2003 ST 4 Stroke 9.9/15HP Johnson outboards Service Manual, Page 139Get this manual
POWER UNIT CYLINDERCRANKSHAFTPISTON
CrankshaftCon rod Combination
Conrod big end 1.0(Inside diameter) code
The code is printed on the conrad1.0code (1 or 2)
Conrod big end 1.0Standard: Code "1" 29.02529.034 mm (1.1427 -1.1430 in) Code "2" 29.01629.025 mm (1.1424 -1.1427 in)
Crankpin 0.0(Outside diameter)
The codes are printed on the bottom of the crankshaft middle web
2nd crankp in .0 code (1 or 2)