Seahorse-- I have the same engine and the same problem. I was told by an Evinrude certified mechanic (and this guy is good he has replaced # 2 piston on my engine after another dealership replaced the powerhead for a problem with #2 cylinder)that he has discussed this issue will BRP tec support on several occasions.
And they are telling him "I will have to live with it" something to do with the changing from low speed jets to high speed jets. I know when I power load my boat it is hesitating before it hits 2000 rpms, and then it jumps on the trailer. NOT
GOOD. I would gladly take my boat to BRP if they can fix this problem. I have been an Evinrude man for 40 years, but this issue has me wondering. And I have the 1 1/2 inch hole in my air box. as the other owner has said this is not an isolated problem. I respect your knowledge, maybe you can help us out. Thanks for you attention. (And my motor runs great when you get it above 2000 rpms or below 1000 rpms) and i am running a 23p Tempest Plus at 5600 rpms<br /><br />
Modified by stratos285sc at 8:47 AM 11/9/2011


Modified by stratos285sc at 9:00 AM 11/9/2011