Onan P216G, P218G, P220G, OL16, OL18, OL20, LX720, LX770, LX790 Engine Parts Catalog

The part numbers in this manual are OEM Onan numbers. Case and other manufacturers assigned their own unique numbers. John Deere simply added the prefix “HE” to the Onan number.

Printed in U.S.A. Engine Parts Catalog 965-0268B 10-98 (Spec A-H) Replaces 4-98 (Spec A-H) LX720 LX770 LX790 OL16 OL18 OL20 P216G P218G P220G

The following symbols are used in Onan manuals to alert users to the potentially dangerous condi- tions relating to maintenance of equipment and re- placement of parts. Please read and observe. This symbol warns of immedi- ate hazards which will result in severe personal injury or death. This symbol refers to a hazard or unsafe practice which can result in severe personal injury or death. This symbol refers to a hazard or unsafe practice which can result in severe personal injury or product or property damage. To avoid errors or delay in filling your parts order, always give the MODEL, SPEC NO. and SERIAL NO. from the Onan nameplate. For handy reference, insert your nameplate in- formation in the spaces below. MODEL AND SPEC NO. SERIAL NO. DIGITAL CONTROL SOFTWARE VERSION AND DATE (IF APPLICABLE) Contact with USED ENGINE OILS has been identified by a United States federal agency and some USA state agencies as causing CANCER or REPRODUCTIVE TOXICITY. When checking or changing engine oils take all necessary precautions not to ingest, breathe the fumes or contact the used oil. Contact with ASBESTOS has been identified by a United States federal agency and some USA state agencies as causing CANCER or REPRODUCTIVE TOXICITY. When handling engine gaskets take all necessary precautions not to ingest, breathe or contact the dust from the gaskets! Use adequate ven- tilation and wear protective gloves, masks and clothing! Contact with BENZINE and LEAD, found in gasoline, fuel additives and solvents has been identified by a United States federal agency and some USA state agencies as causing CANCER or REPRODUC- TIVE TOXICITY. When checking, draining or adding gasoline and fuel additives or using solvents take all necessary precautions not to ingest, breathe the fumes or contact the liquids. Use adequate ventila- tion and wear protective gloves, masks and protective clothing! PSP-1 Service and repair of Onan equipment must be performed by trained, experienced personnel only. Im- proper service or repair may result in property damage, severe personal injury or death. Do not use this catalog as a guide to servicing your equipment. Read and follow the IMPORTANT SAFETY INSTRUC- TIONS in the Service Manual appropriate for the equipment you are working on.

1 Introduction This parts manual applies to the standard Performer horizontal engine as listed in the Engine Data Table. Parts are arranged in groups of related items and each illustrated part is identified by a reference number corresponding to the same reference number in the parts list. Parts illustrations are typical. Throughout this manual, left and right sides are determined by facing the oil cooler (front) end of the engine. Using the MODEL and SPECIFICATION NUMBER from the nameplate, consult the SALES OPTION CODE TABLE in the back of the book to identify factory installed parts that are unique to your engine (Note: The diagonal line (/) in the model and specification number separates engine characteristics from the specification number/letter. The specification number denotes customer requested features. The specification letter advances [A to B, B to C, etc] with major manufacturing changes.) Engine Data Table MODEL RATING P216G–I/* 16 Horse Power P218G–I/* 18 Horse Power P220G–I/* 20Horse Power OL16/* 16 Horse Power OL18/* 18 Horse Power OL20/* 20 Horse Power LX720/* 16 Horse Power LX770/* 18 Horse Power LX790/* 20 Horse Power

