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  1. #1
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    Lower unit bolts

    Mercury Mariner V-200 HP .....s/n 0D006834
    Does any one knows the correct size nuts on the lower unit for this motor .
    Or they standard or Metric .....want to order a torque adapter wrench for it to change the water pump .
    Thx

  2. Member
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    #2
    I think they are 5/8" but am not certain. Crow's foot is the thing you are looking for, just be sure you have it at a right angle to the torque wrench so you don't make the wrench longer and make the torque setting inaccurate. Could be a metric size, but if so it would be 16mm, again IIRC. Which usually nobody has since 5/8" is the same size.
    2008 Bass Cat Pantera Classic
    2014 Mercury Pro XS 200

  3. Member
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    #3
    Thx....was going to search the web for a nice used one or new less $$ torque adapter wrench .

  4. Member
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    #4
    The nuts are 7/16ths fine thread stainless lock nuts. It takes a 5/8ths wrench or socket to tighten/remove them.

  5. Mercury 3L/4 Stroke/Verado Moderator EuropeanAM's Avatar
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    #5
    +1


    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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  6. Member
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    #6
    Thx every one for the help . You have to use a open end wrench for the 2 bolt's between the cavitation plate and the rest you can just use a socket and torque wrench .
    The 2.5 is difference than the 3 Liter engines as the 4 studs go thru the gear housing .