California
Posts: 3,815
Thanks: 1,802
Thanked 2,635 Times in 1,367 Posts
Default Re: cck round head vs UN opinion please

The UN seems to turn the engine over better than the round head for starting.
Obviously, the square UN head is newer so parts availability should be better and that design was used in several models. I wouldn't have any issues if they were mine to take the best and quietest engines be they newer or older and pair them up with the best of your generator heads. In other words, take the best of your components and match them up together.
The Control panel
and gauges of my
Reply With Quote
The Following 2 Users Say Thank You to Motorhead For This Post:
Old 03-18-2017, 01:14:13 PM
Kevin K Kevin K is offline
Join Date: Jan 2005
Location: upstate New York USA
Posts: 3,822
Thanks: 3,500
Thanked 3,942 Times in 2,098 Posts
Default Re: cck round head vs UN opinion please

I would say go with the UN generators. The starting current is less, the weight is less, and they are easier to get parts for. For example, the brush holders on the round head generators are getting hard to find, and pricey when you can find them.

I have two round head CCK's and one square head CCK. Any CCK's I purchase in the future will be 5CCK's with a UN generator and reconnectable to 120/240 or 120 only.
Reply With Quote
The Following 3 Users Say Thank You to Kevin K For This Post:

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 4.0CCK round style generator head turtmaster Onan Generators 36 03-17-2017 03:54:58 PM
Onan 4.0cck-1r/111p round head question on bolt type location turtmaster Onan Generators 8 08-21-2016 06:14:05 AM
5.0 CCK... Round head or Square head? Which is better? Motorhead Onan Generators 5 12-04-2013 08:14:51 PM
Onan 2.5 LK opinion bobbyz72 Onan Generators 6 09-06-2010 04:02:22 AM
Rope Start Round Head FH Briggs Junkologist Small Air Cooled Gasoline Engines 4 07-26-2009 07:02:17 PM

Use "Ctrl" mouse wheel to change screen size.
All times are GMT -4. The time now is 02:52:30 PM.

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