Index 2 Adapter, Air Intake – Carburetor, 39 Adapter, Arm – Governor, 43 Adapter, Cleaner – Remote Air, 39 Adapter, Clutch, 40 Adapter, Clutch – Electric, 40 Adapter, Exhaust, 53 Adapter, Filter – Oil, 47, 48 Adapter, Gas – LP, 29 Adapter, Governor Arm, 54 Adapter, Plate – Bearing, 7 Adapter, Pump – Hydraulic, 9 Alternator, 15 Arm Assy, Control – Governor, 43 Arm, Governor, 15 Baffle, Base – Oil, 51 Baffle, Tube – Breather, 9 Baffle, Valve – Breather, 7 Ball, Bearing – Governor Shaft, 15 Band, Cleaner – Air, 38 Base, Filter – Remote Oil, 48 Base, Oil, 51 Bearing, Camshaft, 7 Bearing, Crankshaft – Front, 7 Bearing, Crankshaft – Rear, 7 Bearing, Shaft – Governor, 15 Block, Cylinder, 7, 9 Bracket Assy, Choke, 35 Bracket, Adjust – Governor, 45 Bracket, Cable, 43 Bracket, Cable – Choke, 33, 34 Bracket, Choke, 35 Bracket, Control – Governor, 43 Bracket, Converter – LP, 31 Bracket, Filter – Remote Oil, 48 Bracket, Governor, 17 Bracket, Lifting, 45 Bracket, Line – Fuel, 17, 39 Bracket, Mounting – Regulator, 30 Bracket, Solenoid – Remote Choke, 35 Bracket, Solenoid – Two Speed Governor, 17 Bracket, Support – Muffler, 53 Bracket, Tube – Oil Fill, 46 Bushing, Arm – Control, 43 Bushing, Control – Governor, 17, 43 Bushing, Reducer – Natural Gas, 30 Cable, Governor, 17 Cable, Plug – Spark, 16 Camshaft, 10 Cap Assy, End – Starter, 21 Cap, Breather, 9 Cap, Fill – Oil, 46 Cap, Fitting – Fuel, 23 Cap, Limiter – Idle, 28 Cap, Port – Vacuum, 15 Cap, Solenoid – Starter, 19 Cap, Valve, 7 Capacitor, 37, 39 Carburetor Components, Gasoline, 26, 27 Carburetor Components, Gasoline – Auto Choke, 28 Carburetor, Components – LP Gas, 29 Carburetor, Gasoline, 25 Carburetor, LP, 32 Choke, Manual, 54 Choke, Remote, 35 Cleaner, Air, 37, 38 Cleaner, Air – Remote, 38 Clip, Cable – Choke, 33, 34 Clip, End – Rod, 25, 32, 45 Clip, Lock – Remote Choke, 35 Clip, Retaining – Control, 15 Clip, Retaining – Control Rod, 25, 32, 45 Clip, Wire, 16 Clip, Wire – Blower Housing, 45 Clip, Wire – Fuel Line, 25 Clutch Assy, Starter, 20 Codes, Sales (Definitions), 75 Coil, Ignition – Battery, 16 Components, Carburetor, 26 Components, Carburetor – Gasoline, 27 Components, Carburetor – Gasoline Auto Choke, 28 Components, Starter, 19, 20, 21 Connector, Line – Oil, 47 Connector, Male, 48 Connector, Male – Inverted, 29 Control, Choke – Front Pull, 34 Control, Choke – Rear Pull, 33 Control, Ignition, 15 Cover Assy, Starter, 21 Cover, Cleaner – Air, 37 Cover, Element – Air Cleaner, 37 Cover, Pad – Oil Filter, 47 Cover, Regulator – Voltage, 43 Cover, Tube – Exhaust, 53 Cover, Valve, 7 Crankshaft, 11 Cup, Governor, 10 Cup, Intake – Oil Pump, 51 Decal, Control Panel, 54 Deflector, Carburetor, 29 Drain, Filter – Oil, 47 Elbow, Adapter – LP, 29 Elbow, Brass – LP Carburetor Kit, 32 Elbow, Brass – LP Converter Kit, 31 Elbow, Brass – Natural Gas Regulator, 30 Elbow, Gas – LP, 29 Elbow, Inlet – Air, 38, 39 Elbow, Main Jet – LP Regulator, 29 Elbow, Male – Oil Hose, 48 Elbow, Street, 30 Elbow, Street – LOPKO, 48, 49 Elbow, Street – Oil Line, 47 Elbow, Street – Pressure Sender, 50

