It appears that the upper gear
set in my SD50 Yanmar
Sail drive was not shimmed properly by Yanmar
. The drive has 650 hours on it and started making a terrible grinding sound and was quickly disabled and we returned to Georgetown
in the Bahamas
under one engine
it appears that the upper gears are not meshing correctly, engaging only at the ends and now slipping and grinding past each other. It appears that they are not shimmed enough to provide full contact between the gears.
Does anyone have experience with this problem? Can the gears be replaced without having to take the boat out of the water
? If so how is this done? Does it require dismounting and moving the engine
forward to gain access to the drive shaft to remove the worn gear
or is ther some other way to accomplish this task.
Any help or guidance will be appreciated.