Some comments from someone mid way into this project.
I bet the gimball service is a greasing. A simple job if you can get to the zerk fitting. Mine is on the starboard side in the housing, but the way my hull is recessed, you cannot get at the zerk fitting. The factory should have put a 90 degree fitting. I will fix this, but I believe it is because of the impossible means to get to, the previous owner did not grease it.

Ask If they will pull the stern drive on the gimball service. If yes, why not replace the gimball while there ($36 from Volvo) and replace the bellows $? ( forgot price but cheap)(rubber tubes accordian like). Replacing the bellows is simple and will be new and not old and dry as the gimball and u joints can rust as per other guys recommendations if water gets in the bellows. U Joints from Volvo are $390 for the two and the miscellaneous parts.
Impeller is $40 for the kit and easy to get to on our engines. I have the engine cover so it is easy to remove for comfortable access.
How about the belts? They ok?
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2010 Sea Hunt Triton 220 "Big Whiskey"2003 FW Freedom 180 Volvo Penta 4.3GL/SX-M "It'll Do Four Now" (Sold)
2012 Avalanche LTZ 4X4 