1986+ Mercury 6/8/9.9/10/15HP 2-stroke Factory Service Manual, Page 178Get this manual

POWERHEAD
REED OPENING
1Check reeds for preload and stand open conditionsStand open should not exceed 0.178mm (0.007 inReplace reeds if necessary

aFeeler gaugeReedSeal

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