Ref.

  P/N
  CONNECTING COMPONENTS REVERSE GEAR VOLVO PENTA 1.91:1 RATIO BB115A, BB115B, BB115C, MB20A, MB20B, MB20C
DESCRIPTION
1      Reverse gear
-      ...Components, see group 4B
2      Carrier (1), standard
3   959239-5   ...Screw
4   955783-6   ...Nut
5   941908-6   ...Washer
6   907599-5   ...Pin
7      Flywheel casing
8      Gasket
9   940160-5   Screw, Length 38MM
-   970972-6   Screw, Length 40MM
10   955550-9   Screw, Length 51MM
--   955344-7   Screw, Length 50MM
11   940184-5   Screw, Length 95MM
--   970982-5   Screw, N.S.S., Length 100MM
12   941909-4   Washer, internal diameter = 11.5MM
--   940280-1   Washer, internal diameter = 13.5MM
13   955525-1   Screw, Length 25MM
14   940186-0   Screw, Length 38 MM
15   941907-8   Washer
16   853893-6   Gasket
17   955535-0   Screw, Length 32MM
18   955540-0   Screw, Length 70MM
19   942336-9   Washer
20      Operating handle
21      Handle
22   804426-5   Hose connection, up to 59517
--   827937-4   Hose connection, from 59518
23   828693-2   Hose connection, see group 2B
24      Propeller shaft flange (2) MB20B
--   827927-5   Carrier, see group 9
25   819153-8   Rubber coupling, see group 9
26      Cooling water intake, see group 9