2003 ST 4 Stroke 9.9/15HP Johnson outboards Service Manual, Page 181Get this manual

LOWER UNIT
REASSEMBLY AND INSTALLATION
FORWARD GEAR

Install: Forward gear shim Forward gear (2) Thrust washer

Ultra HPF Gearcase lube

NOTE: Forward gear back-up shim selection will be done by "TRANSMISSION GEAR ADJUSTMENT"
PROPELLER SHAFT ASSEMBLY

• ATV
• Jet Ski
• Outboard Motors
• Personal Watercraft
• Snowmobiles
• Stern Drives