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The Mariah Owners Club » Maintenance and Repairs » Mercury MerCruiser

bravo 3 new prop shaft seals leaking

Mercury MerCruiser

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Old 04-21-2014, 02:14 PM   #1
 
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Default bravo 3 new prop shaft seals leaking
Took my talari on the water yesterday for the first time since having my prop shaft seals replaced. I noticed this morning that there is a puddle of drive unit oil under the skeg. it's leaking behind the rear prop and has about a one foot diameter puddle on the floor. I really don't think new seals should leak, especially this bad. Any ideas? This thing is turning out to be a nightmare
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1996 Mariah Talari Z240 7.4 Merc Bravo III

As long as you have a few nuts, bolts and screws left over after the job is done, it should work!
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    • Old 04-21-2014, 05:42 PM   #2
     
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    Default Re: bravo 3 new prop shaft seals leaking
    There is a possibility you may have got fishing string tangled in there. My dads out drive drained last season because of that...

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    Old 04-21-2014, 05:43 PM   #3
     
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    Default Re: bravo 3 new prop shaft seals leaking
    It's a possibility. I need to pull the props off and look


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    As long as you have a few nuts, bolts and screws left over after the job is done, it should work!
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    Old 04-21-2014, 10:53 PM   #4
     
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    Default Re: bravo 3 new prop shaft seals leaking
    Did the fishing line ruin the seals?


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    As long as you have a few nuts, bolts and screws left over after the job is done, it should work!
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    Old 04-22-2014, 01:18 AM   #5
     
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    Default Re: bravo 3 new prop shaft seals leaking
    Yeah. I don't know how it gets into the places it did but the string was on the oil side of the seal wadded up. Basically tore seal up.

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    Old 04-22-2014, 05:35 AM   #6
     
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    Default Re: bravo 3 new prop shaft seals leaking
    Oh no. I just had new seals put on this thing too. I've been doing a lot of searching for info on this and found a lot of instances where new seals will leak some until they are run in and seated. If I don't find any fishing line, I guess I can hope that this is the case


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    As long as you have a few nuts, bolts and screws left over after the job is done, it should work!
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    Old 04-22-2014, 12:30 PM   #7
     
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    Default Re: bravo 3 new prop shaft seals leaking
    Paul ,
    There is no reason for the seal to leak unless one of the following happens:
    The fishing line around shaft , as has already been stated
    A groove in the prop shaft itself
    A bent prop shaft
    A bad seal
    Or a bad install of the seal
    What does the marine tech that did your reseal say?
    Ask him to pressure/vacuum test the drive , if it doesn't hold pressure/vacuum , then it is going to get water in the drive
    Water in drive = bad things happen quickly

    JMO
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    Old 04-22-2014, 12:39 PM   #8
     
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    Default Re: bravo 3 new prop shaft seals leaking
    Larry, haven't talked to the shop that replaced my seal yet, but I do remember him saying he had a heck if a time getting it on there. Kinda raised my eyebrows when I heard that. I'm gonna pull the props off later this morning. If there's no fishing line, then it could be a bad install or one of the other things you mentioned


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    As long as you have a few nuts, bolts and screws left over after the job is done, it should work!
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    Old 04-22-2014, 12:40 PM   #9
     
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    Default Re: bravo 3 new prop shaft seals leaking
    Keep us posted Paul.
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    Old 04-22-2014, 12:43 PM   #10
     
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    Default Re: bravo 3 new prop shaft seals leaking
    I'll post my findings. This thing is really turning into a money pit. Found several other things wrong, too, that need attention on top of the seal leak


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    As long as you have a few nuts, bolts and screws left over after the job is done, it should work!
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