Home › Forum › Ask A Member › 1997 Johnson 15 hp dropping a cylinder?? › Re: 1997 Johnson 15 hp dropping a cylinder??
April 17, 2018 at 1:51 am
#74152
quote Mumbles:
quote Richard A. White:
owner realizes his boat is too small for this motor..LOL said it scared him.
That’s what I’ve said before, they pack a lot of power in a small package! 😀
Mumbles has a video of him running a 15hp at about 4500rpm,about the same top end as a 9.9,he then takes it to full throttle about 5500 rpm ,and thats where the additional 5 Hp kicks in.It breaths better with the less restricted exhaust and the bigger carb throat than the 9.9 as i understand it.
I have a ’89 15 ,seems like more than 5 hp at the top end.
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