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The water lines on the Johnson 210 are now hooked up correctly,
with the supply going into the bottom of the cylinders.
I wonder how long the P.O. ran the motor with the lines plumbed
incorrectly, and how well it cooled the motor?
I didn’t notice any internal damage from over-heating, so
hopefully no harm was done.
I had to re-clock one of the water line’s elbow fittings a cylinder
to regain correct alignment, along with tweaking the lines into
submission so the clamp would fit.
I re-soldered the bad joint at one “Y” with the lines all screwed in place,
not to chance a bad fit by soldering the line on the bench.
The water lines, where they insert into the gear foot, have no grommet,
no room for said grommet, etc., so I may try to work some kind of sealant
around them, as the lines are not that tight of a fit in the gear foot.

Prepare to be boarded!