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It is currently Thu May 16, 2024 10:50 am
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[ 6 posts ] |
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banded-mallard
MMT 1000 Club
Joined: Wed Oct 07, 2009 8:18 pm Posts: 4310
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Outboard swap speeds
Finally got my outboard swapped out. Have a 2 stroke yamaha 70 tiller. Currently the motor is mounted with the cavitation plate about .75" above bottom of hull. Is currently has a 18p 3 blade. Had about 10 gallons of gas up front, and when I hammer it, jumps out water like a hydrostream. It hits 40 quick, but can't trim, bounces to much. Will prob have to move battery up front under deck to add weight up front. I also noticed that my trim tabs on my hull were bent down slightly to keep my kawasaki from porpoising.
What kind of speeds are you guys getting with outboards on these hulls? And if someone has a yamaha 70 2 stroke, what pitch prop you running?
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Sun Dec 10, 2017 8:02 pm |
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dead animal
MMT 1000 Club
Joined: Fri Jan 16, 2009 3:18 pm Posts: 1726
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Re: Outboard swap speeds
if u getting 40 out of that 70, u need to just be happy and run it.
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Wed Dec 13, 2017 7:48 pm |
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MaXXis85
MMT Elite Member
Joined: Wed Jan 14, 2009 7:23 am Posts: 6233 Location: Tarkington, TX
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Re: Outboard swap speeds
Its going to cost a jackplate and a good prop to gain speed. See if that cost is worth it.
_________________ Bayou Surface Drive 337-351-0362 Tarkington, TX 77327
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Thu Dec 14, 2017 7:50 am |
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CypressCritter
MMT F.E.
Joined: Tue Aug 26, 2014 10:36 am Posts: 822 Location: Jefferson TX
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Re: Outboard swap speeds
My outboard bounces also above 50 mph. With 9 adults and 3 kids it will only get to 47 mph problem solved!
_________________ SEAARK FX 2472 CC Merc 150HP 4Stroke(CypressCadillac) Uncle J Custom - 19x54 CC Skiff w/40XD GTR
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Thu Dec 14, 2017 8:23 am |
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banded-mallard
MMT 1000 Club
Joined: Wed Oct 07, 2009 8:18 pm Posts: 4310
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Re: Outboard swap speeds
It could very well be my trim tab that I tweeked to work with the PD. I just haven't had the time to hammer it straight and see if it helped. From 3/4 to WFO is really no change in speed due to I can't trim.
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Fri Dec 15, 2017 10:11 am |
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50fps
MMT 1000 Club
Joined: Tue Jan 13, 2009 6:42 pm Posts: 2377 Location: West Coast Wisconsin
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Re: Outboard swap speeds
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Fri Dec 15, 2017 11:01 am |
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