Damaged F150 prop

  • reddog
    Posts: 807
    #1239153

    3 weeks ago, trying to get my boat off the trailer in low water conditions, I sucked a softball sized rock up into the prop. It hit so hard, it killed the motor.

    Upon inspection, it bent the prop shaft 15/1000s and put a 3/8 inch dent/rise in the cavitation plate..

    I’m having a new prop shaft, bearings and seals installed, but in talking to a insurance man (not my insurance man), he said I should replace the whole lower unit and make it new again, rather than have the cav plate repaired/straightened.. This motor has 15 hours on it..post breakin..

    Your thoughts..
    WWYD?

    swlund
    Cuba City, WI
    Posts: 395
    #1124308

    I would go with what my repair shop suggested.

    Brent Yeakey
    Bloomer, WI
    Posts: 553
    #1124316

    Those Yamaha 4 Stroke 150’s have a cam shaft balancer in them. If you hit something hard enough to kill the motor you need to have that balancer inspected. If the balancer is shot and you keep running it you could destroy the engine.

    denver
    farmington,mn
    Posts: 123
    #1124327

    Better replace it and not have to worry about larger bill in the future.

    reddog
    Posts: 807
    #1124349

    Quote:


    Better replace it and not have to worry about larger bill in the future.


    How much is included in “it”? Explain..

    Eric Rehberg
    Eau Claire, WI
    Posts: 3071
    #1124401

    Quote:


    3 weeks ago, trying to get my boat off the trailer in low water conditions, I sucked a softball sized rock up into the prop. It hit so hard, it killed the motor.

    Upon inspection, it bent the prop shaft 15/1000s and put a 3/8 inch dent/rise in the cavitation plate..

    I’m having a new prop shaft, bearings and seals installed, but in talking to a insurance man (not my insurance man), he said I should replace the whole lower unit and make it new again, rather than have the cav plate repaired/straightened.. This motor has 15 hours on it..post breakin..

    Your thoughts..
    WWYD?


    At the very least you will want to replace the lower unit, fix or replace the prop and have the balancer pulled off and inspected.

    You/insurance company will be farther ahead to replace the lower unit instead of replacing the prop shaft and trying to straighten the cavitation plate. More than likely the cavitation plate wont straighten out anyways.

    If you dont replace the lower unit you will want all the gears and the drive shaft inspected to make sure they are not damaged. I would worry about the drive shaft possibly being twisted and possibly some teeth missing on the gears.

    Like mentioned you will also want the balancer inspected. If any of the fiber gears on that may have broke off or shreaded that will get into your oil and plug up the screen, therefore restricting oil to the motor and causing it to blow up.

    I would fight the insurance man tooth and nail until he agreed to pay for a new lower unit and to inspect and repair if nessasary the balancer.

    Any questions feel free to give me a call or a message.

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