Go Back   iRV2 Forums > MOTORHOME FORUMS > Class C Motorhome Discussions
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
 
Thread Tools Search this Thread Display Modes
 
Old 10-15-2016, 02:04 PM   #1
Junior Member
 
shabti's Avatar
 
Join Date: Sep 2015
Posts: 12
Question Breaking in a New Cummins Onan Generator Engine

My husband and I are complete newbies to RV camping. We just purchased a brand new Class C. I'm reading the manual for the generator and it recommends to "run the generator set at approximately 1/2 rated power for the first 2 hours and then at 3/4 rated power for 2 more hours". For the life of me I cannot find any info about 1/2 and 3/4 rated power and how to do that. Can anyone help me out? Thank you so much!
__________________

__________________
shabti is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 10-15-2016, 02:11 PM   #2
Community Administrator
 
Clifftall's Avatar


 
Fleetwood Owners Club
Ford Super Duty Owner
Join Date: Aug 2009
Posts: 24,832
What model is it , i.e.: 5500 etc?
If it is a 5500 , it will draw about 45 amps at full load. Look at your amp meter ( if you have one ).
15-20 amps would represent 1/2 load and a little more would be 3/4. Usually an AC unit and an electric heater would do the trick.
__________________

__________________


Cliff,Tallulah and Buddy ( 1999-2012 )
Clifftall is offline   Reply With Quote
Old 10-15-2016, 02:15 PM   #3
JFN
Member


 
Join Date: May 2016
Posts: 45
Quote:
Originally Posted by shabti View Post
My husband and I are complete newbies to RV camping. We just purchased a brand new Class C. I'm reading the manual for the generator and it recommends to "run the generator set at approximately 1/2 rated power for the first 2 hours and then at 3/4 rated power for 2 more hours". For the life of me I cannot find any info about 1/2 and 3/4 rated power and how to do that. Can anyone help me out? Thank you so much!
Look at the AC loads for the motorhome, start the generator and turn on some AC powered appliances, the generator is probably a 3K set so it will be hard to load at 1/2 power, maybe do a roast in the microwave, then after 2 hrs turn on the Airconditioner. Me, I would just probably use it and not worry about the break-in.
__________________
2006 28' Durango 5th wheel
2006 Dodge 2500 5.9 Cummins
KK6CWA
JFN is offline   Reply With Quote
Old 10-15-2016, 02:17 PM   #4
Junior Member
 
shabti's Avatar
 
Join Date: Sep 2015
Posts: 12
My Model is RV QG 4000. My coach is 30 amps, so I'm presuming the amps from the generator would be 30. So, based on your reply, I should run my generator with an appliance that would pull about 15 amps for about 2 hours and then when I bump it up to 3/4s I should run appliances that would pull around 22 amps?
__________________
shabti is offline   Reply With Quote
Old 10-15-2016, 02:23 PM   #5
Senior Member


 
Join Date: Aug 2011
Posts: 2,720
Quote:
Originally Posted by shabti View Post
My Model is RV QG 4000. My coach is 30 amps, so I'm presuming the amps from the generator would be 30. So, based on your reply, I should run my generator with an appliance that would pull about 15 amps for about 2 hours and then when I bump it up to 3/4s I should run appliances that would pull around 22 amps?

Yes. One air conditioner should be close to 15 amps.
__________________
pasdad1 is online now   Reply With Quote
Old 10-15-2016, 02:24 PM   #6
Junior Member
 
shabti's Avatar
 
Join Date: Sep 2015
Posts: 12
Quote:
Originally Posted by Clifftall View Post
What model is it , i.e.: 5500 etc?
If it is a 5500 , it will draw about 45 amps at full load. Look at your amp meter ( if you have one ).
15-20 amps would represent 1/2 load and a little more would be 3/4. Usually an AC unit and an electric heater would do the trick.

Thanks!! My spec sheet says it's a 33.3 amps. I'm going to run it now with my Air Conditioner on for two hours and then add another appliance!
__________________
shabti is offline   Reply With Quote
Old 10-15-2016, 03:20 PM   #7
Member
 
Join Date: Sep 2016
Location: Mesa, Arizona
Posts: 58
And don't forget to change the oil, after the break in period. I believe the manual says after the first 20 hours of run time.
__________________

__________________
GoneToTheDog is offline   Reply With Quote
Reply

Tags
cummins, engine, generator, onan


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Breaking in a new MH gasser engine marjoa Class A Motorhome Discussions 12 08-31-2016 01:38 PM
Replacement ONAN/Cummins engine for generator Tincup RV Systems & Appliances 2 03-02-2016 05:15 PM
Cummins Engine Protect light, Cummins ISB 5.9 24V (update) briankstan Cummins Engines 23 05-26-2015 09:34 PM
New Cummins Onan generator wont stay running BlessedGirl Jayco Owner's Forum 14 09-19-2014 08:15 AM
Any Monaco ownwers with Cummins Onan HQD generator turbo24 Monaco Owner's Forum 2 01-11-2008 07:19 PM

» Virginia Campgrounds

Reviews provided by

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 02:21 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.