Bolen qt17 won't fire on left cylinder

[derrickgibbs]

Hi all, I have a bolens with the 17hp kohler kt17. I cannot get the left side to fire. It has great spark, changed the plugs, wires, coil, condenser all twice. It will start and run on one cylinder and I can even blow snow, but left cylinder will not fire at all even with good spark. Remove plug and soaked with fuel. Checked compression 105 left, 107 right. Have recently replaced head and gasket on that side, checked valves and piston and appear to be functioning correctly. This thing is driving me crazy! Thanks for any help.
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[tybilly]

so the left cylinder head is cold after you shut it down?compared to the right side wich is hot?

 

[reynoldston]

so the left cylinder head is cold after you shut it down?compared to the right side wich is hot?

This is a very good suggestion.

 

[exotion]

Does it have dual carbs? Are they both functioning properly

 

[derrickgibbs]

so the left cylinder head is cold after you shut it down?compared to the right side wich is hot?

Yes, cold left side, pulled valves and 1 spring is 3/16" shorter than other? Would that cause my problem

 

[derrickgibbs]

Does it have dual carbs? Are they both functioning properly

One carburetor

 

[EngineMan]

If you have compression within 15% between the two, and you say the plug is wet (fuel and not oil wet) I would still look on the spark side..!

 

[derrickgibbs]

If you have compression within 15% between the two, and you say the plug is wet (fuel and not oil wet) I would still look on the spark side..!

Rechecked compression after running engine and it was 70-85 left and 107 right, of course only running on 1 cylinder

 

[EngineMan]

Its time again to take off the head and check head gasket and valves on that side.