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    mikeshbike's Avatar
    mikeshbike Posts: 1, Reputation: 1
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    #1

    Apr 18, 2009, 03:12 PM
    Briggs and Stratton 14.5 HP mower engine poor performance
    I am just getting my rider mower running after two years sitting. I put in new gas, flush gas line, new gas filter, new plug, new oil, new oil filter. Would only start with starter fluid. I cleaned out carburator, drained gas, spray with carb cleaner, re-assembled. It starts now but only runs medium throttle and full choke. More throttle or less choke stops the engine. What is the problem? Is it carb? Will running a while with cleaner perhaps fix problem? New carb needed? This is a Briggs and Stratton 14.5 OHC Quiet Series engine. Vertical shaft. Purchased in 2000.
    21boat's Avatar
    21boat Posts: 2,441, Reputation: 212
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    #2

    Apr 18, 2009, 04:44 PM
    Quote Originally Posted by ;
    Is it carb? I cleaned out carburetor
    Is there needle valves on the crab and one for fuel and one for air? They could be bad themselves in the carb.

    It may just need a carb rebuild kit since its been sitting and or dirt In the carb ports.

    Fuel pump here could be weak and is not out of the question.

    I wouldn't get a new carb just rebuild what you have if you can't adjust the carb properly
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