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  1. #1
    Ranger Owner
    Join Date
    Dec 2016
    Location
    Sandcut, Indiana
    Posts
    35

    2000 Merc Optimax 225 (Alarm ) Crankcase light is on.

    Noticed it when idling then turned motor off , waited minute or two then started.
    at idle had a (stumple) or clunk sound while engine was idling turn it off ASAP
    First i have no manual or operation guide to work with for a guide.

    Power-head has been rebuild 1 half year ago, and out of warranty.
    I am going to take the cawing off tomorrow and remove the plugs and get a compression tester.
    check the cylinders and hope for the best , I was really hesitant to run the motor and trolled back to the ramp about 2 mile .
    Really wanting to know what this alarm means concerning crankcase logo.
    and could the oil injection system be tied to this ?
    Oil tank was half full.
    Thanks John
    2000 Ranger 520 VX, Merc. Optimax 225.
    Lowrance 2/12 inch Live’s , Minn Kota PC 460 Charger
    Active Target, Hydrowave H2, Lowrance Ghost trolling, Rocks

  2. Member
    Join Date
    Dec 2014
    Location
    Clayton,Delaware
    Posts
    38
    #2
    If you end up needing parts i have a 1999, that I'm about to part out in a few days.

  3. Ranger Owner
    Join Date
    Dec 2016
    Location
    Sandcut, Indiana
    Posts
    35
    #3
    do you have the lower unit ?
    Last edited by Justajig; 12-02-2018 at 08:32 PM.
    2000 Ranger 520 VX, Merc. Optimax 225.
    Lowrance 2/12 inch Live’s , Minn Kota PC 460 Charger
    Active Target, Hydrowave H2, Lowrance Ghost trolling, Rocks

  4. Mercury 3L/4 Stroke/Verado Moderator EuropeanAM's Avatar
    Join Date
    Apr 2008
    Location
    Greenville, SC (US)
    Posts
    95,243
    #4
    Please review the Forum Announcements and provide the Required Info when posting. Thanks!


    Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
    Still consider myself a "Marine Apprentice" after 47 years (learn something new every day).
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