5
ENGINE SUB-ASSEMBLY 
 
 
 
 
 ITEM PART NO. DESCRIPTION 
  1      **  ENGINE, 22HP (Kohler No. CH22S PS-66536) 
   --       **  ENGINE, 23HP (Kohler No. CH23S PS-76536) 
   --       **  ENGINE, 25HP (Kohler No. CH25S PS-68577) 
  2  3-5638  J-CLIP, 3/8” Cushioned (2) 
  3  9-1523  SCREW, 5/16-18 x 5/8” Hex Washer Self Tap (2) 
  4  9-1299  NUT, 3/8-16 Nyloc (4) 
  5  9-1553  SCREW, 3/8-16 x 1-3/4” Hex Head Cap, Grade 5 (4) 
  6  2-2486  OIL DRAIN, Short 
  7  2-7972  ASSEMBLY, Oil Valve 
  8  9-1838  SCREW, M6 x 1 x 6mm Hex Flange Cap (Qty. 2 for 22 HP; 
      Qty. 4 for 25 HP) (Kohler part no. M-0650012) 
  9A  4-2708  BRACKET, Muffler, 22HP Kohler 
  9B  4-6486  BRACKET, Muffler, 25HP Kohler (Series 0) 
  10A      **  MUFFLER, 22HP Kohler (Kohler part no. A-24 068 00) 
  10B  4-6488  MUFFLER, 25HP Kohler (Kohler part no. A-24 068 17) 
  11  9-1839  SCREW, M5 x 8 x 16mm Hex Head Self Tapping (2) (Kohler # M-0545016) 
 12A 4-2707 GUARD, Muffler 
  12B  7-2155  GUARD, Muffler (used on ZMT2500KH & ZM2501KH models) 
  13  9-1840  SCREW, M5 x 8 x 10mm Hex Head Flange (2) (Kohler #M0550010) 
 14A 3-5675 SPACER, Clutch 
  14B  4-6410  SPACER, Clutch (Model MZM2200KH Only) 
 15 3-5520 CLUTCH, Electric 
   --  4-6409  CLUTCH, Electric (Model MZM2200KH Only) 
  16  9-1806  SCREW, 7/16-20 x 1-1/2” Hex Head Cap. Grade 5 
  17  9-1301  WASHER, 7/16” Split Lock (2) 
  18  9-1807  WASHER, 7/16 I.D. x 1-3/8 O.D. x 1/4 Flat 
   --  9-1962  WASHER,7/16” I.D.x 1-5/8” O.D. x 1/4 Flat 
  19  9-1304  SCREW, 3/8-16 x 1” Hex Head Cap, Grade 5 
  20  9-1808  SCREW, 7/16-14 x 1”, Grade 5 
  21A  3-5852  BRACKET, Anti-Rotation (5/16”) 
  21B  5-8207  BRACKET, Anti-Rotation (Model MZM2200KH Only) 
  22  4-6487  SHIELD, Heat, 25HP Kohler 
  23  7-2256  SPACER, Muffler Guard 
  24  9-2016  SCREW, 1/4-20 x 1-1/2” Hex Washer Self-Tap (2) 
  25  1-3250  KEY, 1/4 Square x 1” 
 26 4-6411 BRACKET, Torque 
 
 
 
 
NOTE: Items 2, 3 & 8 thru 13 are included with engine. 
 
 
 
 
MID MOUNT Z-RIDER   MANUAL No. 06110