Ref.

  P/N
  LOWER GEAR UNIT S-DRIVE UNIT 110S MD21A/110S
DESCRIPTION
1   851485-3   Lower gear unit
2   851486-1   ...Lower gear unit
3   851473-9   ......Housing
4   850071-2   ...Counter shaft
5   914459-3   ...Lock ring
6   26413-5   ...Spacer, thickness = 0.1MM
-   26411-9   ...Spacer, thickness = 1.0MM
7   18559-5   ...Ball bearing
8   804303-6   ...Shim, thickness = 0.05MM
-   34615-5   ...Spacer, thickness = 0.10MM
9   806620-1   ...Roller bearing
10   181288-2   ...Needle bearing
11   851286-5   ...Set of gears
12   948883-4   ...Washer
13   946363-9   ...Lock nut
14   897426-3   ...Seal ring
15      ...Propeller shaft
16   181287-4   ...Ball bearing
17   906635-8   ...Round nut
18   87655-7   ...Shim, thickness = 0.10MM
--   191840-8   ...Shim, thickness = 0.15MM
19   907025-1   ...Washer
20   897341-4   ...Washer
21   183390-4   ...Needle bearing
22   925257-8   ...0-ring
23   963706-7   ...Screw
24   832965-8   ...Ring
25   804262-4   ...Plug
26   804261-6   ...Gasket
27   872128-4   ...Spline sleeve
28   963711-7   ...Bolt
29   942551-3   ...Washer
30   850265-0   ...Sealing strip
31   960238-4   ...O-ring
32   875812-0   ...Zinc ring kit
33      ......Zinc ring (850073)
34   851287-3   ......O-ring
35   963695-2   ......Screw
36   953031-2   ...Screw
37   955781-0   ...Nut
38   850396-3   Cone, see group 4A
38a   850888-9   ...Washer
39   851773-2   ...Screw (949325), see group 4A
40   949807-2   Cotter pin (47)
41   852044-7   Cast nut (47)