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Do outboard motors lose power just because they get old?
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<blockquote data-quote="Wistex" data-source="post: 267832" data-attributes="member: 7046"><p>boat #1 2006 1448 alumacraft jon with 2001 9.9 johnson manual start tiller on 15" transom-</p><p></p><p>boat #2 2010 1442 alumacraft jon with 1994 evinrude 15 electric start, long shaft, and remote controls on 20" transom-</p><p></p><p>the 9.9 always feels much more powerful so curiosity made me test hole shot and gps top speed with 325# driver. </p><p></p><p>15 hp on smaller, lighter boat; time to plane 8 seconds, top speed 18.5 mph</p><p></p><p>9.9 on the bigger jon; time to plane 6 seconds, top speed 19.5 mph</p><p></p><p>15 hp motor very quiet- starts easily- runs smoothly</p><p></p><p>9.9 motor quite loud in comparison- starts easily, runs smoothly</p><p></p><p>does anyone have an idea why the 15 doesn't readily outperform the 9.9?</p><p></p><p>should not one expect the 15 to outperform the 9.9?</p><p></p><p>could the 42" wide hull vs the 48" wide hull make the difference?</p></blockquote><p></p>
[QUOTE="Wistex, post: 267832, member: 7046"] boat #1 2006 1448 alumacraft jon with 2001 9.9 johnson manual start tiller on 15" transom- boat #2 2010 1442 alumacraft jon with 1994 evinrude 15 electric start, long shaft, and remote controls on 20" transom- the 9.9 always feels much more powerful so curiosity made me test hole shot and gps top speed with 325# driver. 15 hp on smaller, lighter boat; time to plane 8 seconds, top speed 18.5 mph 9.9 on the bigger jon; time to plane 6 seconds, top speed 19.5 mph 15 hp motor very quiet- starts easily- runs smoothly 9.9 motor quite loud in comparison- starts easily, runs smoothly does anyone have an idea why the 15 doesn't readily outperform the 9.9? should not one expect the 15 to outperform the 9.9? could the 42" wide hull vs the 48" wide hull make the difference? [/QUOTE]
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Do outboard motors lose power just because they get old?
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