Index 3 Element, Cleaner – Air, 37 Exhaust System, 53 Filter, Fuel, 23 Filter, Oil, 47, 48 Filter, Oil – Remote, 48 Filter, Tube – Breather, 37, 39 Fitting, Barbed, 25 Flywheel, 13 Fuel System – Gasoline, 25 Fuel System – LP Gas, 29 Fuse, 30A Blade, 57, 58, 59 Fuse, 30A Cartridge, 58 Gasket, Adapter – Oil Filter, 47, 48 Gasket, Base – Oil, 51 Gasket, Carburetor – Gasoline, 25 Gasket, Carburetor – LP, 32 Gasket, Cleaner – Air, 29, 37 Gasket, Cover – Valve, 7 Gasket, Exhaust, 53 Gasket, Filter – Oil, 47 Gasket, Fitting – Hose, 37 Gasket, Head – Cylinder, 7 Gasket, Horn – Air, 29 Gasket, Manifold – Exhaust, 53 Gasket, Manifold – Gasoline Intake, 25 Gasket, Manifold – LP Intake, 32 Gasket, Mounting – Gearcase, 15 Gasket, Plate – Bearing, 7 Gasket, Plate – Ignition, 9 Gasket, Plug – Hex Head, 51 Gear, Camshaft, 10 Gear, Crankshaft, 11 Gear, Drive, 21 Gear, Ring, 13 Gearcase, 15 Governor, 43, 45 Governor, Speed – Two, 17 Grommet, Bracket – Fuel Line, 17 Grommet, Cleaner – Air, 32 Grommet, Cleaner – Remote Air, 39 Grommet, Seal – Air, 45, 48 Grommet, Support – Air Cleaner, 37 Grommet, Tube – Breather, 37 Guard, Stationary, 45 Guide, Valve, 7 Harness, Control, 54 Harness, Engine (Code 35AZ), 60 Harness, Engine (Code 35BB, 35BD, 35BH, 35CG), 55 Harness, Engine (Code 35BC, 35BZ, 35CC, 35CH, 35CJ, 35DB), 56, 58 Harness, Engine (Code 35BE), 57 Harness, Engine (Code 35BJ), 60 Harness, Engine (Code 35BK), 59 Harness, Interface (Code 35AW), 61 Harness, Interface (Code 47AW), 61 Harness, Wiring – LOPKO, 49 Head, Cylinder, 7 Holder, Brush, 20 Holder, Cartridge Fuse, 58 Hose, Breather, 25, 32, 39 Hose, Fuel, 23, 25, 29, 32 Hose, Inlet – Air, 32 Hose, Oil, 48 Housing, Blower, 43, 45 Housing, Cleaner – Air, 37 Housing, Cylinder – Air, 43 Hub, Cup – Governor, 10 Hub, Plate – Drive, 40 Ignition, Electric, 16 Indicator, Fill – Oil, 46 Insert, Seat – Valve, 7 Insulator, Module – Ignition, 15 Jet, Idle, 27, 28 Jet, Power, 26, 27, 28 Joint, Ball, 45 Key, Crankshaft, 11 Key, Flywheel, 13 Key, Gear – Crankshaft, 11 Key, Machine – PTO Shaft, 13 Key, Woodruff – Camshaft Gear, 10 Kit, Bracket – Mounting, 19 Kit, Brush – Starter, 19, 20 Kit, Bushing – Starter, 19, 20 Kit, Carburetor, 25 Kit, Carburetor – LP, 32 Kit, Cleaner – Air, 37 Kit, Clutch – Starter, 19 Kit, Converter – LP, 31 Kit, Float, 27, 28 Kit, Gasket, 28 Kit, Gasket – Oil Pump, 7 Kit, Hardware – Starter, 19, 20 Kit, Intake Manifold, 25 Kit, Lever – Choke, 27 Kit, Lever – Starter Shift, 19, 20 Kit, Repair – Gasoline Carburetor, 27 Kit, Repair – Starter, 21 Kit, Ring – Piston, 9 Kit, Screw and Plug, 28 Kit, Seal – Dust, 19 Kit, Shaft – Choke, 27 Kit, Shaft – Throttle, 27, 28 Kit, Solenoid – Starter, 19, 20 Kits, Gasket, 7, 62 Knob, Cleaner – Air, 37 Labels, 62 Lever, Choke, 34, 35 Lever, Control, 54 Lever, Governor, 45

