on a volvo with the raw water impeller mounted to the crank snout, the bag wont work.
as Alldodge pointed out, you need water pressure to push water to the impeller.
you would be better off getting a volvo neutra-salt system and just hitting the button as you come to the trailer.
If you're into that, go for it. Me, I take one of my many dwell meters, set dwell while doing a spring service, then don't think about it again for a year
I normally set dwell while cranking as I am adjusting the points
Hydraulic seals last about 15-20 years
Most like the piston seals are leaking and bypassing the piston.
Easy test, lower outdrive, pull the up hose, then press down. If the piston seals are bad, oil will come out the ports up ports in the cylinders
So spent some time cleaning out a portion of the garage. Found the canvas bow brackets I bought for the boat.... At least 8 years ago.
Pulled the canvas back, and Florida humidity and frogs claimed the 3 bench seat tops
Fixed the canvas to keep water from pooling
Measured up the boards. I...
Have insurance and wear PFDs. It may be ok, it may sink
Since rot starts at the keel and goes up, and the floor rots 10 years after the stringers. I personally would want to fix it before bringing loved ones on board