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  1. #18
    Senior Member ApexPredator's Avatar
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    Re: Is 90 hp enough?

    I bought my 18' weldcraft with a 90hp honda and after 3 years I swapped it with a 115 yami. Such a good decision. The 90 will get the job done and since the boat is used I wouldn't let this hold you back from picking it up but a larger motor will make every part of the boat experience better (other than service cost o/c).

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  3. #17
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    Re: Is 90 hp enough?

    With the right prop that power will be fine.You can prop it to pull 4 fat guys on plane easy but may not be a 40mph boat or you can prop it to get into the 40's and you can eat a sandwich while it gets on plane.Its all about the right prop for what you plan on doing.

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  5. #16
    Senior Member Waterdog's Avatar
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    Re: Is 90 hp enough?

    I guess it depends where you are going to mostly fish. If you plan to fish mostly lakes 4000 and higher then you may want to consider more horsepower. But most of us California guys seldom fish lakes at the higher altitudes. In the last 10 years I can count on one hand the number of times I took my boat above 3000 and then there was only one or two passengers and it ran great. 99% of the time I fished lakes close to sea level and the delta. So if most of your fishing and boating is valley lakes and delta then you should be just fine with the 90 hp. Occasional trips to lakes like Stampede, Tahoe, Donner etc. 90 hp should serve your purpose.
    The bottom line you need to test drive the boat and then form your opinion.
    Hunting, Fishing and Labrador Retrievers and at the end of the day a glass of Buffalo Trace Whiskey- Life is Sweet.

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  7. #15
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    Re: Is 90 hp enough?

    Let me clarify my first post. Yes, a 90 will work just fine. A 115 would be better and if the boat is rated for it, a 150 would be perfection. With the 90, you will notice a significant performance loss at around 4000 ft and above. Combine that loss with you three buddies aboard and you may be dissapointed. You can compensate for some of that with a prop change but it will still be sluggish. I had the 150 on my 20ft KingFisher Discovery and it was impressive at sea level but even that motor at Pyramid (almost 4000ft) was sluggish with 4 aboard. Because of that, I put the 250 on my 22' North River SeaHawk and then had them do the firmware upgrade to make it a 300hp motor. It never lacked power even with a full load and I never needed a second, high altitude prop.

    That said, if it's got the 90 on it now, run it and see what it's like. If it works like you want then a second, high altitude prop is a cheap fix for those time when it's needed. If you don't want to change props or you start feeling performance issues compared to similar boats with more power then think about upgrading.

    The North River's are great boats but they are heavy compared to most any other aluminum boat out there. The good is that you can't hurt them, the bad is that they sometimes need a little more power than other boats.

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  9. #14
    Senior Member burninfuel's Avatar
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    Re: Is 90 hp enough?

    Wes you beat me to It

    http://fishsniffer.com/forums/showthread.php?t=137847


    see you on Pyramid in October
    Last edited by burninfuel; 08-12-2019 at 02:41 PM.

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  11. #13
    Team Fish Sniffer AnglingWes's Avatar
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    Re: Is 90 hp enough?

    I just picked up a 2020 Duckworth Advantage Sport 18 w/ a Yamaha 90 last week. Only been on the water for a few hours, but can say that the 90 is plenty.

    IMG_0618.jpg

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  13. #12
    Senior Member BigUnInDaBoat's Avatar
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    Re: Is 90 hp enough?

    I have a 75hp Merc on my 18' Crestliner, and it pushes it just fine, my top speed is about 36 mph.

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  15. #11
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    Re: Is 90 hp enough?

    90 is plenty , mariner is a 12 degree hull. If price is right do it.

    I had the Seahawk with more deadrise and the 90 was enough .

  16. #10
    Senior Member Seon's Avatar
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    Re: Is 90 hp enough?

    If the price is right and the NR is solid then I'd buy it. You could always repower later if you're not satisfied with the 90.
    23.5' Duckworth Navigator, Yamaha F150

  17. #9
    senior member RideNfish's Avatar
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    Re: Is 90 hp enough?

    Quote Originally Posted by SteelyMan View Post
    I had a 18 ft North River Seahawk, off shore bracket.
    Had a 8 hp kicker,,,,,,, 90 hp Suzuki main motor, plenty of power.

    Is it a Seahawk or Mariner ??
    Mariner I believe. No offshore bracket. Doesn't say in add but when I talk to the guy I would get all details.

    Here is one like it.

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