Tohatsu M30H Specifications
| Engine Model: Tohatsu M30H |
| Engine Type: 2-stroke 2-cylinder gasoline outboard engine |
| Total Displacement: 26.1 cu.in (429 cc) |
| Rated Engine Power: 30 Hp (22.1 kW) at 5500 rpm |
| Fuel System: Carburetor |
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The Tohatsu M30H is a two-cylinder,
loop-charged two-stroke outboard delivering 30 horsepower. Offered in
several configurations - including manual start with tiller (MF),
electric start with tiller (EF), and electric start with remote control
(EP) - this engine is engineered for reliability and ease of operation.
It has earned a reputation among commercial fishermen and recreational
boaters worldwide for its incredible power relative to its manageable
weight and its unprecedented reliability. The design focuses on
simplicity and proven two-stroke technology, making it a robust and
trusted choice for a variety of on-water activities.
The Tohatsu M30H represents a well-engineered and dependable outboard
option. Its two-cylinder design provides smooth operation with good fuel
economy, a direct benefit of its loop-charged induction system. The CD
ignition system ensures quick and reliable starts in various conditions.
The engine is built with corrosion-resistant materials, including
high-grade marine aluminum alloy and zinc-coated internal water
passages, enhancing its longevity, especially in saltwater environments.
A standard 12V, 80W alternator on electric start models provides power
for essential electronics. Essential safety features like a safety
lanyard and start-in-gear protection are standard across all models.
Engine Model: Tohatsu M30H MF, EF, EP.
Engine Type: 2-Stroke.
Number of Cylinders: 2.
Bore x Stroke: 68 mm x 59 mm (2.68 in x 2.32 in).
Piston Displacement: 429 cc (26.16 cu in).
Power Output: 22.1 kW (30 HP).
Full Throttle Operating Range: 5150-5850 r/min.
Idle Speed in Neutral Gear: 950 r/min.
Minimum Trolling Speed in Forward Gear: 800 r/min.
Exhaust System: Through-hub exhaust.
Cooling System: Water cooling with thermostat control.
Lubrication System: Gasoline oil mixed type (Pre-mixed fuel).
Starting System: Manual (MF model) / Electric starter motor (EF, EP
models).
Ignition System: Flywheel Magneto CDI (Capacitor Discharge Ignition).
Spark Plugs: NGK B7HS-10 or BR7HS-10.
Spark Plug Gap: 0.9-1.0 mm (0.035-0.039 in).
Alternator: 12V, 80W, 6.7A (Standard on Electric Start Models).
Steering (MF, EF): Tiller Handle.
Steering (EP): Remote Control.
Steering Angle: 80 degrees.
Trim System: Manual trim and tilt.
Trim Angle: -9.5 to 15.5 degrees.
Trim Position: 6.
Tilt Up Angle: 58 degrees.
Gear Shift: Dog clutch (F-N-R).
Gear Reduction Ratio: 1.92 (12:23).
Fuel: Unleaded Regular Gasoline with an anti-knock index (R+M/2) of 87
or higher, or a Research Octane Number (RON) of 91 or higher.
Fuel Tank Capacity: 25 L (6.6 US gal) Separate fuel tank.
Engine Oil: Genuine motor oil or recommended one (TCW-III).
Fuel-to-Engine Oil Mixing Ratio: 50:1.
Gear Oil: API GL-5, SAE 80-90.
Gear Oil Capacity: 0.36 L (0.38 qt).
The M30H features a loop-charged, two-cylinder powerhead. Loop charging
is a highly efficient scavenging method that directs the fuel-air
mixture in a loop to push out exhaust gases, resulting in smoother
operation and improved fuel economy compared to older cross-flow
designs.
The engine utilizes a CD ignition system for quick and reliable starts.
It is built with a high-grade marine aluminum alloy for the block and
other components, providing excellent corrosion resistance and
durability while keeping weight low. Internal water passages receive a
zinc coating for superior corrosion resistance.
