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Is it possible to replace the seals and O-rings on the 280 without having to separate the housings?
Thanks Rick. I somewhat figured it could be accomplished based on the cross cut view in my manual. I'm not sure where the water entered, so I going to replace the drain plug O-ring and the O-ring on the one bolt on the cover plate on the upper gear housing to be safe. I'm also changing out the seal on the bearing housing for the eccentric piston as well. I replaced those (except for the seal on the eccentric piston) when I changed out the upper gear housing last year.
If a leak is not via the prop shaft seals, the next suspect seal is the eccentric piston seal.
Keep in mind ...... although at first glance it is hard to tell by looking at it......, this seal is directional. The tiny exposed metallic area faces the inside of the unit.
Too, today I noticed something I never knew was on the lower housing. Below the drain screw on the lower housing, there's a hole, where water comes out when using the muffs to run the engine. I take it that it should be there.
Yes, it is a drain port for the lower unit seawater path cavity.
Always plug this port when using the garden hose and water muffs!
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Rick, I'm guessing the flat stock for the puller is about 5 or 6 " H, and about 4" or so wide. But what would the spanner nut be used for? I also notice the cone in the picture too.