[Jon G]

Joe for what its worth I have a 115Merc. and it does about 35-36 mph at WOT and will cuise at 25mph. I think the 150 would be a good balance of power and economy it will move the boat with power to spare and won't guzzle the gas like a larger engine would. Its all in what you intend to do with the boat to, if you use it with a light load all the time the 115 would be ok if you plan to use it with a full load normally then go with the bigger engine. My engine is pretty new so a repower is not in my future but I think I'll go with a DI 150 when I do. If you search under 115 you'll find a couple other posts here as well.