Yamaha Marine Outboards Factory Service / Repair/ Workshop Manual 225G 250B L250B, Page 197Get this manual

SHIMMING (REGULAR ROTATION MODELS) (FOR USA AND CANADA)
SELECTING THE FORWARD GEAR SHIMS

NOTE: Find the shim thickness (T1) by selecting shims until the specified value (M0) is obtained with the special tool6525

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