Mercury 225 EFI, Service Manual

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LEFT HAND NON-RATCHETING
Page 6B-66 90-884294 OCTOBER 2001
3. Measure distance (a) and increase that distance by 1 in. (25.4mm) by turning bottom
nut away from top nut.
57937
a
b
a - Distance 1 in. (25.4mm)
b - Bottom nut [screwed down approximately 1 in. (25.4mm)]
Pinion Gear Location
CHECKING AND ADJUSTING
Pinion Depth – 0.025 in. (0.64mm)
NOTE: If the bearing preload tool has not already been set up, refer to “Drive Shaft - Bear-
ing Preload Tool”, ‘Installation’ section first.
NOTE: The prop shaft and reverse gear can be installed when checking pinion height IF
Pinion Height Tool 91-56048 is used.
1. Place the pinion gear shimming tool into the gear housing.
NOTE: Take the following measurements at 3 locations, rotating the drive shaft 120 de-
grees between each reading (always rotate the drive shaft in a clockwise direction).
2. Insert the thickest feeler gauge that fits snugly between one tooth of the pinion gear
and high point of the shimming tool.
3. Rotate the drive shaft 120 degrees in a clockwise direction and take another reading.
4. Repeat this process until 3 readings have been taken.
5. Add the three readings together and divide the sum by 3 to get the average pinion gear
height. Make note of this average measurement.
The average pinion gear height should be 0.025 in. (0.64mm).
6. A. If the (average) pinion gear location does not meet the specification of 0.025 in.
(0.64 mm) continue with the instructions on the following section.
B. If the (average) pinion gear location meets specification, skip the following section
and go on to the “Reverse Gear Backlash”, ‘Checking’ section.