Andrew - too bad it wasn't as easy as pouring sealant down the cooling passage. Unfortunately, the forward/reverse shift mechanism also runs inside the passage, from inside the hull down to the gear case. Not so simple, this one!
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Update: the boat is still floating! (Sending this message from on board, actually.)
I haven't yet opened the top to see if any water entered the cooling passage from below.
Also haven't done any more e-motor fiddling, not counting moving the boat a couple of times with the trolling motor (once to go back to the harbour where I launched in order to put up the mast).
The
Green Grand Prix last weekend, and the
EV Expo this Saturday tinkering time is at a premium.
Next week should see some action on this project.