Small Engines (Lawn Mowers, etc.): small engine only firing on one side, question pool, air mixture

Question
I have a bomadier sled with a 2 cylander engine.  There is about 125 lbs pressure on each side and there is spark at each plug as well as fuel, but it will only run on the one side.  When I remove the left plug it will start and run but when I remove the right plug, it kind of trys to start but won't and of course won't run.

Do you have any suggestions as to what I could try?

Thanks,  Wayne

Answer
Hello Wayne:

>>Sorry for the Delay. This Question was Located in the Question Pool and I can Only Answer Questions from the Question Pool when I am Not Answering Questions here or at the Other Site I Answer Questions at.
>>From your Description it Sounds like a Valve Problem or if this Engine has the 2 BBL Carburetor, then the Carburetor Port for that Cylinder May be Restricted and the Cylinder is Not Getting the Proper Gas/Air Mixture to Run.
>>Send me the Model and Type or Spec Numbers Off the Engine, Please. With these I can Locate the Proper Manual and Better Assist you.
>>Please, Do Not Hesitate, If you Hit a Snag, if I Missed Something or this Does Not Correct the Problem, I am Here if You Require More Assistance. Hope this Helps. Let me Know What Happens, Please. May the All Mighty Bless You and Yours. Thanks.

Good Luck

Respectfully

John

>>PS: I am Allowed to Answer 10 Questions a Day. If you See I am Maxxed Out, then Try Submitting your Question at or Just After 8pm EST (US). My New Day Starts then. Comments and Ratings are Greatly Appreciated. Thanks.

Respectfully

John