Thread Tools Search this Thread Display Modes
Old 10-05-2008, 08:09 AM   #1
2 Rivet Member
Currently Looking...
Grain Valley , Missouri
Join Date: Jan 2008
Posts: 69

I have an Onan 4000 in my MH. If I use the Genset for the electrical power, if I don't have the air conditioner on, when I turn on a light, the light blows out. Even with the air off, the lights burn too bright. There isn't a problem on shore power or with battery. Is there a way to turn down the voltage?

QuietWater is offline   Reply With Quote
Old 10-05-2008, 09:59 AM   #2
Rivet Master
87MH's Avatar
1978 31' Sovereign
Texas Airstream Harbor , Zavalla, in the Deep East Texas Piney Woods on Lake Sam Rayburn
Join Date: Jan 2003
Posts: 2,435
Images: 292
Originally Posted by QuietWater View Post
I have an Onan 4000 in my MH.....Is there a way to turn down the voltage?
The voltage is controlled by the governor (speed of the engine - the faster the engine turns, the higher the voltage)....the governor is adjusted via a threaded rod on the top of the genny with a linkage to the carb - make sure all of the springs are in their proper position - there should be at least two springs holding tension on the governor.

The first thing you need to do is get an accurate voltage meter to determine the actual voltage the unit is putting out - if you're planning on doing serious work on the MoHo don't wimp out and buy a cheapie multimeter - get a good one.

If you are not familiar with working on Onans, I would suggest taking the unit to a certified Cummins Onan repair station.

"Suck it up, spend the bucks, do it right the first time."

WBCCI # 1113
AirForums #1737

Trailer '78 31' Sovereign

Living Large at an Airstream Park on the Largest Lake Totally Contained in Texas
Texas Airstream Harbor, Inc.
87MH is offline   Reply With Quote

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

Featured Campgrounds

Reviews provided by


This website is not affiliated with or endorsed by the Airstream, Inc. or any of its affiliates. Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.

Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 12:44 PM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.