Lookin at buying a new motor for my 12 foot Valco utility. Lookin at buying a Suzuki 15 hp 4 stroke cause weight is an issue on my boat and its the lightest one in its class. Im hesitant to buy this motor though after I noticed that the cam shaft is driven by a rubber belt. Is this ever a concearn as far as belt slipage-timing issues? Does anyone have experience with this motor?