Craftsman model 944.356450 mower engine suring problem


  #1  
Old 06-01-12, 07:09 AM
N
Member
Thread Starter
Join Date: May 2012
Location: Canada
Posts: 10
Received 0 Votes on 0 Posts
Craftsman model 944.356450 mower engine suring problem

My mom has bought a used Craftsman Model 944.356450 self propelled mower with a honda 5.5 hp engine. It starts great but once started, the engine surges and lags repeatedly. Any suggestions as to how I can fix this for her? Here is a link to a video I took of the symptoms. I've replaced the gas, oil and spark plug already.

Craftsman self propelled mower with Honda 5.5 hp engine problem - YouTube
 
  #2  
Old 06-01-12, 09:17 AM
cheese's Avatar
Forum Topic Moderator
Join Date: Jul 2001
Location: USA
Posts: 17,630
Received 55 Votes on 50 Posts
The carburetor needs to be cleaned.
 
  #3  
Old 06-05-12, 06:33 AM
N
Member
Thread Starter
Join Date: May 2012
Location: Canada
Posts: 10
Received 0 Votes on 0 Posts
Thanks for the info cheese, I'll strip it and clean it asap and update on the results.
 
  #4  
Old 06-05-12, 09:11 AM
N
Member
Thread Starter
Join Date: May 2012
Location: Canada
Posts: 10
Received 0 Votes on 0 Posts
Just finished taking the carb apart and giving it a cleaning using carb cleaner and compressed air. It looked really clean to begin with. Reassembled it and its still surging. Repeated the carb cleaning again with the same results. I haven't replaced the gaskets as they looked good. I sprayed carb cleaner around the gaskets with the motor running with no change, suggesting to me the gaskets are not the problem. Plugs have been changed, oil and gas. Any suggestions?
 
  #5  
Old 06-05-12, 09:24 AM
G
Member
Join Date: Jun 2006
Location: United States
Posts: 2,477
Received 11 Votes on 11 Posts
When you had the carb apart did you clean the main jet, if not, it is screwed in the nozzle of the carb, remove the jet clean it and the nozzle with brake parts cleaner, wipe the inside of the nozzle with a Q-tip with cleaner to remove any built up varnish, don't leave any cotton behind. Have a good one. Geo
 
  #6  
Old 06-05-12, 09:25 AM
cheese's Avatar
Forum Topic Moderator
Join Date: Jul 2001
Location: USA
Posts: 17,630
Received 55 Votes on 50 Posts
Did you remove the jets and clean them? Something is still clogged.
 
  #7  
Old 06-09-12, 01:06 PM
N
Member
Thread Starter
Join Date: May 2012
Location: Canada
Posts: 10
Received 0 Votes on 0 Posts
Took the carb apart, cleaned it with break cleaner, letting the parts soak for about an hour before putting it all back together. It runs the same. What is normally included in a carb rebuild kit? Should I bother with that or is there a specific carb part I should focus on, making sure it good. The jets looked good. All ports clear.I'm thinking on throwing the towel in and telling her to bring it in, except now I've spent so much time on this thing, I'd like to see this through.
 
  #8  
Old 06-09-12, 07:38 PM
cheese's Avatar
Forum Topic Moderator
Join Date: Jul 2001
Location: USA
Posts: 17,630
Received 55 Votes on 50 Posts
Brake cleaner doesn't dissolve varnish buildup and gum that clogs a carb. It can help wash off some of it, and blow clear passages that are easy enough to blow through, but it's not made for cleaning carbs... it's made for cleaning brakes. Try using carb cleaner. Advance auto parts sells the brand "next dimension". It works better than most of the others I've tried, but don't let it get in your eyes.
 
 

Thread Tools
Search this Thread
 
Ask a Question
Question Title:
Description: