Tecumseh hssk50 - stalls with choke off, rebuilding carb did not help.

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  #1  
Old 01-26-11, 05:15 PM
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Tecumseh hssk50 - stalls with choke off, rebuilding carb did not help.

I have a Yardman snowblower ran good for past 5 years till now.
it starts but have to play with choke to keep it running, when warm it runs with choke on one click (too rich), if I turn choke off it stalls (too lean) I can keep it running if i tap primer button catching it before stall.

Carb looks pretty clean, but following things I tried and still did not help.
1. clean with carb cleaner
2. soak in berryman chem-dip for 15mins.
3. wire through high speed jet (hole near end of thread)
4. carb rebuild kit installed by shop
5. drained and put fresh fuel in, flows freely
6. replace float

what else should I do? I'm out of things to try.
engine: hssk50-67404T
Carb: TEC-640084B
this is a fixed jet carb, there are no adjustments on it.
 
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  #2  
Old 01-26-11, 07:04 PM
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When you say
3. wire through high speed jet (hole near end of thread)

is it the one at the top or bottom, if it is not the one at the top, it is almost invisible, I use the wire from a twist tie to clean it.
Check the Pic below for reference only as there are several styles. Have a good one. Geo
 
  #3  
Old 01-26-11, 07:18 PM
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Top one, the smaller hole.
also forgot later was replaced anyways when I got the rebuild kit.
 
  #4  
Old 01-27-11, 08:37 AM
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If no carb adjustments, and you have to choke it to run, I'd say you've a gasket issue between carb and engine leaking air.
 
  #5  
Old 01-27-11, 04:22 PM
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You still have a dirty carb. Most likely varnish in the internal circuts. The only way I have found to get to those is by soaking in a carb cleaning solution. Spray carb cleaner is only good for dirt & grease on the outside of the carb and maybe some "loose: stuff on the inside. It will not do anything about varnish build up.
Try some Seafoam first.
 
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