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Thread: Lower unit seal

  1. #1
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    Smile Lower unit seal

    I have discover my out put seal on My V6 200 hp bLACK MAX 1989 is leaking . Can someone tell me how to change it or should I take it to a dealer? I am fairly good with mechanical issues ,

    Thank You in advance ,,, Jim

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    I usually cheat a little - go to the mercury dealer, buy the parts, and get some advice. I am in the process of doing mine on a 99 225 efi but I can't beleive it would be too different. This will give you an idea of what you are in for. There are two seals - an inner and outer - on the bearing carrier. The bearing carrier is held in with a retaining ring. You need to remove the threaded retaining ring (easier with the special tool) and then pull the carrier. If it is a salt water engine it is a struggle due to the corrosion - either way it seems some well placed heat from a torch seems to be required. My retaining ring was frozen and had to be cut out. I then broke the bearing carrier because I did not use a torch and did not have the proper carrier puller. I am not a mechanical idiot having replaced two power heads in one year. This just seems to be one of those things that you need to try to get the hang of!

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    Thank you for the help I will make a "special tool" to thread out the retaining ring I have a torch if required and I run in only fresh water so maybe it will come out easier .....

    Thank you again

    Jim

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    subscribed ---- proper tools and torque or you will have more problems than a leaking seal . jmo
    MITCH HARDEE 803-974-0350 --- 95 CUSTOM BASS RR STV/300drag-- 2004 STV RR/300drag---14ft fastcraft/12in/ssm--F.I. 3cyl -whittled from 300-drag --2008 FTPB STV RR( POC FACTORY BUYBACK) IRATATE A LIBERail --missspell som'um--SPONSORS --THOROUGHBREDS INC.

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    Advice is wonderful but its not experience unless your time is worthless you can buy a spanner nut wrench for 50.00 or so.on the internet, the carrier puller probably not going to find one online cheap there are two versions available both work both over a 100.00 unless your are wanting to learn to do lower units and rebuild them and replace seals all the time then take it to somebody . im a lower unit rebuilder and very seldom do i resort to heat , but i have and have also cut plenty of case nuts out at 1'' at a time there is more then just R&R on this project like a small press with the proper rigging to push seals in and out and dies for that and so on .
    Last edited by TEXAS20225; 09-23-2011 at 12:04 AM.

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    Lower unit seals

    Thank you for the advice I am thinking now that this first time I needed a seal replaced ( I have owned boats decades ) maybe I will pay someone to do it . What is a fair price and I guess I should do both seals I know for sure the output seal is leaking ( ring of milky substance ) .

    Thank you for the help .... Jim

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