GENERAC PARTS MANUAL YANMAR 45CC DIESEL ENGINE (G40) 0075 NOTICE! The information in this manual is known to be accurate as of the date of release shown on the cover. However, engineering changes can occur without notice. To obtain the proper parts, please be sure to use the serial number of the unit being serviced when ordering from this manual. Always to refer to any parts notes and changes before ordering. All other parts not shown in this manual can be found on Generac s exploded view drawings on line on GENservice at www.generac.com. www.generac.com or -888-GENERAC (-888-46-7)
TABLE OF CONTENTS CYLINDER BLOCK...4 DRAIN PLUG...6 LABEL...7 CYLINDER HEAD AND COVER...8 AIR CLEANER...0 EXHAUST MUFFLER... CAMSHAFT... FLYWHEEL... PISTON AND CON-ROD...4 BALANCER SHAFT...5 OIL PUMP AND GOVERNOR...6 OIL PRESSURE SWITCH...7 COVER...8 COOLING FAN CASE...9 FUEL INJECTION PARTS...0 SPEED CONTROL DEVICE... RECOIL STARTER ASSEMBLY... STARTING MOTOR... HARNESS AND REGULATOR...4 DYNAMO ASSEMBLY...5 ACCESSORIES...6 TOOL AND GASKET SET...7 Yanmar 45cc Diesel Engine (G40) Parts Manual
CYLINDER BLOCK 6 5 4 8 7 4 0 5 6 9 9 7 8 0 4 Yanmar 45cc Diesel Engine (G40) Parts Manual
0L60SRV HEAD GASKET KIT (INCLUDES ITEMS AND ) 0L609 HEAD GASKET 0L6040 O-RING 0L604 PIN (8X) 4 0L604 SHIM SET 5 0L604 COVER 6 0L600 GASKET 7 0L6044 DOWEL PIN (M4X8) 8 0L6045 PLUG (R0) 9 0L6046 STUD (M6X8) 0 0L6054 STUD (M6X) 0L6077 NUT (M6) 0L608 CRANKCASE GASKET 0L6050 CRANKCASE COVER (D) 4 0L605 MAIN BEARING 5 0L605 OIL INLET PIPE 6 0H40406 PLATED BOLT (M8X5) 6 7 0L6056 BEARING RETAINER 8 0L6057 BEARING (HR608G) 9 0L6058 BEARING (50) 0 0L6060 OIL SEAL (TC55008) 0L6060 OIL SEAL (TC55008) 0H40405 PLATED BOLT (M8X) Yanmar 45cc Diesel Engine (G40) Parts Manual 5
DRAIN PLUG x 0L606 PLUG (M6) 0L606 CAP ASSEMBLY 0L6064 SEAL WASHER (6) 6 Yanmar 45cc Diesel Engine (G40) Parts Manual
LABEL 0L6047 YANMAR MARK B LABEL 0L6048 DIESEL LABEL 0L604 CONSTANT SPEED LABEL Yanmar 45cc Diesel Engine (G40) Parts Manual 7
CYLINDER HEAD AND COVERc 9 0 0 7 8 7 6 5 4 9 6 8 5 4 8 Yanmar 45cc Diesel Engine (G40) Parts Manual
0L6065 CYLINDER HEAD BOLT (A) 0L6066 CYLINDER HEAD BOLT (B) 0L6067 CYLINDER HEAD ASSEMBLY 0L6ASRV VALVE KIT (INCLUDES ITEMS 4, 5, 6, 7, 8,, AND 5) 4 0L6068 INTAKE VALVE 5 0L6069 EXHAUST VALVE 6 0L6070 VALVE SPRING 7 0L607 SPRING RETAINER 8 0L607 COTTER ASSEMBLY 9 0L607 ROCKER ARM SUPPORT ASSEMBLY 0 0L6074 SUPPORT BOLT 0L600 VALVE STEM SEAL 0L60 VALVE CAP 0L608 NOZZLE PROTECTOR 4 0L609 NOZZLE SEAT 5 0L6075 WASHER 6 0L605 NOZZLE RETAINER 7 0789080 SPRING PIN (4.0X8) 8 0L6076 STUD (M6X55) 9 0L6077 NUT (M6) 0 0L6078 VALVE COVER GASKET 0L6079 VALVE COVER ASSEMBLY 0L60 PLATED BOLT (M6X65) Yanmar 45cc Diesel Engine (G40) Parts Manual 9
AIR CLEANER 4 0 9 7 6 5 8 AIR CLEANER GASKET (IN GASKET KIT) 0L609 NUT (M6) 0L608 AIR CLEANER ASSEMBLY 4 0L608 AIR CLEANER BODY ASSEMBLY 5 0L606 AIR CLEANER COVER ASSEMBLY ( INCLUDES AIR CLEANER LABEL) 6 0L609 WING NUT 7 0L60 AIR FILTER ELEMENT ASSEMBLY 8 0L6040 LOCKING KNOB 9 0L600 PLATED BOLT (M6X40) 0 0L6080 STUD (M6X5) 0 Yanmar 45cc Diesel Engine (G40) Parts Manual
EXHAUST MUFFLER 6 5 4 0L6084 MUFFLER GASKET 0L6085 MUFFLER ASSEMBLY 0H404056 PLATED BOLT (M8X0) 4 0L6088 STUD (M8X8) 5 0L60 NUT (M8) 6 0L6089 EXHAUST DEFLECTOR ASSEMBLY Yanmar 45cc Diesel Engine (G40) Parts Manual
