Re: Water flush attachment for Volvo
If it's a V/P 270 drive, I have never been able to find any muffs that work well with it, so I just either attach my garden hose to the intake side of the water pump and run the garden hose using low-medium water pressure to supply water to the water pump. I got this idea from a V/P dealer...he rarely ever used muffs.
Or sometimes I will just put a garden hose into a large bucket I set next to the outdrive and then have a 4-5' length of hose I run up through the transom plug hole and attach it to the intake side of the water pump. When I have the hose attached, I'll fill the bucket with water and keep the garden hose running. When I start the engine, the water pump starts sucking the water up out of the bucket. Just be careful the garden hose's pressure is high enough so that the water pump does not suck water faster than the water coming in to the bucket from the garden hose, and also make sure either hoses do not come out of the bucket!
Admittedly, both of these are not the best solutions but they have worked well for me over the years.