Index 4 Line, Oil – Flex, 47 Line, Pulse, 23 Link, Choke, 34, 35 Link, Control – Governor, 43 Lock, Spring – Valve, 7 Manifold, Exhaust, 53 Manifold, Intake, 25, 32 Muffler, 53 Needle, Carburetor, 28 O–Ring, Carburetor – Gasoline, 25 O–Ring, Carburetor – LP, 29 O–Ring, Valve – Shutoff, 29 Paint, 62 Panel, Control, 54 Pin, Alignment – Gear Cover, 7 Pin, Center – Camshaft, 10 Pin, Cotter – Choke Lever, 34 Pin, Cotter – Governor, 43, 45 Pin, Cotter – Two Speed Governor, 17 Pin, Dowel – Governor Cup Stop, 15 Pin, Drive – Bearing Stop, 7 Pin, Piston, 9 Piston, 9 Plate, Bearing – Rear, 7 Plate, Cap – Starter, 21 Plate, Cover – Ignition Plunger, 9 Plate, Deflector – Air, 37 Plate, Support – Air Cleaner, 37 Plug, Black Nylon – Stationary Guard, 45 Plug, Cap, 34 Plug, Countersunk – Oil Pad Cover, 47 Plug, Dot Button – Blower Housing, 39 Plug, Hex Head – Oil Base, 51 Plug, Hole – Breather, 9 Plug, Hole – Core, 7 Plug, Spark, 16 Plug, Square Head – Adapter, 47 Plug, Square Head – Oil Base, 51 Plug, Welch – Camshaft, 7 Plunger, Valve – Bypass, 7, 48 Pre–Cleaner, Air, 38 Pulley, 41 Pulley, Drive – Alternator, 41 Pump, Fuel, 23 Pump, Fuel – Vacuum, 23 Pump, Oil, 7 Rectifier, Control Harness Silicon, 54 Rectifier, Engine Harness, 56 Rectifier, Silicon, 58 Reed, Valve – Breather, 7 Regulator, 15 Regulator, Converter – LP, 31 Regulator, Gas – LP, 29 Regulator, Gas – Natural, 30 Regulator, Voltage, 15 Retainer, Bolt – Starter, 21 Ring, Retaining – Camshaft, 10 Ring, Retaining – Crankshaft, 11 Ring, Retaining – Piston Pin, 9 Rod, Choke, 35 Rod, Connecting, 9 Rod, Control, 45 Rod, Control – Governor, 25, 32 Rod, Governor, 45 Rotor, Ignition, 16 Sales Code Definitions, 75 Sales Option Code Table, 74 Screen, Inlet – Air, 13 Screen, Tube – Breather, 9 Seal, Dust, 20, 21 Seal, O–Ring – Air Cleaner, 39 Seal, O–Ring – Breather Cap, 9 Seal, Oil – Crankshaft, 15 Seal, Oil – Crankshaft Rear, 7 Seal, Oil – Governor Shaft, 15 Seal, Tube – Oil Fill, 46 Seal, Valve – Intake, 7 Sealant, Thread, 62 Sender, Gauge – Oil Pressure, 50 Sender, Pressure – Oil, 50 Shaft, Governor, 15 Shaft, PTO, 13 Shim, End Play – Crankshaft, 7 Sleeve, Bearing, 11 Solenoid, 35 Solenoid, Cutoff – Fuel, 27 Solenoid, Governor – Two Speed, 17 Spacer, Cleaner – Air, 32 Spacer, LP Gas, 37 Spacer, Nylon – Air Cleaner, 37 Spacer, Stud – Air Cleaner, 37 Spring, Governor, 17, 43 Spring, Governor Return, 54 Spring, Needle – Power, 28 Spring, Rod – Governor, 25, 32 Spring, Setting – Idle, 43 Spring, Valve, 7 Spring, Valve – Breather, 7 Spring, Valve – Bypass, 7 Starter, 18 Starter, Inertia, 18 Starter, Shift – Solenoid, 18 Stator, 15 Strap, Mounting – Regulator, 30 Stud, Adjusting, 45 Stud, Cover – Gear, 15 Stud, Mounting, 7 Support, Cleaner – Air, 37 Support, Cover – Exhaust, 53 Support, Muffler, 53 Switch – LOPKO, 49

