Re: 9.9 evinrude carb.info
Mike,<br /><br />That's a long read, but I did take a few minutes to review the parts fiche a little closer.<br /><br />I compared both 9.9 & 15 models from 1990, 1991 & 1992.<br /><br />The following parts use the exact same p/n for both hp's in all 3 years:<br /><br />Reed plate: 390050<br />Inner exhaust: 330440<br />Cylinder & crankcase: 396010<br />Cylinder head: 432765<br /><br />The only part numbers that changed were complete carburetor assemblies. On closer inspection, the differences between 9.9 & 15 carbs are the carb body (most likely the inside diameter of venturi) and the jetting.<br /><br />These are the most common "different" parts to obtain the hp differences. If there are other small differences, they didn't jump out at me.<br /><br />I would suggest finding a local friendly dealer who might allow you to look thru the 1991 parts catalog/micro-fiche and you can make a more detailed search, it does appear though that the only difference is the carbs.<br /><br />-John
