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engine surge when trimming up

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  • engine surge when trimming up

    I have a Yamaha 90 and while coming back from fishing today it got on plane ok but when I went to trim up the motor the engine started reving up and down or surging.

  • #2
    Dave,
    Could it be that you are just trimming up too far and the prop is ventilating (cavitating) - sucking air and then catching hold?
    Ken K

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    • #3
      no I barely trim it up. I took it where I bought it and I traded a Key West 1720 sportsman for a Hewes Redfisher 18. We do a lot of back country flats fishing so it's a better fit. Not to worry, It has a 115 Yamaha 4 stroke on it. So I'll be around. What do you thinkl of that motor?? See ya around. THanks for the help.

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      • #4
        Dave,
        Well, welcome to the Maverick-Hewes-Pathfinder family [img]smile.gif[/img] (I have a Pathfinder 1806V) .
        Come over and join us on the MHP forum at www.maverickboats.com .
        I have not personally had any experience with the Yamaha 4-strokes (yet), but a lot of members on the MHP forum have them, and you can get a lot of feedback there.
        For parts, of course, the sponsor of this forum, boats.net, is a great source.
        Good luck [img]smile.gif[/img] ,
        Ken K

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