4HP 1978 4R78 Johnson outboard motor Service Manual

Original 1978 4R78 Johnson 4HP Service/Repair Manual

This Service Manual includes the specific information you will need to service the motor. All general procedures are covered in abbreviated form, mostly by reference to procedural illustrations.
The specific procedures which apply only, or primarily, to this motor are covered in fully-illustrated , detailed, step-by-step instructions.
Item No. JM-7803

Full factory workshop manual for this Vintage Outboard engine. Covers every aspect of service and repair.

Manual covers the following outboard models:

- 4R78
- 4RL78
- 4W78

Manual Chapters:
- INTRODUCTION
- GENERAL SERVICE INFORMATION
- FUEL SYSTEM
- IGNITION SYSTEM
- POWERHEAD
- LOWER UNIT
- MANUAL STARTER
- DIAGRAM
- UPDATES TO SERVICE MANUAL

Unlike aftermarket repair manual this is the Original service manual which includes all information specific to 1978 4HP Johnson Outboards.
This is NOT a Seloc or Clymer repair manual.

1978 Johnson 4HP outboards Service Repair Manual P/N JM-7803

Buy this Manual in PDF format

Pages in Service Manual: 89
Manual size: 15.13MB

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