92 merc 25 issue possibly other than carb

Discussion in 'Outboard Maintenance' started by bartbarry, May 2, 2012.

  1. bartbarry

    bartbarry I Love microskiff.com!

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    I have a 92 mercury 25. The problem is starting and running at low rpm's or at idle. It wont start with just the choke. I have to lift the high idle lever fully to get it to start. Once running it will settle into idle, but when in the water, once I shift into gear, it stalls. Sometimes it will starve out of fuel just idling(carb needs rebuilt I know)...here's another wierd thing it just started doing, It wont start at all unless it's hooked up to the hose with water pushing into it, I cant get it to start at the ramp or in a tank(trash can).

    I'm going to get the carb rebuild kit because I have gas leaking from the gaskets here and there, but is there anything else I should look for that could cause the motor to not want to start unless hooked up to pumping water...it pees strong when running btw.
     
  2. Brett

    Brett > PRO STAFF <

    The problem is starting and running at low rpm's or at idle.
    but when in the water, once I shift into gear, it stalls
    It wont start at all unless it's hooked up to the hose with water


    Backpressure is preventing the engine from running.

    All indicate a carb out of adjustment.
    A 1992 that needs a rebuild and thorough cleaning.
    Then set back to factory specs for idle and full throttle.
     

  3. Frank_Sebastian

    Frank_Sebastian Well-Known Member

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    Do you feel compression from both cylinder when you pull the starter through?

    Frank_S
     
  4. bartbarry

    bartbarry I Love microskiff.com!

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    Yes...when I pull the cord...but it is an elec start so I use that most of the time.

    Going to rebuild the carb and reset everything to factory first.