Tecumseh won't shut down

Reply

  #1  
Old 02-08-09, 05:04 PM
Member
Thread Starter
Join Date: Feb 2009
Location: Brooklyn, NY
Posts: 3
Tecumseh won't shut down

I have a Tecumseh HSK845 in a 21" MTD snowthrower. I bought it new about 12 years ago and never did a lick of maintenance on it except to add some sta-bil to the gas. Never had a problem starting it but now I have a problem stopping it. When I turn the key to "off", it just keeps running strong. Last time it ran for about 5 minutes before it started sputtering and finally quit. Prior to shutting, the engine will rev down, like it's going to shut down, but then rev up to normal idle again. It did this about 7 or 8 times before shutting down. Any ideas?

Additionally, not sure this is related, but I also noticed a very slow gas leak recently. Seems to be coming from an area other than the carb, somewhere further south. When I tip it up, the leak goes away. What's my best course before I start disassembling?

Thanks,
Matt.
 
Sponsored Links
  #2  
Old 02-08-09, 05:32 PM
cheese's Avatar
Forum Topic Moderator
Join Date: Jul 2001
Location: USA
Posts: 16,818
Sounds like the kill switch or related wiring is to blame for the stopping problem. The leak will have to be tracked down... does the oil smell like gas?
 
  #3  
Old 02-08-09, 06:04 PM
Member
Join Date: Jul 2006
Location: Central New Hampshire
Posts: 754
These engines usually have 2 shut-offs on them.
1 is the key, which you pull out, not turn. Key is plastic.
The other way to shut them off is to move the throttle lever all the way down. Doing this, contacts a ground that shuts it off.
sounds like you may have a rusty ground switch. Had 2 in my shop earlier this season with that problem.
 
  #4  
Old 02-08-09, 07:30 PM
Member
Thread Starter
Join Date: Feb 2009
Location: Brooklyn, NY
Posts: 3
Cheese,
Yes, it's definitely gas. I was wondering if there's a "typical" spot on these engines that may be the culprit.

Indy,
My key is actually metal. I'm guessing the ground switch is in line with the key switch? Are they one in the same?

Thanks for the quick replies.
 
  #5  
Old 02-09-09, 12:44 AM
cheese's Avatar
Forum Topic Moderator
Join Date: Jul 2001
Location: USA
Posts: 16,818
Does the engine oil smell like gas? (pull the dipstick and smell it)
 
  #6  
Old 02-09-09, 06:27 AM
Member
Thread Starter
Join Date: Feb 2009
Location: Brooklyn, NY
Posts: 3
Cheese,
There is no dipstick or engine oil (that I know of). I add 50:1 to the gas... It's a 4.5hp engine.
 
  #7  
Old 02-09-09, 09:13 PM
cheese's Avatar
Forum Topic Moderator
Join Date: Jul 2001
Location: USA
Posts: 16,818
Oh...2-stroke. I don't know anything about snowblower engines, which is why I rarely try to answer questions about them. I got brave this time, and see what happens? lol!

I'll leave it to the guys who know....
 
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