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Yamaha 1987 9.9 and 15 difference

DrCoxie

Contributing Member
Hey, I've looked through the parts lists for the 9.9 and 15 hp model to see what the differences are but I can't find anything different in the reeds nor the carb itself. Is it just the displacement of the engine that's different? Usually 9.9 are just downtuned 15 hp engines, is that not the case with these things? Does anybody know what the difference actually is?
 
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