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Yamaha EH64, EH65 - User Manual

Yamaha EH64, EH65
194 pages
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SERVICE MANUAL
EH63
EH64
EH65
EH72
7D5-28197-E0
2019.03×1
!
7D5-28197-E0_cover.indd 1-2 2019/03/12 10:04:33

Table of Contents

Questions and Answers

  • F
    Felicia Medina DDSAug 10, 2025
    What to do if my Yamaha EH64, EH65 does not start?
    • M
      Michael PopeAug 10, 2025
      If your Yamaha Engine won't start, begin by checking the oil and fuel levels, adding more if they are insufficient. If the issue persists, consider replacing the fuel. Inspect the spark plug, re-gapping or replacing it as necessary. If the ignition spark gap is adequate, the ignition system should be in working order. If not, consider replacing the ignition coil. Clean the engine to ensure optimal performance.
  • M
    Margaret CampbellAug 18, 2025
    What to do if the valve face and valve seat are causing my Yamaha Engine not to start?
    • M
      Meagan WestAug 18, 2025
      If your Yamaha Engine is not starting, the issue might be related to the valve face and valve seat. Consider resurfacing or replacing them to address the problem.
  • F
    Frances WeaverAug 26, 2025
    Why won't my Yamaha EH64, EH65 start, and how does compression affect it?
    • C
      caldwelltinaAug 26, 2025
      If a Yamaha Engine won't start, it could be due to high or low compression. If compression is too high, decarbonize the combustion chamber to remove carbon deposits. If it's too low, further checks are needed.
  • N
    Nicole CombsSep 2, 2025
    What to do if I need to rebore or replace parts on my Yamaha EH64, EH65 to get it to start?
    • C
      Cameron WigginsSep 2, 2025
      If your Yamaha Engine is not starting, it might be necessary to rebore or replace parts to fix the issue.

Summary

GENERAL INFORMATION

MACHINE IDENTIFICATION

Identifies engine model and production number via serial label.

PERIODIC CHECKS AND ADJUSTMENTS

MAINTENANCE INTERVALS SCHEDULE

ENGINE SPEED ADJUSTMENT PROCEDURES

ENGINE SERVICE PROCEDURES

ENGINE INSPECTION AND COMPRESSION TESTING

Covers engine inspection, including measuring compression pressure for diagnostics.

AIR FILTER, MUFFLER, AND OIL COOLER SERVICE

CYLINDER HEAD AND VALVE SYSTEM SERVICE

OIL PUMP AND PISTON;CRANKSHAFT ASSEMBLY SERVICE

Covers service for oil pump, pistons, camshaft, crankshaft, and crankcase.

FUEL SYSTEM SERVICE

FUEL PUMP OPERATION AND MAINTENANCE

CARBURETOR ASSEMBLY AND ADJUSTMENT

Details carburetor service, including disassembly, assembly, and governor adjustment.

ELECTRICAL SYSTEM SERVICE

CIRCUIT DIAGRAM AND COMPONENT IDENTIFICATION

ELECTRICAL COMPONENT TESTING PROCEDURES

ELECTRIC STARTING AND CHARGING SYSTEM DIAGNOSIS

TROUBLESHOOTING GUIDE

ENGINE STARTING AND RUNNING PROBLEMS

Addresses issues like engine not starting, stalling, or uneven speed.

GOVERNOR OPERATION DIAGNOSIS

SPECIFICATIONS AND TORQUE VALUES

GENERAL AND MAINTENANCE SPECIFICATIONS

Lists engine, piston, ring, valve, and crankshaft specifications.

TIGHTENING TORQUES AND LUBRICATION GUIDELINES

Provides standard torque values and lubrication guidelines for engine components.

APPENDIX

CIRCUIT DIAGRAM DETAILS

Yamaha EH64, EH65 Specifications

General IconGeneral
BrandYamaha
ModelEH64, EH65
CategoryEngine
LanguageEnglish

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