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86 150 stalls at slow idle - Max WOT 1500 RPM

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  • 86 150 stalls at slow idle - Max WOT 1500 RPM

    After being under way for 30 minutes or so, my 86 150 ETLJ dropped to 1500 RPM, had no guts. Stalls when idling down to shift. Difficult to restart.

    On the way home, I topped off with fresh fuel and added the appropriate amount of stabilizer. The next day I emptied a full container of Sea Foam through the carbs while hooked to hose and "muffs". Seemed to be slight improvement in idle.

    Next time back in the water, no improvement. Difficult to idle down and shift in to gear without stalling. Once underway, no guts and 1500 max RPM. Fast idle to 2200 RPM, engine fluctuates then drops back to 1500. Will not hold fast idle.

    Should mention that after each time out I top off with fresh fuel and the appropriate amount of stabilizer so as to never have souor fuel.

    After researching posts on similar issues, I am afraid I am looking at a carb rebuild, bu before I do thought I should invite input from others regarding what other options I might check out before I commit to rebuilding the carbs. All input welcome.

  • #2
    Always start with compression testing and then spark testing all cylinders.
    Then timing of spark. If all is good then go on to the fuel side

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    • #3
      Thanks for the input on the right sequence. Now at least I know where to start.

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