Index 5 Switch, Ignition, 54 Switch, LOPKO, 48, 49 Switch, Temperature – High, 41 Switch, Temperature – Oil, 51 Swivel, Lever – Choke, 17, 34, 45 Swivel, Lever – Throttle, 43 Swivel, Link, 35 Tappet, Valve – Standard, 7 Tube, Breather – Air Cleaner, 37 Tube, Breather – Crankcase, 37, 39 Tube, Breather – Cylinder Block, 9 Tube, Breather – LP Carburetor, 32 Tube, Exhaust, 53 Tube, Exhaust – Offset, 53 Tube, Fill – Oil, 46 Tube, Induction – Air, 38, 39 Tube, Intake – Air, 29, 37 Tube, Oil – Cylinder Block, 7 Tube, Port – Vacuum, 15 Valve, Breather, 9 Valve, Exhaust, 7 Valve, Intake, 7 Valve, Magnetic, 30 Valve, Shutoff – Fuel, 29 Valve, Shutoff – LP Converter, 31 Valve, Shutoff – Oil Base, 51 Vaporizer, Gas – LP, 29 Weight, Balance, 11 Wheel, Blower, 13 Wheel, Screen – Blower, 13 Wrapper, Element – Air Cleaner, 37 Yoke, Shaft – Governor, 15

