1978 larson mercruiser 302 motor

Discussion in 'Gas Engines' started by odieboy16, Oct 8, 2012.

  1. odieboy16
    Joined: Oct 2012
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    odieboy16 Junior Member

    the motor starts and goes down the lake after .25-.50 of a mile the motor just sorta looses power and shuts off but will usually start right up.it runs so smooth its crazy just the thought of it cuuting off in the wrong place or maybe not starting up is scary any ideas
     
    Last edited by a moderator: Oct 13, 2012
  2. thudpucker
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    thudpucker Senior Member

    Fuel starvation. Check the Tank venting. A Mud Daubers job is to fill every hole you carelessly left unfilled.
     
  3. gonzo
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    gonzo Senior Member

    Are you sure it is a 602?
     
  4. odieboy16
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    odieboy16 Junior Member

    no its a 302 ford motor
     
  5. gonzo
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    gonzo Senior Member

    Does it cut off suddenly like if you turn off the key or does it miss and sputter, then die?
     
  6. odieboy16
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    odieboy16 Junior Member

    its like someone reached over and pulled the throttle back
    then cuts off and will start back but sometimes it seems as though the battrry is dead but then it starts up fine
     
  7. gonzo
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    gonzo Senior Member

    If it slows down and dies, it is most probably a fuel problem. It can be a vent, a clog somewhere,and intermittent air leak, a sticky float or needle in the carburetor or a faulty fuel pump.
     
  8. odieboy16
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    odieboy16 Junior Member

    i had the carb rebuilt reolaced the filter in the carb so i guess i will try replacing the fuel pump
     
  9. gonzo
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    gonzo Senior Member

    Replacing parts without troubleshooting is an expensive way to do it. A pressure/vacuum gauge can tell you a lot about the fuel system.
     
  10. odieboy16
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    odieboy16 Junior Member

    you are right and i am going to see a guy on thursday and see what he can tell me exactly what the problem may be, as i dont have money to throw away but i will fix what needs to be fixed.
     
  11. odieboy16
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    odieboy16 Junior Member

    thanks gonzo for your help I will let you know what I find
     

  12. gonzo
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    gonzo Senior Member

    Keep us posted, and good luck.
     
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