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Subaru ER12 - User Manual

Subaru ER12
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SERVICE MANUAL
ER12ER12

Questions and Answers

Summary

1. Specifications

2. Performance

2-1 Maximum Output

Engine output at full throttle after break-in.

2-2 Continuous Rated Output

Engine output at optimum speed for life and fuel efficiency.

2-3 Maximum Torque

Torque at output shaft at maximum output r.p.m.

3. Features

3-1 Developed Exclusively for Rammer

Engine designed for rammer needs: durability, power, mountability.

3-2 Lightweight and Compact Design

Highlights engine's light weight and compact dimensions for ease of use.

3-3 Designed to Offer Superior Mountability

Focuses on optimal center of gravity for balance and mounting ease.

3-4 Users Safety as Well as User Friendliness

Covers safety features like oil sensor and auto-shutoff.

3-5 Ease of Maintenance and Economical Efficiency

Discusses design for maintenance ease and economical operation.

4. General Description of Engine Components

4-1 Cylinder and Crankcase

Describes integrated aluminum die-cast cylinder and crankcase.

4-2 Main Bearing Cover

Details heavy-duty cover for inspection and mounting.

4-3 Crankshaft

Explains forged carbon steel crankshaft with induction-hardened crank pin.

4-4 Connecting Rod and Piston

Describes aluminum alloy connecting rod and piston with rings.

4-5 Piston Rings

Details piston rings, including top ring taper and three-piece oil ring.

4-6 Campulley

Explains single-piece nylon campulley with cam and decompression lever.

4-7 Valve Arrangement

Describes belt-driven overhead cam and overhead valve construction.

4-8 Cylinder Head

Details aluminum die-cast cylinder head with lens-shaped combustion chamber.

4-9 Governor System

Explains centrifugal flyweight governor for constant engine speed.

4-10 Cooling System

Describes forced air-cooling system using flywheel fan.

4-11 Lubrication System

Details lubrication using trochoid oil pump and splash lubrication.

4-12 Timing Belt

Explains timing belt for lubricating cylinder head and driving camshaft.

4-13 Ignition System

Describes pointless flywheel magneto ignition system with CPU and CDI.

4-14 Carburetor

Introduces float type and diaphragm type carburetors.

4-15 Air Cleaner

Details heavy-duty dual-element air cleaner system.

4-16 Decompression System

Explains automatic decompression system for easier starting.

4-17 Sectional View of the Engine

Provides cross-sectional views of the engine for component identification.

5. Disassembly and Reassembly

5-1 Preparations and Precautions

Essential steps before disassembly: memorizing parts, storing them properly.

5-2 Special Tools

Lists specialized tools required for engine disassembly and reassembly.

5-3 Disassembly Procedure

Step-by-step guide for disassembling engine parts like air cleaner, muffler, recoil starter.

5-4 Reassembly Procedure

Details steps and precautions for engine reassembly, ensuring proper alignment and torque.

6. Engine Oil

6-1 Classification by Oil Grade

Classifies engine oil by API grade, recommending SE or higher.

6-2 Classification by Oil Viscosity

Categorizes engine oil by SAE viscosity grades for different temperatures.

6-3 Adding and Changing Engine Oil

Guidelines for inspecting, filling, and changing engine oil based on usage.

7. Lubrication System

7-1 Operation and Function

Explains forced pressure spray and splash lubrication system with trochoid oil pump.

7-2 Oil Sensor

Details oil sensor system (pressure switch and CPU) for monitoring oil pressure.

7-3 Breather System

Describes breather system function for reducing crankcase pressure and preventing oil leakage.

8. Magneto

8-1 Magneto

Explains CDI/CPU magneto ignition system and its components.

8-2 Inspecting the Magneto

Provides procedures for inspecting magneto for defects, focusing on sparking and cable checks.

9. Wiring Diagram

10. Automatic Decompression System

10-1 Functions and Construction

Explains automatic decompression system's role in easing engine starting.

10-2 Inspection

Details inspection of release lever mechanism for smooth operation after assembly.

11. Carburetor

11-1 Specifications

Lists specifications for float type carburetor: jets, venturi bore.

11-2 Functions and Construction

Explains functions of float, slow, main, and choke systems within the carburetor.

11-3 Float Type Carburetor

Details operation and construction of the float type carburetor's systems.

11-4 Diaphragm Type Carburetor

Explains operation and construction of diaphragm type carburetor's systems.

11-4-2 Disassembly Procedure

Step-by-step instructions for disassembling diaphragm type carburetor for maintenance.

11-4-3 Inspection Procedure

Outlines inspection procedures for diaphragm type carburetor components after disassembly.

12. Recoil Starter

12-1 Recoil Starter

Introduces recoil starter mechanism and lists required tools for disassembly.

12-1-1 Disassembly Procedure

Step-by-step guide for disassembling recoil starter, including spring power release.

