Parnelly Posted July 26, 2015 Report Share Posted July 26, 2015 Hi all, I have an Merc 18XD and from my understanding there havent been parts available for this motor for some time. After a weekend trip out with the motor, The lower unit was completely dry. Not even any water inside.There was no shards on the magnet screw only a small amount of sludge, that when rubbed in my fingers was simply that. No metal shavings at all. Motor ran fine the whole time out and gave no indication of anything wrong. I imagine there is a leak somewhere, but would that not allow water in to the unit? Any suggestions on what this might be caused by? What could I do if there are no parts available to repair? Thanks. Ben. Link to comment Share on other sites More sharing options...
2 tone z71 Posted July 26, 2015 Report Share Posted July 26, 2015 Seals are gone ...fishing line or wear etc ..aftermarket like Sierra should have those seals ...good thing you caught it early Link to comment Share on other sites More sharing options...
2 tone z71 Posted July 26, 2015 Report Share Posted July 26, 2015 Or somebody somewhere will have a bolt on gear case in a boneyard somewhere Link to comment Share on other sites More sharing options...
glen Posted July 26, 2015 Report Share Posted July 26, 2015 When is the last time you know it had oil. My old motor would be full but oil and water from a bad seal at the prop. Put oil in and try it again. Might be the easier way to go. Link to comment Share on other sites More sharing options...
Parnelly Posted July 26, 2015 Author Report Share Posted July 26, 2015 (edited) Thanks for the replies fella's. I never knew there were aftermarket parts for these. Only ever thought to go merc. Appreciate that. I have topped it back up with Merc gear oil. The plan is to get it out once again to see what happens. Thanks again for the help. Ben. Edited July 26, 2015 by Parnelly Link to comment Share on other sites More sharing options...
Garnet Posted July 26, 2015 Report Share Posted July 26, 2015 Get a piece of cardboard under it to check for leaks. And buy ear muffs $10 and run it in driveway. Link to comment Share on other sites More sharing options...
Mister G Posted July 27, 2015 Report Share Posted July 27, 2015 A simple pressure test of the lower unit will reveal any leaks.. Link to comment Share on other sites More sharing options...
Freshtrax Posted July 27, 2015 Report Share Posted July 27, 2015 (edited) If it was empty with no water in it right after pulling out of the lake. I would take a guess exhaust is displacing the fluids ......if it was a while after pulling out the ramp it could have filled with water then drained out ..... I'd be replacing prop seals, shift seal, shaft seal , the entire waterpump and often overlooked the rain bung gaskets . Amazon has great deals on Sierra parts usually and at your door in 2-3 days. Edited July 27, 2015 by Freshtrax Link to comment Share on other sites More sharing options...
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