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HOW TO USE THIS MANUAL Robin engines are identifi ed by MODEL, SPECIFICATION, and CODE NUMBER. For each model there may be many different versions called specifi cations. Each specifi cation will be unique in some way. The difference may only be the paint color or it may have a different type of PTO or some other signifi...
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MANUAL LAYOUT 1. SECTION NAME Parts are broadly classifi ed according to their functions. Refer to the Group Index (table of contents) for respective section name. 2. FIG. No. The FIG. number indexes the reference and part numbers to the illustration. Figure numbers that vary only in the tens place (i.e..: 700 and 710) are in a group of the same section 3.
Group Name CRANKCASE GROUP ... 6 CRANKSHAFT GROUP ... 8 INTAKE and EXHAUST GROUP ... 10 GOVERNOR GROUP ... 14 COOLING and STARTING GROUP ... 16 FUEL, LUBRICANT GROUP ... 18 CARBURETOR GROUP ... 20 ELECTRIC DEVICE GROUP ... 22 ACCESSORY GROUP ...
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SECTION 2 CRANKSHAFT GROUP Ref. Part Number Description 20B-20901-01 Crankshaft Cp 20B-21201-01 Crankshaft Cp 20B-21001-01 Crankshaft Cp 005-32054-01 Woodruff Key 20B-22501-00 Connecting Rod Ay 001-05084-00 Connecting Rod Bolt 263-23301-33 Piston Pin 20B-23401-H3 Piston 20B-23403-H3 Piston 20B-23404-H3 Piston 20B-23501-07 Piston Ring Set 20B-23502-07 Piston Ring Set 20B-23503-07...
SECTION 3 INTAKE and EXHAUST GROUP FIG. 300 EX40 37 35 34 38 - 10 - 08-08...
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SECTION 3 INTAKE and EXHAUST GROUP Ref. Part Number Description 20B-31601-01 Camshaft Cp 20B-35101-03 Pin, camshaft 024-00700-20 O ring 005-19041-00 Pin, spring 277-36401-03 Release lever 20B-36501-03 Clip 277-38702-03 Return Spring 246-33611-03 Valve Spring 246-33711-13 Spring Retainer 20B-33401-H3 Intake Valve 20B-33501-H3 Exhaust Valve 246-35501-03 Collet Valve...
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SECTION 3 INTAKE and EXHAUST GROUP FIG. 310 EX40 - 12 - 08-08...
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SECTION 3 INTAKE and EXHAUST GROUP Ref. Part Number Description 20B-32611-H0 Air Cleaner Ay -200 20B-32630-H8 Cleaner Body -220 20B-32720-H8 Gasket, packing -250 20B-32640-H8 Cover -260 20B-32850-H8 -270 20B-32650-H8 Bolt X85-11001-80 Rubber Pipe, breather 002-38060-00 Flange Nut 001-04061-60 Flange Bolt 20B-32610-H7 Element EX40...
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SECTION 4 GOVERNOR GROUP Ref. Part Number Description 20B-42301-03 Governor Lever 20B-42201-13 Governor Shaft 20B-42701-01 Governor Rod 20B-42801-13 Rod Spring 003-13060-00 Clip 001-14062-50 Bolt and Washer 018-60600-20 20B-42501-13 Governor Spring 003-11080-00 Washer 20B-43301-01 Speed Control Lever Cp 20B-43351-03 Speed Control Lever 011-60400-30 Bolt, swivel 227-43501-13...
SECTION 5 COOLING and STARTING GROUP FIG. 520 EX40 - 18 - 08-08...
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SECTION 5 COOLING and STARTING GROUP Ref. Part Number Description 20B-50301-00 Recoil Starter Ay 20B-50145-08 Starter Pulley 261-50100-08 Starter Knob 20B-50110-08 Starter Rope 20B-50101-08 Set Screw 161-50150-08 Ratchet Guide 227-50135-08 Return Spring 227-50131-08 Friction Spring 277-50155-08 Spiral Spring 161-50125-08 Ratchet 20B-50120-08 Reel 20B-50150-08...
SECTION 7 ELECTRIC DEVICE GROUP Ref. Part Number Description 20B-79230-H1 Flywheel Cp 20B-79241-H1 Flywheel Cp 20B-79430-H1 Ignition Coil 20B-79301-H1 Charge Coil 20B-54101-H3 Cooling Blower 018-01800-10 Flange Nut 20B-71002-03 Ring Gear 001-14062-50 Bolt and Washer Ay 004-35062-00 Screw and Washer Ay 20B-73101-01 Wire 1 065-01401-50...
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SECTION 7 ELECTRIC DEVICE GROUP - ELECTRIC STARTER FIG. 710 EX40 - 26 - 08-08...
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SECTION 7 ELECTRIC DEVICE GROUP - ELECTRIC STARTER Ref. Part Number Description 279-70502-00 Starting Motor Ay 209-70550-08 Yoke Cp 209-70551-08 Brush 209-70545-08 Brush Spring 209-70530-08 Brush Holder 209-70552-08 Insulator 209-70554-08 Armature Ay 209-70521-08 Over Running Clutch Cp 279-70550-08 Housing Cp 209-70511-08 Bush 209-70505-18...
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SECTION 7 ELECTRIC DEVICE GROUP - CONTROL BOX FIG. 720 EX40 - 28 - 08-08...
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SECTION 7 ELECTRIC DEVICE GROUP - CONTROL BOX Ref. Part Number Description 277-73105-01 Wire 5 214-79007-01 Bolt, starter 003-10080-00 Washer 073-20044-80 Label, battery 20B-75101-01 Control Box Cp 073-20044-70 Label, starter switch 066-00003-30 Switch Ay 277-71401-01 Diode Rectifi er Cp 044-35061-00 Screw and Washer Ay 277-73103-11 Wire 3 Cp...