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TANAKA OUTBOARDS TOB-120 300 Manual
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Owner Owner Owner Owner Owners Man s Man s Man s Man s Manual ual ual ual ual
Model Numbers:
TOB-120,TOB-300 TOB-120,TOB-300 TOB-120,TOB-300 TOB-120,TOB-300 TOB-120,TOB-300
OUTBO OUTBO OUTBO OUTBO OUTBOARD MO ARD MO ARD MO ARD MO ARD MOTORS ORS ORS ORS ORS
P/N 25153
Date 05-19-01
Supplier To The Outdoor Power Equipment Industry
ISM, Inc. 1028 4
th
Street SW Auburn, WA 98001 Phone: (253) 333-1200 Fax: (253) 333-1212
www.tanakapowerequipment.com custsvc@tanaka-ism.com
TOB-120
TOB-300

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Owners Manual
TOB-120,TOB-300
A Message to Tanaka Customers
Welcome to the world of Tanaka equipment. We are pleased that you have purchased the best equipment
available. The care you give your Tanaka equipment will determine the satisfaction and service life you will
obtain from it. Use this manual as your guide. By observing the instructions and suggestions in this manual,
your Tanaka equipment will serve you well for many years.
Your Tanaka dealer will be happy to supply any service or advice which may be required to keep your Tanaka
equipment operating at peak efficiency. He stocks genuine Tanaka parts and lubricants; manufactured with
the same precision and skill as the original equipment. His factory trained staff is kept well informed on the
best methods of servicing Tanaka equipment and is ready and able to serve you. If service is required, be
prepared to supply the service person with the Model and Serial Number of the equipment, as well as a full
description of the problem encountered.
NOTE: The descriptions and specifications contained in this manual were in effect at the time the manual was
approved for printing. Tanaka Kogyo Co., Ltd. reserves the right to discontinue models without notice and
without incurring obligation. The equipment described within this manual may not be identified as either
standard or optional and the various illustrations may not all be applicable to your particular unit. If you have
questions, always check with your Tanaka dealer.
Safety Alert Symbol And Notations
The following safety notations are used throughout this manual to call attention to special information or
operating procedures. Understand the message in each notation and be alert to unsafe conditions and the
possibility of personal injury.
NOTE: Points out general reference information regarding proper operation and maintenance practices.
IMPORTANT: Statement indicates specific procedures or information that is required to prevent
damage to the machine or its attachments.
This safety alert symbol is used to attract your attention! PERSONAL SAFETY IS INVOLVED!
When you see this symbol - BECOME ALERT - HEED ITS MESSAGE.
CAUTION: Identifies safe operating practices or indicates unsafe conditions that could result in personal
injury.
WARNING: Describes a condition where failure to follow the instructions could result In severe personal
injury.
DANGER: Designates a condition where failure to follow instructions or heed warning will most likely
result In serious personal Injury or death.
WARNING
The engine exhaust from this product
contains chemicals known to the State
of California to cause cancer, birth
defects and other reproductive harm.

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Owners Manual
TOB-120,TOB-300
Instructions contained in this manual apply to models listed on this page. Use the instructions that
apply to your unit.
Models
Model TOB 120 Outboard Motor Model TOB 300 Outboard Motor
Specific Model Number and Serial Number of your equipment are on a label on the unit. Record
numbers below and use them whenever parts or service are required.
Model Number - ____________________________
Serial Number - ____________________________
Engine Serial Number - ____________________________
Safety Precaution - ____________________________
Safety Precautions
Read and understand this Owner’s Manual before operating this unit. Be thoroughly familiar with
controls and proper use of equipment. Know how to stop unit quickly in an emergency.
This Outboard Motor is a quality marine product designed to give years of dependable service when
operated and maintained properly. If rotating propeller comes in contact with your body, it will cause
severe personnel injury. If blade comes in contact with submerged hard objects, it may damage
blade. Be aware of sudden lifting of motor leg and propeller out of the water which may occur if an
underwater object is struck.
Understand and follow each Danger, Warning, Caution and instruction decals installed on equipment
or described in this manual.
Use only replacement parts designed for this unit.
See your Tanaka Dealer for a complete list. Although some unauthorized parts may appear to be
adaptable, their use may be extremely dangerous and could cause serious personal injury. This is
especially true of propellers which may be of poor construction or improperly balanced.
NEVER allow children to operate or play with unit. DO NOT allow adults to operate unit without
proper instructions. Anyone using this unit must understand the information in this manual.
Safe operation of this equipment requires complete and unimpaired attention at all times. DO NOT
operate unit if fatigued, during or after consumption of medication, drugs or alcohol.
When transporting unit in a vehicle, secure it to prevent it from sliding or tipping over which could
cause damage to your unit or spill fuel.

