I did this at TechShop Menlo Park. http://www.techshop.com
If you have a boat and an outboard motor but no mount for it this instructable may help you get started on your mission. 

Step 1: Find free wood

Picture of Find free wood
Someone's trash may be your treasure. I highly suggest the wood scrap bin in for finding nice pieces of wood you can work with for this project. Man made layered wood is stronger but anything sturdy is good. It will be fiber-glassed by the end anyways