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  1. #1

    Default Won't start-standard for adjusting mixture?

    Hi, we have a 1989 70 hp outboard Merc. Has been running great until the last 2 times out. At low RPMs it bogs down, smokes like hell and won't restart if you turn it off. This last time even over night. It turns over but when and if it catches it dies when put in gear. Running seafoam, plugs were replaced,there is TCW3 in the tank-to be replaced with synthetic when it runs out. No mix in the gas tank needed. Pisses like a 12 year old boy. Is there a standard for mix and idle screws? Do you seat and back off 1 or 2 turns, click your heals and say there's no place like home? Any suggestions? Thank you.

  2. #2
    Join Date
    Aug 2017
    South Africa

    Default Re: Won't start-standard for adjusting mixture?

    Check your fuel pump ... standard carb setting is 1 & 1/2 turns outwards from soft stop and lightly from there. Have a look to see if your carbs are still synced correctly.

  3. #3
    Join Date
    Sep 2010
    Jersey Shore

    Default Re: Won't start-standard for adjusting mixture?

    Before you waste your time doing anything else, Check the compression. 1989...nothing lasts forever.
    Dockside Marine Services
    Jersey Shore.
    Mercruiser/Mercury Certified
    Let the insanity begin.

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