GENERAL INFORMATION 1-13
CRANKSHAFT/CONROD
ELECTRICAL
LOWER UNIT
Preliminary gear shim & thrust washer
Initial selection-shim adjustment may be required.
Item Unit
Data
DF2.5
Conrod small end
inside diameter
STD mm (in) 12.006 – 12.014 (0.4727 – 0.4730)
Limit mm (in) 12.040 (0.4740)
Conrod big end
oil clearance
STD mm (in) 0.015 – 0.035 (0.0006 – 0.0014)
Limit mm (in) 0.080 (0.0031)
Conrod big end
inside diameter
STD mm (in) 19.015 – 19.025 (0.7486 – 0.7490)
Crank pin out-
side diameter
STD mm (in) 18.990 – 19.000 (0.7476 – 0.7480)
Crank pin out-
side diameter
difference
(out-of-round
and taper)
Limit mm (in) 0.010 (0.0004)
Conrod big end
side clearance
STD mm (in) 0.20 – 0.70 (0.008 – 0.028)
Limit mm (in) 1.00 (0.039)
Conrod big end
width
STD mm (in) 17.50 – 17.80 (0.689 – 0.701)
Crank pin width STD mm (in) 18.00 – 18.20 (0.709 – 0.717)
Crankshaft
runout
Limit mm (in) 0.05 (0.002)
Ignition timing Degrees BTDC 30
Ignition coil
resistance
Primary Ω at 20 °C 0.5 – 0.9
Sec-
ondary
kΩ at 20 °C 10 – 16
Spark plug cap resistance kΩ at 20 °C 4 – 6
Standard spark
plug
Type NGK CR6HSA
Gap mm (in) 0.6 – 0.7 (0.024 – 0.028)
Pinion gear backup shim mm (in) 2.0 (0.08)
Forward gear backup
shim
mm (in) 0.5 (0.02)
Propeller shaft reverse
thrust washer
mm (in) 1.8 (0.07)
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