Maintenance Specifications; Lower Unit - Yamaha 20C Manual De Servicio

SPEC
Item
Crankshaft
Crank width
D
A
Crankpin diameter
Runout limit
Big end side clearance (E)
Maximum small end axial play (F)
Thermostat
Opening temperature
Fully open temperature
Valve open lower limit
Carburetor
ID mark
Float height
Valve seat size
Main jet
Main nozzle
Pilot jet
Pilot air jet
Pilot screw
Manual starter
Starter rope length

LOWER UNIT

Item
Gear backlash
Pinion forward
Pinion reverse
Pinion shims
Forward shims
Reverse shims

MAINTENANCE SPECIFICATIONS

Unit
F
(A) mm (in)
E
D
(B) mm (in)
B
mm (in)
(D) mm (in)
mm (in)
mm (in)
°C (°F)
°C (°F)
mm (in)
mm (in)
mm (in)
(M.J.)
(M.N.) mm (in)
(P.J.)
(P.A.J.)
(P.S.) turns out
mm (in)
Unit
mm (in)
mm (in)
mm
mm
mm
53.90–53.95 (2.1220–2.1240)
34.88–35.10 (1.37–1.38)
21.995–22.000 (0.8659–0.8700)
0.03 (0.0012)
0.200–0.700 (0.0079–0.0276)
58.0–62.0 (136.4–143.6)
17.0–19.0 (0.67–0.75)
0.20–0.50 (0.0079–0.0197)
0.70–1.00 (0.0276–0.0394)
0.10, 0.12, 0.15, 0.18, 0.30, 0.40, 0.50
0.10, 0.12, 0.15, 0.18, 0.30, 0.40, 0.50
0.10, 0.12, 0.15, 0.18, 0.30, 0.40, 0.50
2-4
Model
20CMH
2.0 (0.08)
70.0 (158.0)
3.0 (0.12)
6A901
1.4 (0.06)
#133
2.9 (0.11)
#62
#130
1 1/8–1 5/8
2,095 (82.5)
Model
20CMH
E