393 with a Volvo
started to slip late last year. Cut a long story short replaced full gearbox
She has a shaft drive so mostly enclosed right down to the P bracket.
All rectified and no issues.
Up to 1500rpm no worries.
When we get out of the river and open up say to 1800rpm there is a distinct rattle.
Itís rhythmic to a point but when below decks itís hard to locate.
mounts are all good and we have had her out of the water
and can see nothing!
Best regards all