How much does a 9.9 HP Yamaha outboard weight?
How fast does a 9.9 outboard motor go?
Assuming this is a light 14′ utility boat and a standard 9.9, Mercury would recommend a 8.5 to 9.5 pitch prop for the OP’s application and predicts a top speed around 20 mph.
How do you transport a 4-stroke outboard motor?
2-stroke outboards can be transported on both sides, but it’s better to transport them lying on the tiller side. 4-stroke outboards should only be transported lying on the tiller side. For longer breaks in use and for wintering, outboards should be stored upright, for example using a transport stand for outboards.