The site that I looked at re: Smart Tabs seems to be oriented to outboards. They show the size/horsepower and ask whether it's used with a 2 stroke or 4 stroke. Are they really for I/O's and if so, which would work for a 1983 16ft Invader with a Volvo Penta AQ125A\270 combo. <br /><br />BTW, I've seen the HP for the 125A rated from 105 to 120. Does anyone know what it actually is?