Mower boat engine

Im looking to get a cheap outboard on my little boat..enyone know if its a big job to put a pushmower engine on a outbord stem?

Ive seen horizontal shaft motors used more often - just hook the motor to a bracket that bolts to the back of the boat, then a simple shaft and propeller added on - verticle shaft motor youd need a ujoint to direct the driveshaft horizontal , and mount a couple inline berings to support it.

Here are the monsters that im putting together

bench test the push mower engine without the blade before you put too much time in it.
most use the blade to make up the lack of weight on the flywheel and wont run right, not to mention they can be a wrist breaker trying to start them

havent started it yet but it took me 25 minuts to get it al taken apart end put back together..im gonne make the brakket tomorrow and just se if it works ok