Crankshaft Dimensions; Spark Plug Gap; Gearcase; Gear Ratio - TOHATSU NB-1000 Service Manual

SECTION 2

Crankshaft Dimensions

1
Dimension
2.5, 3.5 ..................1.417 ± 0.002 in [36 ± 0.05 mm]
5.............................1.575 ± 0.002 in [40 ± 0.05 mm]
8, 9.8......................1.654 ± 0.002 in [42 ± 0.05 mm]
9.9, 15, 18................1.890 ± 0.004 in [48 ± 0.1 mm]
25, 30......................2.047 + 0
40..........................2.071 + 0
2
Dimension
2.5, 3.5................................................................... N/A
5............................................................................. N/A
8, 9.8......................... 0.984 ± 0.002 in [25 ± 0.05 mm]
9.9, 15, 18................. 1.299 ± 0.002 in [33 ± 0.05 mm]
25, 30........................ 1.496 ± 0.002 in [38 ± 0.05 mm]
40........................... 1.591 ± 0.002 in [40.4 ± 0.05 mm]

Gearcase

Gear Ratio

2.5, 3.5.............................................................. 13 : 24
5........................................................................ 13 : 28
8, 9.8................................................................. 13 : 27
9.9, 15, 18......................................................... 13 : 24
25, 30................................................................ 12 : 23
40...................................................................... 13 : 25
Lubricant ................................ Genuine manufacturer
gear oil or API GL5, SAE #80 - #90
Capacity
2.5A, 3.5A .....................Approx. 3.0 U.S. fl oz [90 mL]
3.5B ............................Approx. 6.1 U.S. fl oz [180 mL]
5..................................Approx. 6.6 U.S. fl oz [195 mL]
8, 9.8.........................Approx. 10.8 U.S. fl oz [320 mL]
9.9, 15, 18.................Approx. 12.5 U.S. fl oz [370 mL]
25, 30..........................Approx. 9.5 U.S. fl oz [280 mL]
40..............................Approx. 14.2 U.S. fl oz [420 mL]
2-18
in [52 + 0 mm]
- 0.001 - 0.02
in [52.6 + 0 mm]
- 0.002 - 0.05
Clutch System
2.5, 3.5A........................ None (Forward gear only)
3.5B.............................................. Dog clutch type
5, 8, 9.8, 9.9, 15, 18, 25, 30, 40 ........... Dog clutch

Electrical System

Ignition Type............. Flywheel magneto capacitor
T1044
Ignition Timing
See Ignition Timing Adjustment in Section 2
Spark Plug (with resistor)
2.5, 3.5 .................................. NGK BPR6HS-10 or
5, 8, 9.8 .................................. NGK BPR7HS-10or
9.9, 15, 18, 25, 30, 40 ............. NGK BR7HS-10 or

Spark Plug Gap

AII Models ............. 0.035 - 0.039 in [0.9 - 1.0 mm]
Battery
2.5, 3.5 .......................................................... None
5 .........................None (Optional - 12V 30 - 35 AH
8, 9.8 ......................... None (Optional - 12V 40 AH
9.9, 15, 18 ................. None (Optional - 12V 40 AH
25, 30 ........................ None (Optional - 12V 40 AH
40 .............................. None (Optional - 12V 70 AH
Engine Fuse
2.5, 3.5 .......................................................... None
5 ................................None (With Optional Battery
8, 9.8 .........................None (With Optional Battery
9.9, 15, 18 .................None (With Optional Battery
25, 30, 40 ..................None (With Optional Battery
(Forward gear and Neutral only)
type (Forward-Neutral-Reverse)
discharge
Champion RL87YC10
Champion RL82YC10
Champion RL82C10
recommended)
recommended)
recommended)
recommended)
recommended)
Charger - 10A)
Charger or Starter - 15A)
Charger or Starter - 15A)
Charger or Starter - 15A)
1-/ 2-Cylinder