I have a 2010 Alumacraft 165 Navigator with a 2011 90 hp E-tec motor.
With my wife,myself,fishing gear, trolling motor , we are able to get 36mph at 3600 rpmsWOT.
My question is , Is this about normal for this boat? I forgot to mention, I have a alum.17pitch prop.
I am completely new to boating . If more info is needed please let me know. I think we have 10hrs on motor.not completely sure.
Thanks for any help from this rookie.
Your numbers do not jive. Your tach is wrong, you may have a typo, or perhaps both as your top rpm would be more than 3600 rpm at full speed. I suggest that you talk with a technician and/or someone familiar with your rig at your dealer about the rpms, speed, and overall performance.
For a rough comparison, here is a link to a factory boat performance test with a 75hp on a 165 Navigator. A stainless steel propeller will always outperform an aluminum prop.
09-14-2011 11:25 - edited 09-14-2011 11:25
4600 is still not correct, if you are getting 36mph at wide open throttle. See your dealer and have him go for a ride with you using his laptop to test the accuracy of your tachometer. Your motor should have a top rpm between 5000 and 5500rpm with around 5200 or so being ideal with an average load.
I have a 2007 Lund Explorer tiller model with a 75 E-TEC. I'm rigged on the third hole and have it proped with a 13.25" x 15" BRP Rogue prop. I'm getting 5300 RPM @ WOT and 38 MPH on the GPS. You need to get your RPM up to 5200. I'd suggest a Rogue prop. Good luck and enjoy your E-TEC!