P216/18/20G 6 Cylinder Block 34A 40 41 69 70 71 72 73 74

P216/18/20G 7 Cylinder Block REF PART QTY PART REF PART QTY PART NO. NO. USED DESCRIPTION NO. NO. USED DESCRIPTION 1 1 Block, Cylinder (See Short Block Catalog #932–0109) 2 517–0048–01 1 Plug, Camshaft Welch Opening (1–5/8”) 3 800–0051 5 Screw, Hex Head Cap (3/8–16 x 1–1/4”) 4 Shim, Crankshaft End Play (Use as Required) 104–0776 1 .005” 104–0776–01 1 .003” 5 Bearing, Rear Crankshaft (Includes Thrust Washer) 101–0804 1 Standard 101–0804–02 1 .002” Undersize 101–0804–10 1 .010” Undersize 101–0804–20 1 .020” Undersize 101–0804–30 1 .030” Undersize 6 104–0575 1 Washer, Thrust 7 101–0809 1 Gasket, Bearing Plate 8 Plate, Rear Bearing 101–0439–01 1 Cadmium Plated Code 11AH,11AV 101–0551–01 1 4 Boss – Code 11AK 101–0437–01 1 SAE–A – Zinc Plated – Code 11AP 9 101–0405 2 Bearing, Camshaft 10 509–0041 1 Seal, Crankshaft Rear Oil 11 516–0072 4 Pin, Bearing Stop Drive 12 120–1320 1 Tube, Oil 13 Insert, Exhaust Valve Seat 110–1824 2 Standard 110–1824–02 2 .002” Oversize 110–1824–05 2 .005” Oversize 110–1824–10 2 .010” Oversize 110–1824–25 2 .025” Oversize 14 Insert, Intake Valve Seat 110–0197 2 Standard 110–0197–02 2 .002” Oversize 110–0197–05 2 .005” Oversize 110–0197–10 2 .010” Oversize 110–0197–25 2 .025” Oversize 15 Guide, Valve 110–3527 2 Exhaust 110–3526 2 Intake 16 Bearing, Front Crankshaft (Flanged) 101–0805 1 Standard 101–0805–02 1 .002” Undersize 101–0805–10 1 .010” Undersize 101–0805–20 1 .020” Undersize 101–0805–30 1 .030” Undersize 17 101–0761 1 Adapter, Bearing Plate Code 11BH 18 Screw 815–0682 4 Socket Head (Special) Code 11BH 800–0515 5 Cap, Hex Head (Special) Code 11BF 800–0515 4 Cap, Hex Head (Special) Code 11BE, 11AR 19 526–0402 5 Washer, Flat (.395 Screw) 20 516–0141 2 Pin, Gear Cover Alignment 21 123–1175 1 Reed, Breather Valve Specs A, B 22 123–1173 1 Baffle, Breather Valve Specs A, B 23 123–1174 1 Spring, Breather Valve Specs A, B 24 110–1879–01 1 Cover, RH Valve – Spec A,B 25 110–3637–01 1 Cover, LH Valve – Begin Spec C – Zinc–Plated 26 Gasket, Valve Cover 110–3709 3 Spec A, B 110–3709 2 Begin Spec C 27 115–0006 4 Tappet, Standard Valve 28 110–3479 2 Valve, Intake 29 110–3480 2 Valve, Exhaust 30 800–0010 2 Screw, Hex Head Cap (1/4–20 x 1–3/4”) 31 110–3485 4 Spring, Valve 32 110–3511 8 Lock, Valve Spring 33 509–0289 2 Seal, Intake Valve 34 803–0071 2 Screw, Set Socket (3/8–16 x 5/8”) (Use W/O Remote Oil Filter) 34A 520–0820 2 Stud, Mounting (3/8–16 x 1–11/16) (Use with Remote Oil Filter) 35 505–0057 1 Plug, Pipe – Code 17CE 36 110–3181 2 Gasket, Cylinder Head 37 Head, Cylinder 110–3509 1 Right Side 110–3508 1 Left Side 38 110–3487 4 Washer, Valve Spring Retaining 39 526–0018 1 Washer, Flat (1/4” Screw) 40 526–0122 18 Washer, Flat (5/16” Screw) 41 800–0571 18 Screw, Hex Head Cap (Special) 2.0” Long 42 526–0063 2 Washer, Copper Flat (1/4” Screw) 43 517–0067 1 Plug, Core Hole (Specs A, B) 44 110–3510 4 Cap, Valve 45 Kit, Gasket 168–0187 1 Engine, Complete 168–0189 1 Valve Grind/Carbon Removal 46 120–0491 1 Pump, Oil (Components Not Sold Separately) 47 120–0161 1 Gasket Kit, Oil Pump 48 740–1004 2 Washer, Flat (M6) 49 800–0007 2 Screw, Hex Head Cap (1/4–20x1”) 50 801–0049 1 Screw, Hex Head Cap (3/8–24 x 7/8”) 51 526–0066 1 Washer, Copper Flat (3/8” Screw) 52 120–0140 1 Spring, Bypass Valve 53 120–0398 1 Plunger, Bypass Valve

P-Series	OL-Series	LX-Series
P216G (16 HP)	OL16 (16 HP)	LX720 (16 HP)
P218G (18 HP)	OL18 (18 HP)	LX770 (18 HP)
P220G (20 HP)	OL20 (20 HP)	LX790 (20 HP)

Onan P216G, P218G, P220G, OL16, OL18, OL20, LX720, LX770, LX790 Engine Parts Catalog

Onan P216G, P218G, P220G, OL16, OL18, OL20, LX720, LX770, LX790 Engine Parts Catalog

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Gasket Sets and Seal Kits

Specialized Systems and Optional Equipment

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