Here are some pictures from a manual.
It has a two stage pump which means there are 2
metal impeller blades that last indefinitely. When
you pull the motor over its almost circulating
water before the motor starts. I’ve never had
one of these but I’m familiar with the pump
from other models.
Tubs.
A "Boathouse Repair" is one thats done without having tools or the skills to do it properly.