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  1. #1
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    Occasional sneeze on start up

    99 Merc 2.5, about 5 hours on fresh rebuild. Using WH-22 carbs. This only happens after I warm it up and run down the lake to fish, shut it off and fish a while(hour or two) then fire up to move locations. Only happens once then starts right up and runs perfect, does not happen every time.

    Slimm
    Hire the handicapped, we're fun to watch

  2. #2
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    mine used to sneeze at start up below 75 so i turn fuel screw out another 1/4 turn on cooler days on whm carbs the fuel screw is + or - 4 jet sizes according to chart

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  4. #3
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    Check your idle timing and bump it up until it smooth out at idle then back off the idle screw till its at the correct idle RPM in Gear.
    Bud Conner "Heathen" "Defending Our Constitution"

    FOR ALL ENGINE APPLICATIONS
    DRY Film Lubricant for Piston Skirts & Cranks + Thermal Barrier Ceramic Coatings for Piston Tops, Combustion Chambers, Valves etc !!



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