As an alternative to using (or making) a Fake-A-Lake, here's what I've done:
1. Disconnect the raw water intake hose from the outlet side of the V-drive (i.e., the hose that goes from the V-drive to the raw water pump at the front of the engine -- along the starboard side of the engine).
2. Find a garden hose nozzle that is a snug fit inside that hose.
3. Put the nozzle on a garden hose, turn the nozzle open all the way, and stick it into the intake hose.
4. Turn the water on all the way at the faucet.
5. Start the engine and make sure you have a good flow out the exhaust tips. Don't rev it too high, and
DON'T PUT THE TRANSMISSION IN GEAR! You can ruin the prop shaft strut bearing by doing that.
6. When the engine is warmed up, shut it off, then turn the garden hose off, and then reconnect the raw water hose to the V-drive.
Plus, there's a better and faster way to drain
all the oil than using the dipstick tube. Your engine has an E-Z Drain hose connected to the drain plug at the bottom of the crankcase. Go to the link below to see how I hooked the larger suction tube from a pump to the E-Z Drain hose:
http://www.wakeworld.com/MB/Discus/messages/65921/100113.html?1077646658