I bought a 13' Four Rivers Marsh boat and just put on a 5.5hp honda Mud buddy long tail on it and took it out this weekend and was not impressed at all. I guess i should have known going from a HD45 to a 5.5hp was going to be slower. Well not for long!!! Just order up some performace parts for it. Turns out that this 5.5 honda motor is a big hit in the go-karting industry and guys are getting anywhere up to 25hp to 38hp freaking crazy. I'll be sure to keep all you small marsh boat guys posted on the build and she what i can get this thing to do. I know i'm not right in the head i just like to go fast.