Engine Specificati0Ns; Powerhead; Full Throttle Rpm Range; Test Propeller - TOHATSU NB-1000 Service Manual

ENGINE SPECIFICATI0NS

Operation
Power
2.5 .................................................. 2.5 HP [1.8 kW]
3.5 .................................................. 3.5 HP [2.6 kW]
5 ........................................................ 5 HP [3.7 kW]
8 ........................................................ 8 HP [5.9 kW]
9.8 .................................................. 9.8 HP [7.2 kW]
9.9 .................................................. 9.9 HP [7.3 kW]
15 .................................................. 15 HP [11.0 kW]
18 .................................................. 18 HP [13.2 kW]
25 .................................................. 25 HP [18.4 kW]
30 .................................................. 30 HP [22.1 kW]
40 .................................................. 40 HP [29.4 kW]

Full Throttle RPM Range

2.5 ........................................................3800 - 5200
3.5A / 3.5B .........................................4200 - 5300
2 2
5 ...........................................................4500 - 5500
8 ...........................................................4500 - 5500
9.8 ........................................................5000 - 6000
9.9 ........................................................4500 - 5300
15, 18 ...................................................5200 - 5800
25 .........................................................5000 - 6000
30 .........................................................5150 - 5850
40 .........................................................5200 - 5800
Idle RPM
2.5, 3.5A ............................... 1100
2
3.5B ...................................... 1100
2
5 .............................................. 850
8, 9.8 ....................................... 750
9.9, 15, 18 ............................... 800
25, 30 ...................................... 900
40 ............................................ 850
Fuel Consumption at Full Throttle
2.5 ............................................. 0.37 g/hr [1.4 L/hr]
3.5 ............................................. 0.45 g/hr [1.7 L/hr]
5 ................................................ 0.66 g/hr [2.5 L/hr]
8 .................................................. 1.0 g/hr [4.3 L/hr]
9.8 ............................................. 1.35 g/hr [5.1 L/hr]
9.9 ............................................. 1.45 g/hr [5.5 L/hr]
15 .............................................. 1.93 g/hr [7.3 L/hr]
18 .............................................. 2.25 g/hr [8.5 L/hr]
25 ............................................ 3.30 g/hr [12.5 L/hr]
30 ............................................... 3.96 g/hr [15 L/hr]
40 ............................................... 4.49 g/hr [17 L/hr]
1-/ 2-Cylinder
GENERAL SERVICE INFORMATION
lN
GEAR NEUTRAL
—
1300
1000
950
950
1050
1000

Test Propeller

2.5, 3.5A ............................................ 309-64111-0
2
3.5B ................................................... 3F0-64111-0
2
5 ......................................................... 369-64111-0
8, 9.8 .................................................. 3B2-64111-0
9.9, 15, 18 .......................................... 362-64111-0
25, 30 ................................................. 364-64111-5
40 ....................................................... 348-64111-0

Powerhead

Number of Cylinders
2.5, 3.5, 5 .............................................................. 1
8, 9.8, 9.9, 15, 18, 25, 30, 40 ................................ 2
Displacement
2.5, 3.5 .....................................4.6 cu. in [74.6 cm
5 ..............................................6.22 cu. in [102 cm
8, 9.8 .......................................10.3 cu. in [169 cm
9.9, 15 ...................................15.07 cu. in [247 cm
18 ..........................................17.94 cu. in [294 cm
25, 30 ....................................26.18 cu. in [429 cm
40 ..........................................30.08 cu. in [493 cm
Standard Bore
2.5, 3.5 ........................................... 1.85 in [47 mm]
5 ..................................................... 2.17 in [55 mm]
8, 9.8 .............................................. 1.97 in [50 mm]
9.9, 15 ............................................ 2.17 in [55 mm]
18 ................................................... 2.36 in [60 mm]
25, 30 ............................................. 2.68 in [68 mm]
40 ................................................... 2.76 in [70 mm]
Stroke
2.5, 3.5 ........................................... 1.69 in [43 mm]
5, 8, 9.8 .......................................... 1.69 in [43 mm]
9.9, 15, 18 ...................................... 2.05 in [52 mm]
25, 30 ........................................... 2.323 in [59 mm]
40 ................................................. 2.520 in [64 mm]
Piston Clearance
2.5, 3.5 ............0.0024 - 0.0035 in [0.06 - 0.09 mm]
5 ..........................0.008 - 0.020 in [0.02 - 0.05 mm]
8, 9.8 ...................0.008 - 0.020 in [0.02 - 0.05 mm]
9.9, 15, 18 .......0.0020 - 0.0035 in [0.05 - 0.09 mm]
25, 30 ..............0.0024 - 0.0039 in [0.06 - 0.10 mm]
40 ....................0.0020 - 0.0039 in [0.05 - 0.10 mm]
Piston Ring End Gap
2.5, 3.5, 5, 8, 9.8 ............................ 0.007 - 0.013 in
9.9, 15, 18 ...........0.008 - 0.019 in [0.20 - 0.40 mm]
25, 30 ..................0.013 - 0.019 in [0.33 - 0.48 mm]
40 ........................0.008 - 0.016 in [0.20 - 0.40 mm]
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3
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3
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3
[0.18 - 0.33 mm]
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