Honda G65/G80 Engines Service Manual

Service and repair information for Honda G65 and G80 engines, covering specifications, performance curves, dimensions, maintenance, and troubleshooting. Part numbers like 07935-8050001 are referenced.

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Document Details

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Document Number / Seller:
30509 / Karen Phillips
File Size:
10.64 MB
File Type:
PDF
Language:
English
Printable:
Yes
Category:
Engines (Gasoline)
Last updated / verified
Apr 10, 2025

Models Covered & Key Technical Specifications

Honda G65 & G80 Engine Service Manual

Honda G65/G80 (November, 1975) | Gasoline Engine Series. Documentation.

  • Established Load Capacity: 8.0 PS at 4,000 rpm is the maximum output for the G80 model.
  • Operational Environmental Range: Forced air cooling is utilized to maintain optimal operating temperatures across varying conditions.
  • Essential Power Rating: 6.8 PS at 4,000 rpm signifies the maximum output for the G65 model.
  • Baseline Fuel Consumption: 300 g/PS-H indicates the fuel efficiency under standard operating loads.
  • Approved Ignition Timing: 25° BTDC is the fixed ignition timing specification for consistent engine performance.
  • Measured Lubricant Capacity: 0.82 L (1.7 U.S. pt.) is the required lubricant volume for the G 65 model's splash lubrication system.

Professional Workshop Service Manual & Technical Specifications

Honda G65 & G80 Engine Service Manual: Comprehensive Maintenance & Repair Procedures

Model-Portfolio: Honda G65, G80 // Performance-Values: Gasoline / Engine Logic // Model-Portfolio: 1975 Technical-Data.

OEM specifications cover engine systems, component procedures, and maintenance schedules for the Honda G65 and G80 gasoline engines. This manual details disassembly and assembly for critical engine parts such as the cylinder head, crankshaft, and starting motor. It also provides diagnostic flowcharts for troubleshooting common issues like hard starting and lack of power.

Assessment-Element Rating Validation-Data
Engine Oil Inspection & Renewal P.34
Fuel Strainer Cleaning P.15
Air Cleaner Inspection & Cleaning P.16
Spark Plug Cleaning/Adjustment P.31, P.32
Ignition Timing Inspection/Adjustment P.27
Tappet Clearance Inspection/Adjustment P.31, P.33
Combustion Chamber Cleaning inc. Valve Lapping P.32, P.33
Fuel Tube Replacement P.18
Speed Reduction Gear Oil Inspection & Renewal P.42, P.43
Electrolyte Level (Starting Motor Equip. Model) Inspection P.46

Engine rebuild procedures are documented for various components, including the cylinder head and valves, detailing their proper disassembly and assembly. Drivetrain specifications are addressed in sections covering the crankshaft, camshaft, and reduction units, with diagrams for installation.

Technically requiring proper assembly stress control, the manual documents torque specifications for critical components such as the fuel tank and cylinder head to ensure proper assembly stress control. This ensures the longevity and safe operation of the engine.

FAQ

What **tools** are recommended for tappet adjustment procedures? keyboard_arrow_down

A surface plate and oil stone are recommended for tappet clearance adjustment, alongside a valve stem lapping guide (No. 07975-8050000) for precise adjustments.

Identify the **critical** pressure specifications for cylinder compression. keyboard_arrow_down

If cylinder compression reads over 4 kg/cm², the engine is considered normal at the specified 450-600 rpm.

What **procedures** are required for valve seat reseating? keyboard_arrow_down

After reseating, lap valves into seats using a hand valve lapper (No. 07351-0020000) and a compound and oil mixture between the valve and seat, rotating them together.

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The download process was smooth, and I received the link almost immediately. Great support!
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The instructions are clear and easy to follow. I appreciated the quick response from customer service when I had a question!
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Rated 4 out of 5 stars
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This manual is incredibly detailed and comprehensive. The troubleshooting section has saved me so much time!