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  1. K

    Using timesert for thread repair in cast aluminum

    Hi, I need to use a timesert to repair the threads for the lower unit oil plug on my 20HP 2008 Mercury outboard. According to Mercury Customer Support this plug is made of zinc plated steel and the lower unit is cast aluminum. The timesert kits come in zinc phosphate plated carbon steel or...
  2. K

    Mercury 20HP - Stripped lower unit plug

    Hi All, I have a Mercury 20HP 4 stroke outboard (Model - 20ML, Serial - 0R255347). While changing the lower unit oil I have managed to strip the threads in the aluminum casing while tightening the top (vent) plug. I have done some research on how to fix this and it seems the options are...
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