Tecumseh OVRM120 Lean Surge

Reply

  #1  
Old 06-15-09, 09:02 AM
Member
Thread Starter
Join Date: Mar 2008
Location: US
Posts: 184
Tecumseh OVRM120 Lean Surge

I have an Tec OVRM120 with a lean surge which I have traced down to a worn throttle shaft. There is play in the shaft. When I spray the shaft with carb cleaner the surge is gone and the engine smooths out. I see a replacement throttle shaft and carb kit are available. Does the body typically wear or does the shaft wear on these carbs? Do these carbs rebuild well? Thx.
 
Sponsored Links
  #2  
Old 06-15-09, 12:21 PM
indypower1's Avatar
Member
Join Date: May 2009
Location: Lake Winnipesaukee, New Hampshire
Posts: 634
Both the shaft & carb body can wear and both could be worn on yours. And yes, the carbs usually do rebuild very well.
 
  #3  
Old 06-15-09, 09:46 PM
cheese's Avatar
Forum Topic Moderator
Join Date: Jul 2001
Location: USA
Posts: 16,814
Usually a new shaft takes up the slack sufficiently. Check the shaft bore in the carb and see if it is oversized.
 
  #4  
Old 06-16-09, 07:45 AM
Member
Thread Starter
Join Date: Mar 2008
Location: US
Posts: 184
Originally Posted by cheese View Post
Usually a new shaft takes up the slack sufficiently. Check the shaft bore in the carb and see if it is oversized.
Do you know where I can find the carb bore diameter or shaft dia spec? I have the service manual for the engine and checked the on-line carb rebuild info, but there is no info on the bore dia. The engine code is -22043E and I believe the carb part number is 640274 supersede to 640338.
 
  #5  
Old 06-16-09, 08:04 AM
BFHFixit's Avatar
Banned. Rule And/Or Policy Violation
Join Date: Jun 2007
Location: USA.
Posts: 1,836
I have used felt washers with good results getting some pretty sloppy shafts to seal enough.
Not sure if your carb uses them or if the kit would come with one, if not, most any place that does repair will have some around and likely give you one.
 
  #6  
Old 06-16-09, 10:47 PM
cheese's Avatar
Forum Topic Moderator
Join Date: Jul 2001
Location: USA
Posts: 16,814
No, I don't know the specs. Pull the shaft out and measure the unworn part of it above the carb body for shaft dimensions, then add a few thousandths to it for the bore diameter.
 
Reply

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


Thread Tools
Search this Thread
Display Modes