MODEL Z-FORCE
| REF. | PART |   | 
| NO. | NO. | DESCRIPTION | 
1BS-691021 Choke Control Bracket
2BS-94930 Screw (Choke Control Bracket)
| 3 | BS-691022 | Choke Link | 
| 4 | BS-690960 | Screw (Breather Assembly) | 
| 5 | BS-690942 | Breather Tube | 
6BS-499601 Breather Assembly
7BS-690937 Breather Gasket
8BS-690960 Screw (Control Bracket)
| 9 | BS-691023 | Control Bracket | 
| 10 | BS-690231 | Cylinder Assembly | 
11BS-499585 Bushing/Seal Kit (Magneto Side)
12BS-391086 Oil Seal (Magneto Side)
14BS-499788 Air Cleaner Cover
15BS-691008 Air Cleaner Knob
16BS-499486S Air Cleaner Cartridge Filter
17BS-273638S Pre-Cleaner Filter
18BS-691005 Screw (Blower Housing)
19BS-691004 Blower Housing
20BS-491657 Oil Pressure Switch
22BS-499588 Piston Assembly (Standard) BS-499589 Piston Assy. (.010 Oversize) BS-499590 Piston Assy. (.020 Oversize) BS-499591 Piston Assy. (.030 Oversize)
23BS-499604 Ring Set (Standard) BS-499605 Ring Set (.010 Oversize) BS-499606 Ring Set (.020 Oversize)
|   | BS-499607 | Ring Set (.030 Oversize) | 
| 24 | BS-263181 | Piston Pin Lock | 
| 25 | BS-499583 | Connecting Rod | 
| 26 | BS-690976 | Screw (Connecting Rod) | 
| 27 | BS-690103 | Label Kit | 
| 28 | BS-690229 | Piston Pin | 
| 29 | BS-691046 | Crankshaft | 
| 30 | BS-94388 | Timing Key | 
| 31 | BS-690980 | Timing Gear | 
| 32 | BS-690981 | Rod-Push (Steel) | 
| 33 | BS-690982 | Rod-Push (Aluminum) | 
| 34 | BS-262679 | Valve Tappet | 
| 35 | BS-691010 | Clip | 
| 36 | BS-691012 | Air Guide Cover (Cylinder #1) | 
|   | B & S 407777-0128-E1 | 
| REF. | PART |   | 
| NO. | NO. | DESCRIPTION | 
37BS-94930 Screw (Air Guide Cover)
38BS-690960 Screw (Air Guide Cover)
39BS-690978 Camshaft
41BS-691001 Air Cleaner Gasket
42BS-690952 Carburetor Spacer
| 43 | BS-690950 | Intake Gasket | 
| 44 | BS-691014 | Air Guide Cover (Cylinder #2) | 
| 45 | BS-690949 | Intake Gasket | 
| 46 | BS-693996 | Intake Manifold | 
| 47 | BS-94913 | Screw (Intake Manifold) | 
| 48 | BS-492932 | Oil Filter | 
| 49 | BS-94010 | Nut (Carburetor) | 
| 50 | BS-690951 | Stud (Carburetor) | 
| 51 | BS-690069 | Engine Sump | 
| 52 | BS-690770 | Oil Pump Screen | 
| 53 | BS-690954 | Oil Filter Nipple | 
| 54 | BS-690945 | Crankcase Gasket | 
| 55 | BS-94239 | Oil Drain Plug | 
56BS-690947 Oil Seal (PTO Side)
57BS-690552 Governor Crank Bushing
58BS-690657 Governor Shaft Seal
| 59 | BS-690283 | Oil Plug | 
| 60 | BS-499054 | Oil Pump | 
| 61 | BS-690956 | Oil Collector | 
| 62 | BS-690957 | Breather Retainer | 
| 63 | BS-691042 | Pump Shaft | 
64BS-499613 Oil Pump Cover
65BS-690589 O-Ring Seal (Oil Pump Cover)
66BS-691033 Screw (Oil Pump Cover)
67BS-690412 Washer (Governor Gear)
| 68 | BS-394348 | Governor Gear | 
| 69 | BS-690317 | Governor Shaft Retainer | 
| 71 | BS-695104 | Emissions Label | 
72BS-690308 Screw (Engine Sump)
73BS-691015 Air Guide Cover
74BS-499890 Valve Overhaul Kit
75BS-690962 Cylinder Head Gasket
| 76 | BS-690968 | Valve Seal | 
| 77 | BS-690970 | Exhaust Gasket | 
| 78 | BS-690971 | Rocker Cover Gasket | 
| - | BS-692714 | Short Block |