MerCruiser Bravo III 3 Propshaft Seal

Quick overview on removing your leaky large propshaft seal on a Bravo III

[@anrescue]

Hi, what about the seal on the small shaft. Whats the procedure for that. If one is bad might as well do the other since your there and they are the same age rather than it leak a week later. Thanks

[@paulevans959]

i was also hoping to find that answer. i have a leak on the inner shaft seal and can't find any info on replacing that

[@TheZambie1]

Everyone will have their own opinion on the subject of replacing other seals that aren't currently leaking, and there is no one-size-fits-all answer. To say that the seals are the same age and will therefore be soon to fail is wrong. Also, where do you then draw the line? Reseal the entire drive? Every case is different, and so is the customer. In this case, the one seal that failed was replaced in short order, costing the customer X amount of dollars and the drive is still tight and probably will be for several seasons to come. So, to spend large amounts of additional money when it is not necessary is up to the individual, but in my opinion is foolish. If the inner shaft seal is leaking, well that's another video. And, as mentioned, more labor intensive, and I recommend obtaining the service manual.

[@franciswiz3781]

Will a bad carrier seal make noises ? When turning?

[@TheZambie1]

@@franciswiz3781 Seal - no. Bearing - yes.

[@user-bh5zo1kw5x]

@@franciswiz3781 If it's making noise when you turn, it's most likely your universal joint on your U-joint assembly.