1978 Johnson 4HP Outboard Service Manual

Providing Service and Repair for the following Model #s: 4R78, 4RL78, 4W78 | Publication Number JM7803 | Approximately 80 pages | Published by Outboard Marine Corporation

This manual cover specifications, diagnosis and testing, component removal, teardown and rebuild. It is very detailed with good diagrams, photos and exploded views. A must for anyone who insists on Genuine OEM quality parts.

Table of Contents

• Introduction
• General Service Information
• Fuel System
• Ignition System
• Powerhead
• Lower Unit
• Electrical System
• Manual Starter
• Wiring Diagrams

Condition

Good usable condition. Covers show some wear. All pages are in place and straight. Page surfaces are mostly clean.