New Server!
Antique Engines and Old Iron
[Home] - [HELP] - [Forums] - [Articles] - [Photo Gallery] - [Groups] - [Chat] - [Classified Ads] - [Subscribe] - [Links] - [Books] - [Sponsors] - [Tools]

Go Back   SmokStak > SmokStak® Antique Engine Community > Small Air Cooled Gasoline Engines
Forgot Password? Join Us!

Notices

Small Air Cooled Gasoline Engines Briggs & Stratton, Clinton, Lauson, Maytag, Nelson, Wisconsin and other small air cooled engines.

Small Air Cooled Gasoline Engines

Johnson Utilimotor


I need to get educated on the Johnson Utilimotor Model U. Are they a hit&miss engine? What is the...

this thread has 9 replies and has been viewed 2416 times

Reply
 
Thread Tools Display Modes
  #1  
Old 10-06-2010, 08:57 PM
Arlie Levy Arlie Levy is offline
Registered-III
 
Join Date: Dec 2004
Location: Janesville WI. USA
Posts: 680
Thanks: 9
Thanked 247 Times in 198 Posts
Default Johnson Utilimotor

I need to get educated on the Johnson Utilimotor Model U. Are they a hit&miss engine? What is the fuel mixture? I am running it on 16-1. It smokes real bad to the point the crud runs out of the exhaust. I tried to lean the fuel needle to the point it kills. It still contiues to smoke real bad. It doesn't hit&miss. It contiues to fire every time. Is possible that it is an ignition problem? Any help will be appreciated. Thank you!! Arlie
Reply With Quote
Sponsored Links
  #2  
Old 10-06-2010, 09:21 PM
bergrider01 bergrider01 is offline
Registered-III
 
Join Date: Dec 2008
Location: Kalamazoo,MI
Posts: 211
Thanks: 152
Thanked 101 Times in 51 Posts
Default Re: Johnson Utilamotor

I use the same mixture as the maytag engine take as far as fuel
the fuel adjustment screw is very sensitive just like the upright maytag engines
The engine should hit more often than a 92 maytag but not every time I will try to post a video of mine running I know that mine is correct
You can check the governor and make sure it is moving freely through the inspection cover maybe also your spring is to tight
they do have a different sound than the maytag motors good to hear that you have a running engine
Reply With Quote
  #3  
Old 10-06-2010, 10:06 PM
kelby kelby is offline
Registered-II
 
Join Date: Dec 2005
Location: Hilliard, Ohio, USA
Posts: 66
Thanks: 0
Thanked 17 Times in 13 Posts
Default Re: Johnson Utilamotor

Arlie, In addition to the governor ring spring being too strong, you may also have the governor nut too tight. It should be loose enough to let the governor ring move away from the points tripper with pressure from you finger. I have attached a pic of the WICO mag version so you can see the governor ring with its weight( in the pic the weight is towards the bottom) the govenor nut is directly across from the left coil and the points tripper is at the top of the ring. The governor rings pivots on the screw that the nut is on. Sorry for the explanation if you know this all already. Your engine should run very smooth using the 16 to 1 mixture. Does you carb have the choke lever that can be moved when the engine"warms up". If it is running rich, the choke needs to be open. www.bser.com has a manual for this engine. Send him an email and let him know what mag you have so he can send the correct manual. Let us know what you find as the problem. Kelby
Attached Thumbnails
Engien Pics 025.jpg  
Reply With Quote
The Following User Says Thank You to kelby:
  #4  
Old 10-07-2010, 06:11 PM
Arlie Levy Arlie Levy is offline
Registered-III
 
Join Date: Dec 2004
Location: Janesville WI. USA
Posts: 680
Thanks: 9
Thanked 247 Times in 198 Posts
Default Re: Johnson Utilamotor

