Thread: Outboard bottom gearbox

Give it a run (Prop turning) then immediately drain 100ml into a clean dry plastic bottle.

Tape a magnet to the plastic lid and turn upside down and leave for 12 hours.

Leave the magnet in place on the lid and remove the lid to inspect what may be stuck there.

You will usually find a tittle metal, however heaps of fine stuff or big lumpy bits and you will likely have a problem.

When draining, note what water there may be present (Seals gone)

If nothing drains out because a) no oil in the box or b) the drain is blocked with lumpy bits.... then you could forgo the magnet test and jump straight to the worst conclusion.