Sorry to hear about
that. Sounds like it wouldn't hurt to add a small blast cooling tube
for the EWP motor. No point in torturing the little motor that you're
trusting your life to :-)
That being said, I would suspect that you
have a bad bearing, which would explain the odd noise you heard before, and the
recent lockup. Certainly, you're not subjecting it to any more heat
or stress than it could get in a car, so I'd have to assume that you just
got a unit that was defective. I'm not sure if they'll honor the
warranty, but if it were me, I would buy another unit, rather than fly with
the one you have.
Here's another thought. Did you
confirm that it really didn't blow the fuse when you replace it? If the
pump was seized, and you put power to the motor, it should have blown the
fuse. If it didn't, that would suggest an internal thermal
protection device in the motor, and I'd be mighty interested to know
what temp that thing trips at. Since the fuse blew initially, we can
assume that the thermal protection had not kicked in prior to blowing the
fuse. In other words, heat from the electrical load of the struggling
motor did not trip the thermal protection. Next, the motor was heated
further by the engine compartment, and 240 degree
coolant. Did the thermal cutout occur due to the high
operating temps? If that's the case, it would be disturbing, since high
temps could result from a number of other problems, and the last thing you need
is your water pump to quit at the same time. Keep in mind that this whole
paragraph is pure speculation, but is certainly something to think
about.
Good
luck,
Rusty