CAMSHAFT 0L604 PUSHROD ASSEMBLY Yanmar 45cc Diesel Engine (G40) Parts Manual
FLYWHEEL 4 0L6090 NUT 0L609 WASHER 0L609 FLYWHEEL ASSEMBLY (DE) 4 0L60 KEY (5X4) Yanmar 45cc Diesel Engine (G40) Parts Manual
PISTON AND CON-ROD 4 0L609 PISTON WITH RINGS (D) 0L6094 PISTON PIN D= 0L6095 SEEGER RING (J) 4 0L6096 CONNECTING ROD ASSEMBLY 4 Yanmar 45cc Diesel Engine (G40) Parts Manual
BALANCER SHAFT 0L6097 BALANCER SHAFT ASSEMBLY 0L6098 BALL BEARING (604C) Yanmar 45cc Diesel Engine (G40) Parts Manual 5
OIL PUMP AND GOVERNOR 5 9 4 7 6 8 0789059 OIL PUMP ASSEMBLY 0L6099 COVER 0L6000 O-RING 4 0L600 PARALLEL PIN (MX6) 5 0J7488007 PLATED BOLT (M6X) 6 0L600 OIL FILTER ASSEMBLY 7 0L60 PLATED BOLT (M6X6) 8 0L600 GOVERNOR LEVER ASSEMBLY 9 0L6004 GOVERNOR ASSEMBLY (INCLUDES GOVERNOR WEIGHT ASSEMBLY) 6 Yanmar 45cc Diesel Engine (G40) Parts Manual
OIL PRESSURE SWITCH 078908 OIL PRESSURE SWITCH (.0KG) Yanmar 45cc Diesel Engine (G40) Parts Manual 7
COVER 5 4 0L6006 GROMMET 0L6007 SIDE COVER B 0L6008 RUBBER SEAL 4 0L6005 COLLAR 5 0J74890 PLATED BOLT (M6X0) 8 Yanmar 45cc Diesel Engine (G40) Parts Manual
COOLING FAN CASE 4 5 0L600 COOLING FAN CASE 0L60 RUBBER CUSHION 4 0L60 COLLAR 4 4 0L60 FAN CASE SEAL 5 0L6009 FAN CASE BOLT 4 Yanmar 45cc Diesel Engine (G40) Parts Manual 9
FUEL INJECTION PARTS 4 6 5 0L60 FUEL INJECTION PUMP ASSEMBLY 0L60 INJECTION VALVE ASSEMBLY 0L60 INJECTION PIPE ASSEMBLY 4 0L604 PIPE SUPPORT 5 0L60 FUEL SHUT OFF VALVE ASSEMBLY 6 0L605 GASKET (0X.) 0 Yanmar 45cc Diesel Engine (G40) Parts Manual
SPEED CONTROL DEVICE x 7 5 4 6 0L604 CONSTANT SPEED LABEL 0L604 HANDLE BRACKET ASSEMBLY 0L607 PLAIN WASHER (4) 4 0L608 PLATE 5 0L604 LIMITER ASSEMBLY FO 6 0L604 NUT (M4X.5) 7 0L605 PROTECTOR ASSEMBLY SEE ITEM 7 O- RING (AP8.0) (INCLUDED WITH ITEM 7) Yanmar 45cc Diesel Engine (G40) Parts Manual
RECOIL STARTER ASSEMBLY 4 0L606 RECOIL ASSEMBLY 0L607 STARTER PULLEY 0L605 PLATED BOLT (M6X8) 4 4 0J7488007 PLATED BOLT (M6X) Yanmar 45cc Diesel Engine (G40) Parts Manual
STARTING MOTOR 0L608 STARTER ASSEMBLY 0L606 PLATED BOLT (M0X0) 0L607 NUT (M8) Yanmar 45cc Diesel Engine (G40) Parts Manual
HARNESS AND REGULATOR 4 0L609 REGULATOR AND HARNESS ASSEMBLY 0L608 SCREW (M4X0) 0J7488007 PLATED BOLT (M6X) 4 0J74890 PLATED BOLT (M6X0) 4 Yanmar 45cc Diesel Engine (G40) Parts Manual
DYNAMO ASSEMBLY 4 5 0L600 DYNAMO ASSEMBLY 0L60 CORD CLAMP 0L60 COUNTERSUNK SCREW (M6) 4 0J7488007 PLATED BOLT (M6X) 5 0J74890 PLATED BOLT (M6X0) Yanmar 45cc Diesel Engine (G40) Parts Manual 5
ACCESSORIES 4 0L605 LIFTING BOLT 0J748900 WASHER (8) 0L606 COUPLER 4 0L607 ORIFICE 6 Yanmar 45cc Diesel Engine (G40) Parts Manual
TOOL AND GASKET SET 4 5 6 7 8 9 0 4 5 6 7 8 9 0 0L608 TOOL AND GASKET SET HEAD GASKET O-RING 4 CRANKCASE GASKET 5 GASKET 6 O-RING 8 7 VALVE COVER GASKET 8 VALVE STEM SEAL 9 NOZZLE GASKET 0 AIR CLEANER GASKET AIR CLEANER GASKET MUFFLER GASKET PIPE GASKET 4 GASKET 5 O-RING 6 GASKET 4 7 GASKET 8 SEAL WASHER 6 9 GASKET (8X.0) 0 GASKET (X.0) O-RING (AP40.0) O-RING (AS5.0) O-RING (AS.4) Yanmar 45cc Diesel Engine (G40) Parts Manual 7
Part No. 0L6PMNL Rev A 08//05 Printed in USA Generac Power Systems, Inc. All rights reserved Specifications are subject to change without notice. No reproduction allowed in any form without prior written consent from Generac Power Systems, Inc. Generac Power Systems, Inc. S45 W990 Hwy. 59 Waukesha, WI 589-888-GENERAC (-888-46-7) generac.com