Well I really did not find any problems. I checked the gas tank for excessive oil. I did not find any problem there. I drained all the gas and poured in some 50-1 mix from my stehl leaf blower. It runs much better and still smokes a little. I plan to run it for a longer time and see what happens. I will keep you posted. Thankyou for the Ideas. Arlie
Reply With Quote
  #5  
Old 10-07-2010, 10:14 PM
Martin Pope Martin Pope is offline
Registered-I
 
Join Date: Nov 2004
Location: Toronto Ontario
Posts: 14
Thanks: 0
Thanked 13 Times in 10 Posts
Default Re: Johnson Utilimotor

I think that 50 to 1 is to lean and would not run leaner than 20 to 1. These engines run like a Maytag twin about 1500 rpm. What kind of flywheel do you have? Cast iron or aluminum, there are two types of ingition systems. If your serial number is below 9000 it will have aluminum and above 9000 it will be cast iron.
Reply With Quote
  #6  
Old 10-08-2010, 05:28 PM
Ed Radtke Ed Radtke is offline
Registered-III
 
Join Date: Nov 2004
Location: Martinsville In.
Posts: 968
Thanks: 2
Thanked 245 Times in 222 Posts
Default Re: Johnson Utilimotor

Check the rings for wear and free movement.They could also be weak.Exhaust port clear?
Reply With Quote
  #7  
Old 10-10-2010, 09:09 PM
Aevry Aevry is offline
Registered-II
 
Join Date: Oct 2010
Location: Lower Wedgeport Nova Scotia Canada
Posts: 183
Thanks: 35
Thanked 69 Times in 31 Posts
Default Re: Johnson Utilimotor

no its not an ignition problem it is either a 2 stroke or 4 stroke and if it smokes real bad then you might need to replace your rings because it is burning oil along with the fuel.
Reply With Quote
  #8  
Old 10-14-2010, 07:03 AM
worth99 worth99 is offline
Registered-I
 
Join Date: Sep 2009
Location: grand Island,Ne.68801
Posts: 15
Thanks: 6
Thanked 0 Times in 0 Posts
Default Re: Johnson Utilimotor

Any ideas where a guy could find a service manual for a Johnson Utilimotor? I havn't done anything with the motor and would like a manual.
Worth99
Reply With Quote
  #9  
Old 10-31-2011, 08:51 AM
elhoppo elhoppo is offline
Registered-I
 
Join Date: Sep 2011
Location: Merkel, Texas
Posts: 28
Thanks: 8
Thanked 5 Times in 3 Posts
Default Re: Johnson Utilimotor U 14

I am looking for parts for a u 14.The whole flywheel assembly.All I have is the engine.Need somthing to put on shaft to make it run.Thanks
Reply With Quote
  #10  
Old 11-01-2011, 09:37 AM
Andrew Mackey Andrew Mackey is offline
Sponsor
 
Join Date: Nov 2004
Location: Rockaway, New Jersey USA
Posts: 9,202
Thanks: 1,148
Thanked 3,788 Times in 2,435 Posts
Exclamation Re: Johnson Utilimotor

The 2 stroke engine uses 16:1 ratio. Do not cut the ratio as the bronze bearings (manis and rod) will starve for lubrication if you cut it. 50:1 is way too lean! These engines smoke as part of their nature, you can not stop it. Just stay down wind!
Andrew
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
Johnson utilimotor! Danny J Antique Gas Engine Discussion 5 11-10-2009 08:39 PM
Johnson Utilimotor Dave H Antique Engine Archives 0 05-03-2002 10:58 PM
Johnson Utilimotor Harry Antique Engine Archives 0 05-04-2001 06:07 PM
johnson utilimotor david greenwalt Antique Engine Archives 1 01-22-2001 09:49 AM
Johnson Utilimotor Harry Antique Engine Archives 2 07-09-2000 08:58 AM


All times are GMT -4. The time now is 03:59 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 - 2014 by Harry Matthews
P.O. Box 5612 - Sarasota, FL 34277