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Tohatsu M30A3 2-Stroke Specifications
The Tohatsu M30A3 is a two-stroke two-cylinder gasoline outboard engine. This engine has a carburetor fuel system, forced water cooling with thermostat, and flywheel magneto CDI ignition system. A 26.2 cu.in (429 cc) outboard motor has a cylinder bore of 2.68" (68 mm), piston stroke of 2.32" (59 mm), and maximum power of 30 hp (22 kW) at 4800-5500 rpm. The boat motor is equipped with a dog clutch shifting, manual starting system, 3-blades aluminum standard propeller, manual trim and tilt, and tiller handle steering system. The fuel tank has a capacity of 6.3 gal (24 liters).
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| General Technical Data |
Engine Model ................ Tohatsu M30A3
Engine Type ................ 2-stroke two-cylinder gasoline outboard engine
Number of Cylinders ................ 2
Displacement, cu.in (cc) ................ 26.2 (429)
Cylinder Bore, in (mm) ................ 2.68 (68.0)
Piston Stroke, in (mm) ................ 2.32 (59.0)
Maximum Engine Power, hp (kW) ................ 30.0 (22.0)
Maximum Engine Speed, rpm ................ 4800-5500
Idle Speed, rpm ................ 850
Trolling Speed, rpm ................ 700
Lubrication System ................ Engine oil and gasoline mixture
Exhaust System ................ Through hub exhaust
Cooling System ................ Water cooling with thermostat
Ignition System ................ Flywheel magneto CDI
Starting System ................ Recoil starter
| Dimensions and Weight |
Overall Length, in (mm) ................ 32.5 (825)
Overall Width, in (mm) ................ 15.8 (400)
Overall Height (Short Shaft), in (mm) ................ 43.9 (1115)
Overall Height (Long Shaft), in (mm) ................ 48.9 (1245)
Overall Height (Extra Long Shaft), in (mm) ................ 53.9 (1370)
Transom Height (Short Shaft), in (mm) ................ 17 (435)
Transom Height (Long Shaft), in (mm) ................ 22 (560)
Transom Height (Extra Long Shaft), in (mm) ................ 27 (685)
Outboard Weight (Short Shaft), lbs (kg) ................ 105.7 (48.0)
Outboard Weight (Long Shaft), lbs (kg) ................ 108.0 (49.0)
| Fuel System |
Fuel System Type ................ Carburetor
Carburetor Model ................ Keihin Seiki
Carburetor Type ................ Horizontal, butterfly valve
Fuel Type ................ Unleaded gasoline (87 or 91 octane minimum)
Fuel Tank Capacity, gal (L) ................ 6.3 (24.0)
| Gear Housing |
Shift System ................ Dog clutch
Gear Shift ................ F-N-R
Gear Ratio ................ 1.92:1
Gear Oil Capacity, qts (L) ................ 0.38 (0.36)
| Mid Section |
Trim System ................ Manual Trim and Tilt
Tilt Position ................ 6
Transom Height (Short Shaft), in (mm) ................ 17 (435)
Transom Height (Long Shaft), in (mm) ................ 22 (560)
Transom Height (Extra Long Shaft), in (mm) ................ 27 (685)
Steering System ................ Tiller handle
Steering Angle, deg ................ 80
Tilt Angle (Max), deg ................ 75
| Propeller Information |
Diameter, in (mm) ................ 9.8 (250), 9.9 (252)
Pitch, in (mm) ................ 10.2 (260), 11.3 (288), 13.1 (331)
Number Of Blade ................ 3
Material ................ Aluminum
| Maintenance Data |
Engine Fuel Type ................ Unleaded 87 or 91 octane minimum
Engine Oil Type ................ Genuine motor oil or recommended one (TCW-3)
Engine Oil and Fuel Ratio ................ Unleaded Gasoline 50. Genuine 2-stroke Engine Oil 1
Gear Lubricant Type ................ Genuine Gear Oil or API GL5, SAE 80, SAE 90
Gearcase Capacity, qts (L) ................ 0.38 (0.36)
Ignition Timing, degrees ................ 25 BTDC
Spark Plug Type ................ NGK B7HS-10 or BR7HS-10
Spark Plug Gap, in (mm) ................ 0.035-0.039 (0.9-1.0)
| Service Data |
Cylinder Bore Inside Diameter, in (mm) ................ 2.677-2.678 (68.00-68.02)
Piston to Cylinder Clearance, in (mm) ................ 0.0024-0.0039 (0.06-0.10)
Piston Skirt Diameter, in (mm) ................ 2.674-2.675 (67.92-67.95)
Piston to Piston Pin Clearance, in (mm) ................ 0.0002-0.0005 (0.005-0.013)
Piston Pin Bore Inside Diameter, in (mm) ................ 0.6693-0.6695 (17.001-17.007)
Top Ring Width, in (mm) ................ 0.080-0.081 (2.04-2.06)
Second Ring Width, in (mm) ................ 0.079-0.080 (2.01-2.03)
| Service Intervals |
Check Spark Plug ................ Every 50 hours
Check Fuel Line ................ Every 50 hours
Check Anodes ................ Every 50 hours
Check Gear Oil ................ Every 50 hours
Check Propeller ................ Every 50 hours
Check Starter Rope ................ Every 50 hours
Clean Fuel Tank ................ Every 100 hours
Check Cooling System ................ Every 100 hours
Check Water Pump ................ Every 100 hours
Check Carburetor ................ Every 100 hours
Ajust Ignition Timing ................ Every 100 hours
Change Gear Oil ................ Every 200 hours
Replace Spark Plug ................ Every 200 hours
Replace Water Pump Impeller ................ Every 200 hours
| Tightening Torques |
Cylinder head bolt, Nm (lb-ft) ................ 25 (19.0)
Magneto nut, Nm (lb-ft) ................ 137 (101.0)
Crankcase bolt, Nm (lb-ft) ................ 25 (19.0)
Bracket nut, Nm (lb-ft) ................ 98 (72.0)
Starter bracket bolt, Nm (lb-ft) ................ 25 (19.0)
Reverse lock arm shaft, Nm (lb-ft) ................ 6.3 (4.6)
Reverse lock lever shaft, Nm (lb-ft) ................ 6.3 (4.6)
Bevel gear nut, Nm (lb-ft) ................ 25 (19.0)
Shift lever nut, Nm (lb-ft) ................ 29 (22.0)
Spark plug, Nm (lb-ft) ................ 27 (20.0)
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| Engines Technical Specifications |