Old as Dirt!
Join Date: Nov 2008
Location: Tampa Bay Area
Thanked 132 Times in 125 Posts
Rep Power: 8
Re: Flush Outboard
A 20hp engine on that boat is a complete waste of weight/money.
That aside. however, there is a relatively simple method that I have used on the 15hp engine on our dinghy many times. Tilt the motor up and pull a lawn and leaf bag over it. Then, lower the motor back into the water, holding the bag in place with a couple of strips of tape. Then, sink a 36 to 40 gallon trash can and float that over to the engine, shove it down and then pull it up over the the drive, pull it up so that the rim is just above the water level and use a couple of lines to the transom to hold it in place. Than stick a garden hose into the lawn/leaf bag and start filling it up. As th bag fills with fresh water it will displace the water in the trash can that will spill out over the rim. When filled the lawn/leaf bag will press against the sides of the trash can. Fire the motor up and let it idle (do not put it in gear!). After five minutes or so, shut the engine down and slowly tilt it up which will push the trash can/lawn-leaf bag away where it/they can be pushed down out of the way of the engine. Tilt the engine up and rinse the drive off with fresh water and recover the trash can/lawn-leaf bag and you're done.
"It is not so much for its beauty that the sea makes a claim upon men's hearts, as for that subtle something, that quality of air, that emanation from the waves, that so wonderfully renews a weary spirit."