Picked up this pump last Saturday. So far I’ve learned
in was made in 35 or 36, according to Hunn’s book.

Did Evinrude ever produce a parts or owner manuals for
these?

Were they sold thru dealer networks to the public, or only to fire departments,
Forestry, etc?

Anyone know if later Lightfour internals fit the earlier Imperial versions?

Just realized this morning that the pump must supply cooling water to
the engine, but not sure how it all works yet. It has a lever that says
“Flush or On”, presumably for the cooling system.

The power head is froze up, but didn’t look bad peeking into the cylinders,
from what little I could see.

Anyone have one of these units, or have literature on these pump motors?
Thanks.