12-1-2 Reassembly Procedure

Provides steps for reassembling recoil starter, focusing on component mounting and spring tensioning.

12-1-3 Checking the Recoil Starter After Reassembly

Describes checking recoil starter functionality after reassembly for correct operation.

12-1-4 Other Guides

Offers guidance on handling spring during disassembly and lubrication for storage.

13. Installation

13-1 Installing

Focuses on proper engine installation, coupling with equipment, and foundation support.

13-2 Ventilation

Explains importance of fresh air for cooling and preventing overheating.

13-3 Exhaust Equipment

Covers exhaust gas, pipe length, diameter, and safety recommendations.

13-4 Fuel System

Provides guidelines for fuel tank height, fuel pump, and fuel line piping.

13-5 Power Transmission to Drive Machines

Details clutch fitting onto PTO shoulder, emphasizing proper chamfering.

14. Troubleshooting

14-1 Engine

Addresses starting difficulties, covering ignition, fuel system, and engine component issues.

15. Standard Repair Tables

15-1 Standard Dimensions and Limits of Use

Provides standard dimensions and wear limits for engine components.

15-2 Service Data

Presents reference data for compression pressure, fuel consumption, and lubricant efficacy.

15-3 Tightening Torque

Lists tightening torque specifications for engine bolts and nuts.

15-4 Air Gap and Clearance

Specifies air gap and clearance values for critical engine components.

16. Maintenance and Storage

16-1 Daily Maintenance (Every 8 Hours of Use)

Outlines daily maintenance tasks and their reasons, focusing on cleaning and checks.

16-2 Inspection and Maintenance After the First 20 Hours

Specifies initial maintenance after 20 hours: oil change and oil filter cleaning.

16-3 Inspection and Maintenance Every 100 Hours (Every 10 Days)

Details 100-hour maintenance: oil, air cleaner, and spark plug checks.

16-4 Inspection and Maintenance Every 100 to 200 Hours (Every Month)

Outlines monthly maintenance: fuel strainer cleaning and air cleaner element change.

16-5 Inspection and Maintenance Every 300 Hours

Specifies 300-hour tasks: valve clearance, oil filter, and carburetor checks.

16-6 Maintenance Every 500 Hours (Annual Maintenance)

Details annual maintenance: engine overhaul, piston ring, and timing belt replacement.

16-7 Engine Storage

Provides instructions for preparing the engine for long-term storage to prevent rust.

Summary

1. Specifications

2. Performance

2-1 Maximum Output

Engine output at full throttle after break-in.

2-2 Continuous Rated Output

Engine output at optimum speed for life and fuel efficiency.

2-3 Maximum Torque

Torque at output shaft at maximum output r.p.m.

3. Features

3-1 Developed Exclusively for Rammer

Engine designed for rammer needs: durability, power, mountability.

3-2 Lightweight and Compact Design

Highlights engine's light weight and compact dimensions for ease of use.

3-3 Designed to Offer Superior Mountability

Focuses on optimal center of gravity for balance and mounting ease.

3-4 Users Safety as Well as User Friendliness

Covers safety features like oil sensor and auto-shutoff.

3-5 Ease of Maintenance and Economical Efficiency

Discusses design for maintenance ease and economical operation.

4. General Description of Engine Components

4-1 Cylinder and Crankcase

Describes integrated aluminum die-cast cylinder and crankcase.

4-2 Main Bearing Cover

Details heavy-duty cover for inspection and mounting.

4-3 Crankshaft

Explains forged carbon steel crankshaft with induction-hardened crank pin.

4-4 Connecting Rod and Piston

Describes aluminum alloy connecting rod and piston with rings.

4-5 Piston Rings

Details piston rings, including top ring taper and three-piece oil ring.

4-6 Campulley

Explains single-piece nylon campulley with cam and decompression lever.

4-7 Valve Arrangement

Describes belt-driven overhead cam and overhead valve construction.

4-8 Cylinder Head

Details aluminum die-cast cylinder head with lens-shaped combustion chamber.

4-9 Governor System

Explains centrifugal flyweight governor for constant engine speed.

4-10 Cooling System

Describes forced air-cooling system using flywheel fan.

4-11 Lubrication System

Details lubrication using trochoid oil pump and splash lubrication.

4-12 Timing Belt

Explains timing belt for lubricating cylinder head and driving camshaft.

4-13 Ignition System

Describes pointless flywheel magneto ignition system with CPU and CDI.

4-14 Carburetor

Introduces float type and diaphragm type carburetors.

4-15 Air Cleaner

Details heavy-duty dual-element air cleaner system.

4-16 Decompression System

Explains automatic decompression system for easier starting.

4-17 Sectional View of the Engine

Provides cross-sectional views of the engine for component identification.

5. Disassembly and Reassembly

5-1 Preparations and Precautions

Essential steps before disassembly: memorizing parts, storing them properly.

