2003 ST 4 Stroke 9.9/15HP Johnson outboards Service Manual, Page 167Get this manual
LOWER UNIT
SERVICE DATA
SERVICE DATA
Preliminary gear shim and thrust washer Numeric indexItem Available thickness Design Specification thickness
Pinion gear back-up shim (mm) Forward gear back-up shim (mm)
0.7, 0.8, 0.9, 1.0,1.1,1.2, 1.3 0.7,0.8,0.9, 1.0,1.1,1.2, 1.3 1.5 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7,1.8,1.9 0.7,0.8,0.9, 1.0,1.11.2, 1.3