Merc trim system cleaning

Discussion in 'Sterndrives' started by glastronjohn, Dec 11, 2009.

  1. glastronjohn
    Joined: Nov 2009
    Posts: 7
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: DFW, Tx.

    glastronjohn Junior Member

    I have 1990 merc 350mag, Alpha gen 1. The trim oil has been milky for the past few years so I'm cleaning and rebuilding the system. The trim pump has a plastic resivore with the a single bolt through the bottom. It's on the bench. I cleaned out the resivore and now want to get the bad oil out of the pump. Can I cycle new oil through the pump with it on the bench, or will I break something with the hoses off, or is there a better way? I want to get all of the old oil out before I put it back together.

    I'll tackle the cylinders next. I have spanner wrench for the caps, 2 new seal kits and the merc instructions. I plan to clean the hoses and manifold out with solvent and an air hose. Any other suggestions?
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