The fuel system is carbureted and designed to run on standard 87-octane
unleaded gasoline. A separate 25-liter fuel tank is provided with the
outboard.
The lubrication system requires fuel pre-mixed at a 50:1 ratio with
TCW-III certified two-stroke outboard oil. The engine does not feature
an automixing oil injection system.
Cooling is managed by a forced water system that is thermostatically
controlled to maintain a consistent engine temperature for optimal
performance and longevity. The system features a water pump with a
durable stainless steel housing for outstanding reliability.
| Mid Section and Lower Unit |
The M30H is fitted with a durable mid section and lower unit housing a
forward-neutral-reverse dog clutch. The gear reduction ratio is 1.92:1
(12:23). The recommended gear oil is an API GL-5, SAE 80-90 grade, with
a total capacity of 0.36 liters.
The lower unit is equipped with a replaceable trim tab, which also
serves as a sacrificial anode for corrosion protection. The through-hub
exhaust system contributes to quieter operation.
The M30H features a manual trim and tilt system. This system allows the
operator to adjust the motor's angle through six trim positions, ranging
from -9.5 to 15.5 degrees, for optimal boat performance. The motor can
be tilted up to 58 degrees for beaching, launching, or trailering. A
shallow water drive feature is also standard.
The recommended propeller selection range for the M30H is from 8 to 14
inches of pitch. The correct propeller must be selected so that the
engine operates within its wide-open throttle (WOT) range of 5150-5850
r/min under a normal load for optimal performance and engine longevity.
A propeller table is available in the owner's manual to aid in
selection. The standard propeller is made of aluminum.
Overall Length (MF, EF): 884 mm (34.8 in)
Overall Length (EP): 600 mm (23.6 in)
Overall Width (MF, EF): 430 mm (16.9 in)
Overall Width (EP): 373 mm (14.7 in)
Overall Height (Short Shaft): 1124 mm (44.3 in)
Overall Height (Long Shaft): 1251 mm (49.3 in)
Overall Height (Ultra Long Shaft): 1378 mm (54.3 in)
Transom Height (Short Shaft): 435 mm (17.1 in)
Transom Height (Long Shaft): 562 mm (22.1 in)
Transom Height (Ultra Long Shaft): 689 mm (27.1 in)
Weight (MF Short Shaft): 51 kg (112 lb)
Weight (EF Short Shaft): 55 kg (121 lb)
Weight (EP Short Shaft): 54 kg (119 lb)
Weight (MF Long Shaft): 51.5 kg (116 lb)
Weight (EF Long Shaft): 56.5 kg (125 lb)
Weight (EP Long Shaft): 55.5 kg (122 lb)
Weight (MF Ultra Long Shaft): 54 kg (119 lb)
First 20 Hours / 1 Month: Initial dealer inspection. Every 50 Hours / 3
Months: Check and clean the fuel filter. Inspect spark plugs, clean or
replace as needed, and adjust gap to 0.9-1.0 mm (0.035-0.039 in). Check
and re-tighten all accessible bolts and nuts. Apply grease to all
sliding and rotating parts and grease nipples.
Every 100 Hours / 6 Months: Change gear oil, inspecting for water or
metal particles. Have a dealer check carburetor adjustment and ignition
timing. Inspect the water pump impeller for wear. Annually / Every 100
Hours: Replace the water pump impeller regardless of apparent condition.
Gear Oil Plug: 4 Nm (3 lb-ft)
Propeller Nut: 25 Nm (18 lb-ft)
Spark Plug: 27 Nm (20 lb-ft)
Fishing Boats: A top choice for small aluminum tiller-steered boats, jon
boats, and lightweight center consoles, favored by commercial fishermen
worldwide. Utility Boats: Well-suited for skiffs, inflatables, and other
light commercial or recreational utility craft used in sheltered waters.
It is used by organizations like the DLRG (German Lifesaving
Association) with rigid inflatable boats for rescue operations.
Auxiliary Power: Can serve as reliable auxiliary power for larger
sailing yachts.
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