I tore the water pump apart on Bailer #2 this morning.
The two outboards were purchased in different years,
and different States, but they both had the same
Lord J-7598 replacement impellers.
Evidently, they were about the only choice even
years ago.

Also interesting is that the impeller wouldn’t touch the
liner on the slack side of rotation. I realize the impeller
is old and has taken “set”, but it makes me think there
wasn’t a whole lot of “vane tension” on the liners
using the Lord impellers. I wonder if the original Scott
impellers were better? They certainly designed different
than the Lord replacement impellers.

I’m awaiting a Sierra impeller that’s has a slightly larger
OD than the Honda one, and see if I can get if to work
without adding a band in the liner to reduce the cavity diameter.
Time will tell.