Let me start by saying I don't have all the info that I know I'll be asked for. My tack is not working and I'm working on getting it fixed ot replaced. About a month ago I went out early in the morning with my son and the lake was pretty still due to lack of people. So I decided to open it up and see what the speedo said. The fastest I could get the speedo to register was 26MPH. Thinking that there ain't no way I'm only doing 26MPH I borrowed my supervisors GPS. On GPS I was only able to get up to 30MPH. My question is do you think that a 79 115HP erude should be able to produce more MPH than 30. Granted I know that being in Colorado I'm at a higher altitude than probably most of you but surely I should be able to get more than what I'm getting. I don't know the pitch or size of the prop but will try to get that info this week.