Hi. I have a Plancraft Sabre MK3 built around 1985/86. It came with a Mariner 2 stroke 75hp outboard. I have been reading that this beauty guzzles a load of fuel. I would ideally like to race around the bay at throttle for more than 10 minutes and also like to slow-boat at times. Ideally the boat should be on the water for around 2 hours at a time. What would be the best recommended size motor for this situation? Attached are pics of my boat.