Quick Question on lower unit changing oil.

  • Charles
    Posts: 1948
    June 26, 2018 at 6:36 am #1782478

    2003 Mercury 125hp.

    I have a drain plug at the bottom and at the top I have two plugs one for vent and one for oil level. Side by Side.

    Do I just do the traditional way of draining and filling, then wait till it comes out vent or oil level hole?

    Thanks,

    gary d
    cordova,il
    Posts: 1125
    June 26, 2018 at 6:46 am #1782481

    As you are all ready thinking that the vent is for air and oil lever is for oil. I myself I would fill to the oil lever side. Good luck!!

    Charles
    Posts: 1948
    June 26, 2018 at 7:34 am #1782490
    gary d wrote:

    As you are all ready thinking that the vent is for air and oil lever is for oil. I myself I would fill to the oil lever side. Good luck!!

    Alright that is what I was thinking also. Not sure why there is a vent and oil level literally right next to each other.

    Huntindave
    Shell Rock Iowa
    Posts: 3088
    June 26, 2018 at 9:18 am #1782513
    Charles wrote:

    Not sure why there is a vent and oil level literally right next to each other.

    There may be internal baffles or passages not visible from the outside. Does your owners manual give any instructions for this maintenance procedure?

    Charles
    Posts: 1948
    June 26, 2018 at 10:12 am #1782527

    Well then there is that, Thanks Jon.

Viewing 6 posts - 1 through 6 (of 6 total)

You must be logged in to reply to this topic.