1998 Yamaha 25J, 30D, 25X, 30X outboards Factory Service Manual, Page 102Get this manual

ASSEMBLY AND ADJUSTMENT
3C alculate th shi thickn ess (T1)Shim thickness (T1)Measured value (M) mm0.1 mmF100 mm

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