Hello...I'm a newbie (just inherited my deceased father-in-law's boat: 1964 Reinell 13-ft (we call it the 'Bat Boat' because of the fins!))...what a great BB! I am in search of a motor for this boat and I think I found a candidate which I will take a look at Saturday. A few questions: how can I determine the year of the motor based on the following: Johnson 40 hp SuperSeahorse, serial #2020446? How do I know if I need a long or a short shaft? The current owner tells me that this motor ran well 3 years ago, the last time it ran. How do I want to go about starting it if it's been sitting for three years? What gas/oil mixture ratio do I use? What do I look for to determine if this motor is in good condition and worth $300?