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Thread: 2007 90 hp mercury 4 stroke outboard

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    Default 2007 90 hp mercury 4 stroke outboard


    Hey guys
    I have a question
    My motor seems to spin out at times. I can be running down the lake at 5k. Rpm and all is good then for some reason the boat quits pulling and rpms go up. I replaced the bushing in the prop and it didn't help. Any ideas? Maybe lower unit?

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    Barnacle Bill's Avatar
    Barnacle Bill is offline Super Mod and 2014 Crappie.com Man of the Year * Crappie.com Supporter
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    That is classic symptom of a spun hub in the prop. Recheck it.
    Fair Winds and Following Seas

    Bill H. PTC USN Ret
    Chesapeake, Va

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    Cray's Avatar
    Cray is offline Crappie.com 2019 Man of Year, Supermod & Moderator of the Mechanics Forum * Crappie.com Supporter
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    Rick, does yours have the flo torque hub with the plastic insert. If so it could be you don’t have the prop nut quite tight enough. Those things have to be torqued pretty tight to hold.
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    Cray's Avatar
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    Rick, does yours have the flo torque hub with the plastic insert. If so it could be you don’t have the prop nut quite tight enough. Those things have to be torqued pretty tight to hold.
    Proud Member of Team Geezer
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    Quote Originally Posted by Cray View Post
    Rick, does yours have the flo torque hub with the plastic insert. If so it could be you don’t have the prop nut quite tight enough. Those things have to be torqued pretty tight to hold.
    It does have the plastic insert. I will retorque it. Can I buy a new prop that doesnt have the insert?
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    Flow torque reflex hub

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    Check termostat. For being stop up

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    If the hub is good, I'd say that the motor is either mounted too high or trimmed out too far. Allowing the prop to ventilate. I'm still trying to figure out if the comment about the thermostat was serious or if it was a blinker fluid kind of thing.
    I'd rather be fishing.
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    I didn't understand the thermostat question either but what is blinker fluid? Did not understand either comment.
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    Quote Originally Posted by Stubby24 View Post
    I didn't understand the thermostat question either but what is blinker fluid? Did not understand either comment.
    LOL!!!.... Blinker fluid is a term used by folks that are either trying to mislead the listener or are talking about something they know nothing about. It's used to imply that if your vehicle blinker isn't working, it may be low on fluid. (Obviously not the case).
    I'd rather be fishing.
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