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2007 f115tlr drive shaft

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  • 2007 f115tlr drive shaft

    hey guys I purchased a used boat that has this motor with just under 400 hours. while replacing the water pump I noticed that the woodruff key was damaged (rusting due to improper maintenance i believe) I had to kind of jimmy it back into the impeller, I have put about 30 hours on since with no issues but this problem is still in the back of my mind. Does anyone know what it would cost to repair the damage? i believe it will need a new shaft, keys, seals, grease, ect.... or is it cheaper (i know its easier) to buy a complete lower unit for around 1700 bucks? I am not comfortable enough to kind of do that work myself so it would defiantly have to go to a certified dealer. thanks for any and all inputs!

  • #2
    Originally posted by planseafishing View Post
    hey guys I purchased a used boat that has this motor with just under 400 hours. while replacing the water pump I noticed that the woodruff key was damaged (rusting due to improper maintenance i believe) I had to kind of jimmy it back into the impeller, I have put about 30 hours on since with no issues but this problem is still in the back of my mind. Does anyone know what it would cost to repair the damage? i believe it will need a new shaft, keys, seals, grease, ect.... or is it cheaper (i know its easier) to buy a complete lower unit for around 1700 bucks? I am not comfortable enough to kind of do that work myself so it would defiantly have to go to a certified dealer. thanks for any and all inputs!
    The woodruff key should fit very snuggly in the main shaft.

    Removing it, is often the hardest part of the job.

    I'd clean the shaft, / notch, get a new key and see how well it fits. You should have to gently tap it into the shaft. As long as it's snug, your good.

    I'd do that way before buying a new lower end. If you replaced the WP impeller, you can remove the key. With a new key, and if the impeller is not damaged, it should easily slide over the key / shaft.
    Last edited by TownsendsFJR1300; 01-17-2019, 08:34 PM.

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    • #3
      thanks for the response, maybe i will try that prior to jumping the gun.... ! 10 bucks is a lot cheaper than 1700!

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      • #4
        Pictures??

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        • #5
          Originally posted by pstephens46 View Post
          Pictures??
          Sure:

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          • #6
            Very funny sir

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            • #7
              Originally posted by pstephens46 View Post
              Pictures??
              Sorry, I am currently deployed and away from my baby, just trying to get some input from others too see what im working on when i get home.... but it does look very similar to the pick above with a little corrosion nothing major from this picture... the key is differently worn out i didn't realize that the slot was a moon slot shape... i thought some of the key may have broken off in the shaft... so thanks for posting that pick as well!

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              • #8
                Originally posted by planseafishing View Post

                Sorry, I am currently deployed and away from my baby, just trying to get some input from others too see what im working on when i get home.... but it does look very similar to the pick above with a little corrosion nothing major from this picture... the key is differently worn out i didn't realize that the slot was a moon slot shape... i thought some of the key may have broken off in the shaft... so thanks for posting that pick as well!
                You can bugger up the shaft but you gotta smack it pretty hard with a sharp object.

                You should be good and yes, it IS a "moon shaped key"..

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                • #9
                  Originally posted by planseafishing View Post

                  Sorry, I am currently deployed and away from my baby, just trying to get some input from others too see what im working on when i get home.... but it does look very similar to the pick above with a little corrosion nothing major from this picture... the key is differently worn out i didn't realize that the slot was a moon slot shape... i thought some of the key may have broken off in the shaft... so thanks for posting that pick as well!
                  They don't really wear. They do get abused by some who try to remove them in a frustrated angry state of mind. I learned the hard way myself.

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                  • #10
                    Originally posted by TownsendsFJR1300 View Post

                    Sure:

                    This lower is far too clean. It begs to be used. Diet should consist of more sand and mud.

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                    • #11
                      Originally posted by pstephens46 View Post

                      They don't really wear. They do get abused by some who try to remove them in a frustrated angry state of mind. I learned the hard way myself.
                      sounds about right because as soon as i lifted the impeller it fell out, my first boat so im learning

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                      • #12
                        I have never had one fall out, never.

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                        • #13
                          I have a feeling someone did a little sanding on the key or grinding on the shaft to make it easier to get in and out

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                          • #14
                            I have put them in a vise and filed the sides.

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                            • #15
                              Originally posted by 99yam40 View Post
                              I have a feeling someone did a little sanding on the key or grinding on the shaft to make it easier to get in and out
                              would that ruin the integrity of of the shaft?

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