Quicksilver Screw Kit, Lower Drain 79953Q04

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Lower Unit Gear Lube Drain and Fill Hole Screw and Seal 79953Q04 is used with 3/8 - 16 drain/fill hole screw on all MerCruiser sterndrives, Mercury and Mariner outboards except the Verado series. It is very important to use the seal to make sure the drain/fill hole screw seats properly to retain the gear lube in the gear case and keep damage causing water out of the gear case. Used with 3/8-16 drain and fill hole screw on all MerCruiser sterndrives, Mercury and Mariner outboards except the Verado series Must use this seal to properly seat the drain/fill hole screw in the lower unit Helps prevent gear lube from leaking out and water from seeping in to the gear case causing serious damage This is the non-magnetic plug screw version Show more