Dont know the D2-55, but the MD series use a Mitsubishi starter. Nothing special, off the shelf automotive grade starter, sprayed green...like most Volvo parts
and motors. Volvo price
: $850. Auto parts
store: $85 or less.
I suggest pulling the starter and looking for manufacturer's marks. Added bonus to this approach is you get to do it once in a controlled situation (like at the dock). The MD series is a bitch to pull...you need a stupid long extension that will reach from the front of the engine
, underneath the heat eachanger, to the starter, to get to the upper starter bolt...practically inaccessible any other way...best to learn that somewhere besides mid ocean.