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Discussion Starter #1
So I did some serious work on this old Ariens ST724 with a 7 hp Tecumseh Snow King.


  • Drained the fuel and cleaned the tank
  • New fuel shut off
  • All new fuel and primer bulb hoses
  • New spark plug
  • New carburetor
  • Changed the oil, twice !
After quite a bit of fiddling with the governor and the main and low speed jets I have it running pretty good. (Boy, is that high speed jet adjustment touchy !)

The only problem it has is that there is an occasional miss (pop) at all speeds. I don't think that it is a lean miss because adding fuel to the main jet does not help. It also smells like it is running rich.


Any tips to get rid of that miss ?
 

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That will likely have to wait until spring. Pull the head and check the valve lash. This engine has had a rough life with very little TLC.
You should be able to check valve clearance without pulling the head off. If it turns out you need to do a valve job, then the head needs to come off. I agree with the idea of waiting till spring. Something about cold weather that makes a skinned knuckle hurt 5 times more than when its warm
 
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