OB3645 Service Manual – Chrysler 55HP

The OB3645 Service Manual is the official factory OEM guide for Chrysler’s 55HP outboard motors (models 559B1N and 559H1N) published for the 1981 series. Released September 1980, this manual offers ~179 pages of comprehensive information including detailed engine specifications, component diagrams, maintenance instructions, and repair procedures.

Inside the OB3645 Service Manual you’ll find:

• Factory power & performance specs — 55 B.I.A. HP at 5000 RPM, displacement about 818 cc, bore & stroke ~3-3/8 × 2.8 in.

• Operating range guidance and idle specifications.

• Visual diagrams & exploded views for the powerhead, lower unit, fuel & ignition systems.

• Electrical schematics, starter & charging systems, and servicing of all major engine parts.

• Torque values, parts lists, and troubleshooting guidance.

Whether you’re doing routine maintenance or restoring a vintage Chrysler outboard, this OB3645 Service Manual gives you original detail with clarity and precision. Shop at Arizona Outboard Dismantlers for the parts you need to stay on the water.
Published by Chrysler Marine (West Bend), the OB3645 manual retains original engineering accuracy. It’s the reference standard for marine mechanics and restoration enthusiasts wanting genuine factory data.