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Outboard dies off-idle

Marine Fuel Systems

Section - Help! I have a 1997 force 75 outboard. Have replaced fuel lines, primer bulb, rebuilt ...
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  1. #1
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    Member Since : May 2015
    Home Port : Tennessee
    Sport Craft fisherman 160
    Posts : 3

    Default Outboard dies off-idle

    Help! I have a 1997 force 75 outboard. Have replaced fuel lines, primer bulb, rebuilt fuel pump. Motor starts and runs at idle, but stalls just off-idle. Will idle about 45 seconds, then dies. Boat has inboard fuel tank. I am seeing air increasing in the clear fuel lines as it runs. Fuel pump has fresh rebuild. When pumped in by the primer bulb, no air visible in the lines.

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  2. #2
    Roger's Avatar
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    Member Since : May 2011
    Home Port : Maple Ridge, BC, Canada
    Boat's Name : Sweet "P" II
    1979 Tollycraft 30 Sedan
    Posts : 772


    If you are getting air in the fuel line (shouldn't be) perhaps you have fitting that is sucking air.

  3. #3
    Cap'n Ray's Avatar
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    Member Since : Sep 2011
    Home Port : SW Florida
    Boat's Name : Bali Hai
    1988 Carver 3207
    Posts : 1,845


    Check the pickup tube in the tank, line from the pickup to the primer bulb, primer bulb itself and the connector on the tank- any of them could be letting the pump draw air instead of fuel. Also make sure the pickup screen isn't clogged- that'll cause it to draw air too but usually collapses the primer bulb too.

  4. #4
    TimG's Avatar
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    Member Since : Dec 2009
    Home Port : Olive Branch, MS
    Boat's Name : "WooHoo"
    1986 Cruisers Elegante 297
    Posts : 3,039


    on that outboard are the clear lines Before or After the fuel pump?
    ~ on the hook ~

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