5-2 Special Tools

Lists specialized tools required for engine disassembly and reassembly.

5-3 Disassembly Procedure

Step-by-step guide for disassembling engine parts like air cleaner, muffler, recoil starter.

5-4 Reassembly Procedure

Details steps and precautions for engine reassembly, ensuring proper alignment and torque.

6. Engine Oil

6-1 Classification by Oil Grade

Classifies engine oil by API grade, recommending SE or higher.

6-2 Classification by Oil Viscosity

Categorizes engine oil by SAE viscosity grades for different temperatures.

6-3 Adding and Changing Engine Oil

Guidelines for inspecting, filling, and changing engine oil based on usage.

7. Lubrication System

7-1 Operation and Function

Explains forced pressure spray and splash lubrication system with trochoid oil pump.

7-2 Oil Sensor

Details oil sensor system (pressure switch and CPU) for monitoring oil pressure.

7-3 Breather System

Describes breather system function for reducing crankcase pressure and preventing oil leakage.

8. Magneto

8-1 Magneto

Explains CDI/CPU magneto ignition system and its components.

8-2 Inspecting the Magneto

Provides procedures for inspecting magneto for defects, focusing on sparking and cable checks.

9. Wiring Diagram

10. Automatic Decompression System

10-1 Functions and Construction

Explains automatic decompression system's role in easing engine starting.

10-2 Inspection

Details inspection of release lever mechanism for smooth operation after assembly.

11. Carburetor

11-1 Specifications

Lists specifications for float type carburetor: jets, venturi bore.

11-2 Functions and Construction

Explains functions of float, slow, main, and choke systems within the carburetor.

11-3 Float Type Carburetor

Details operation and construction of the float type carburetor's systems.

11-4 Diaphragm Type Carburetor

Explains operation and construction of diaphragm type carburetor's systems.

11-4-2 Disassembly Procedure

Step-by-step instructions for disassembling diaphragm type carburetor for maintenance.

11-4-3 Inspection Procedure

Outlines inspection procedures for diaphragm type carburetor components after disassembly.

12. Recoil Starter

12-1 Recoil Starter

Introduces recoil starter mechanism and lists required tools for disassembly.

12-1-1 Disassembly Procedure

Step-by-step guide for disassembling recoil starter, including spring power release.

12-1-2 Reassembly Procedure

Provides steps for reassembling recoil starter, focusing on component mounting and spring tensioning.

12-1-3 Checking the Recoil Starter After Reassembly

Describes checking recoil starter functionality after reassembly for correct operation.

12-1-4 Other Guides

Offers guidance on handling spring during disassembly and lubrication for storage.

13. Installation

13-1 Installing

Focuses on proper engine installation, coupling with equipment, and foundation support.

13-2 Ventilation

Explains importance of fresh air for cooling and preventing overheating.

13-3 Exhaust Equipment

Covers exhaust gas, pipe length, diameter, and safety recommendations.

13-4 Fuel System

Provides guidelines for fuel tank height, fuel pump, and fuel line piping.

13-5 Power Transmission to Drive Machines

Details clutch fitting onto PTO shoulder, emphasizing proper chamfering.

14. Troubleshooting

14-1 Engine

Addresses starting difficulties, covering ignition, fuel system, and engine component issues.

15. Standard Repair Tables

15-1 Standard Dimensions and Limits of Use

Provides standard dimensions and wear limits for engine components.

15-2 Service Data

Presents reference data for compression pressure, fuel consumption, and lubricant efficacy.

15-3 Tightening Torque

Lists tightening torque specifications for engine bolts and nuts.

15-4 Air Gap and Clearance

Specifies air gap and clearance values for critical engine components.

16. Maintenance and Storage

16-1 Daily Maintenance (Every 8 Hours of Use)

Outlines daily maintenance tasks and their reasons, focusing on cleaning and checks.

16-2 Inspection and Maintenance After the First 20 Hours

Specifies initial maintenance after 20 hours: oil change and oil filter cleaning.

16-3 Inspection and Maintenance Every 100 Hours (Every 10 Days)

Details 100-hour maintenance: oil, air cleaner, and spark plug checks.

16-4 Inspection and Maintenance Every 100 to 200 Hours (Every Month)

Outlines monthly maintenance: fuel strainer cleaning and air cleaner element change.

16-5 Inspection and Maintenance Every 300 Hours

Specifies 300-hour tasks: valve clearance, oil filter, and carburetor checks.

16-6 Maintenance Every 500 Hours (Annual Maintenance)

Details annual maintenance: engine overhaul, piston ring, and timing belt replacement.

16-7 Engine Storage

Provides instructions for preparing the engine for long-term storage to prevent rust.

Subaru ER12 Specifications

General IconGeneral
BrandSubaru
ModelER12
CategoryEngine
LanguageEnglish

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