I have read in a book and also heard that it is harmful to troll with anything bigger then 25 hp motor. I have a '78 yarcraft with a 35 hp that came with trolling rod holders and that's what I use it for. Seem to work good. Now I purchased a Sylvan fish and ski with a '96 115 Merc but don't have the funds to supply a kicker. How long can I idle around without doing damage to the motor? Can I troll with this motor without doing harm to it if it's just occasionally? I like to putt around to save gas. Is it ok to putt around if I open it up a little once in awhile?