Yamaha MZ300 Service Manual
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Yamaha MZ300 Service Manual

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SUPPLEMENTARY
SERVICE MANUAL
LIT-19616-01-81
MZ300
MZ360
7CR-F8197-10

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Summary of Contents for Yamaha MZ300

  • Page 1 SUPPLEMENTARY SERVICE MANUAL MZ300 MZ360 LIT-19616-01-81 7CR-F8197-10...
  • Page 3 This manual was written by the YAMAHA death. MOTOR POWERED PRODUCTS CO., LTD. primarily for use by Yamaha dealers and their WARNING qualified mechanics. It is not possible to put an A WARNING indicates a hazardous situa- entire mechanic’s education into one manual,...
  • Page 4 ILLUSTRATED SYMBOLS (Refer to the illustration) SYMBOL DEFINITION SYMBOL DEFINITION General information Wear limit, clearance Periodic inspections and Engine speed adjustments Engine Electrical data Electrical Molybdenum disulfide oil Specifications Engine oil Special tool Lithium-soap base grease Filling fluid Apply locking agent (LOCTITE®). Lubricant Replace the part with a new one.
  • Page 5 INDEX GENERAL INFORMATION INFO PERIODIC INSPECTIONS AND ADJUSTMENTS INSP SPECIFICATIONS SPEC...

  • Page 6: Table Of Contents

    CHAPTER 1. GENERAL INFORMATION MACHINE IDENTIFICATION .....1-1 SERIAL NUMBER ........1-1 STARTING SERIAL NUMBER ....1-1 DIMENSIONS ..........1-2 DIMENSION CHART ......1-2 MOUNTING BASE ........1-2 TOP ............1-3 SIDE ............1-3 FRONT ..........1-4 SPECIAL TOOLS AND TESTERS .....1-5 CHAPTER 2. PERIODIC INSPECTIONS AND ADJUSTMENTS INTRODUCTION ........2-1 PERIODIC MAINTENANCE/ LUBRICATION INTERVALS ......2-1 CHAPTER 3.

  • Page 7: Chapter 1. General Information

    The first four digits identifies a model, and the remaining digits indicates a production number. STARTING SERIAL NUMBER Model Code Serial number A MZ300 A2 7CRJ 7CRJ-1000101 7CR – B MZ360 A2 7CTJ 7CTJ-1000101 Designs and specifications are subject to change without notice.

  • Page 8: Dimensions

    DIMENSIONS INFO DIMENSIONS DIMENSION CHART Unit: mm Model (Code) PTO shaft dimensions (Type) Mounting face dimensions 3/8-24UNF-2B MZ300 A2 (7CRJ) +0.058 6.31 88.5 60.3 72.2 MZ360 A2 (7CTJ) 1.25 3/8-16UNC DEPTH 18 *1: UNF; Unified fine thread (Unit: in) *2: UNC; Unified coarse thread (Unit: in)

  • Page 9: Top

    DIMENSIONS INFO (Unit: mm) SIDE (Unit: mm) 1.25 DEPTH 18 90.5 (195.5)

  • Page 10: Front

    DIMENSIONS INFO FRONT (Unit: mm) 27 (SLOT HOLE) 11 (HOLE) (16) (37)

  • Page 11: Special Tools And Testers

    SPECIAL TOOLS AND TESTERS INFO SPECIAL TOOLS AND TESTERS The proper special tools are necessary for complete and accurate tune-up and assembly. Using the correct special tool will help pre- vent damage caused by the use of improper tools or improvised techniques.
  • Page 12 SPECIAL TOOLS AND TESTERS INFO 7. Analog pocket tester P/N. YU-03112-C Pocket tester P/N. 90890-03112 This instrument is necessary for checking the electrical system. SVU1230 8. Oppama pet-4000 spark checker P/N. YM-34487 Ignition checker 90890-06754 This instrument is necessary for checking the ignition system components.

  • Page 13: Periodic Inspections And Adjustments

    INTRODUCTION/ INSP PERIODIC MAINTENANCE/LUBRICATION INTERVALS PERIODIC INSPECTIONS AND ADJUSTMENTS INTRODUCTION This chapter includes all information necessary to perform recommended inspections and adjust- ments. These preventive maintenance procedures, if followed, will ensure more reliable machine operation and a longer service life. The need for costly overhaul work will be greatly reduced. This information applies to machines already in service as well as new machines that are being pre- pared for sale.
  • Page 14 INTRODUCTION/ INSP PERIODIC MAINTENANCE/LUBRICATION INTERVALS Initial Every Pre-Opera- Item Remarks tion check 1 month 3 months 6 months 12 months (daily) or 20 hr or 50 hr or 100 hr or 300 hr More frequency if 15. Decarbonization necessary. Check all fittings and Fittings/ fasteners.

  • Page 15: Chapter 3. Specifications

    SPEC GENERAL SPECIFICATIONS SPECIFICATIONS GENERAL SPECIFICATIONS Model name MZ300 MZ360 Model code number 7CRJ 7CTJ Dimensions: Overall length mm (in) 425 (16.7) Overall width mm (in) 451 (17.8) Overall height mm (in) 485 (19.1) Engine: Type Air cooled 4-stroke gasoline OHV Rated out put 6.8 (9.2) / 3600...

  • Page 16: Maintenance Specifications

    SPEC MAINTENANCE SPECIFICATIONS MAINTENANCE SPECIFICATIONS ENGINE Model name MZ300 MZ360 Model code number 7CRJ 7CTJ Piston: mm (in) 77.960–77.980 84.977–84.998 Piston skirt “D” (3.0693–3.0701) (3.3456–3.3463) <Limit> 77.904 (3.0671) 84.921 (3.3433) Piston pin hole inside 20.004–20.015 (0.7874–0.7880) diameter Piston ring: mm (in) Top ring Dimensions “B ×...

  • Page 17: Electrical

    SPEC MAINTENANCE SPECIFICATIONS Model name MZ300 MZ360 Model code number 7CRJ 7CTJ Carburetor: Type BV24-18 BV26-20 Bore size ø24 ø26 Main jet #100 #112.5 Pilot jet #53.8 #57.5 Pilot screw 1-1/2 1-3/4 Valve seat size ø1.8 Float height “H” mm (in) 14.9 (0.59)
  • Page 18 SPEC...
  • Page 20 PRINTED IN USA...

This manual is also suitable for:

Mz360

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