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Owners Manual
TOB-120,TOB-300
Safety Precautions cont.
Preparation
Thoroughly inspect Outboard Motor for damage,
chipped propellers, fuel leaks, etc. before operating
this unit.
NEVER attempt to make any adjustments to unit
while motor is running (except where specifically
recommended).
Gasoline is highly flammable and its vapors are
explosive. Handle with care. Use an approved
(RED) gasoline container.
NEVER allow smoking materials, sparks or flame
(match, pilot light, etc.) near unit or gasoline
container.
Check fuel supply before starting motor. Always
start boating trips with a full tank.
DO NOT fill fuel tank indoors, when motor is
running or while motor is still hot. Wipe off any
spilled gasoline, allow vapors to dissipate and move
fuel container 10 feet (3m) away from unit before
starting motor.
Operation
Keep equipment in good condition. Keep all guards
and shields in place and safety devices operating
properly.
Be sure that Throttle Lever stops motor when
moved to stop position and Lever moves freely. On
units equipped with Stop button, be sure button
stops unit.
Exhaust fumes contain carbon monoxide, an
odorless and deadly gas. DO NOT run motor in
enclosed or poorly ventilated areas.
Before starting, make sure unit is properly secured
to boat transom using clamp stud handles. Be sure
a safety chain, from unit to boat, is installed. Check
clamp handles for tightness periodically.
Always carry a spare propeller, shear pins, hair
pins, spark plug and necessary repair tools such as
pliers, screwdriver, and wrenches.
When starting unit, be sure propeller is clear of all
objects because when motor is started, throttle
may be set high enough to rotate the propeller.
After motor is started and idling smoothly, propeller
must not rotate. DO NOT operate unit if propeller
rotates when motor is idling.
DO NOT put hands or other body parts near
rotating parts.
Maintain a firm hold on the twist grip at all times to
help keep control of the unit.
Operate equipment only when there is good
visibility and light.
Never allow swimmers or waders near unit while it
is in operation. The operator is responsible for the
safety of swimmers and boaters in the area.
After mounting motor on transom, set proper
motor trim according to size and weight of the
boat. See Tilt
Adjustment in Operation section of this manual.
Move Throttle Lever to stop position to stop
propeller. Always keep a fire extinguisher in the
boat along with life vests and other U. S. Coast
Guard approved safety equipment.
Before attempting to make any adjustment,
repairs, inspections or cleaning unit, stop motor,
wait for moving parts to stop, allow unit to cool
then remove wire from spark plug .
If equipment vibrates abnormally during operation,
stop motor at once, wait for moving parts to stop,
and remove wire from spark plug. Abnormal
vibration is a warning of trouble. Repair any
damage before restarting unit. (See your Tanaka
Dealer.)
After striking a submerged object, stop motor, wait
for moving parts to stop, then remove wire from
spark plug. Thoroughly inspect unit for any
damage. Repair damage before restarting and
operating unit.
Before shutting motor off, after operating under full
load for an extended period, lower motor speed
and allow it to idle for a few minutes so that motor
parts can cool evenly.
In the event of an emergency, stop the motor by
moving Choke Lever to full choke position.

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Owners Manual
TOB-120,TOB-300
Safety Precautions cont.
Boating, Trailering and Auxiliary Use Tips
When trailering this unit, secure motor in an upright (vertical) position against boat transom. Do not
trailer with unit tilted up. If unit must be transported while tilted up, place a suitable brace, such as a
2 x 4, between motor bracket and motor leg. Tie down motor leg against brace to prevent damage to
motor leg.
When transporting unit in a vehicle, secure it to prevent turnover which could result in spilled fuel or
damage to unit.
To prevent fuel leakage from the carburetor when unit is tilted, close vent screw on fuel tank, turn
off fuel shut off valve, and allow unit to run at idle until it stops.
Take all possible precautions when leaving unit unattended. Remove and keep wire away from spark
plug to prevent accidental starting or unauthorized use.
When loading boat, distribute weight evenly to prevent tipping. Keep heavy loads low in the boat.
Do not stand up in a small boat. Standing, bow riding, seat back and gunwale riding can be
dangerous.
When loading or launching a boat on a trailer, tilt motor up to prevent propeller from striking ramp or
underwater objects.
An auxiliary adjustable position motor bracket is recommended when using unit as auxiliary power for
watercraft.
Maintenance and Storage
Periodically check that Throttle Lever stops motor when moved to stop position and Lever moves
freely.
Periodically check operation of propeller clutch brake. Propeller should stop almost immediately when
throttle is fully released. DO NOT operate unit if brake does not operate properly. Have unit serviced
by your Tanaka dealer before operating.
Discard propellers that are broken or damaged in any way. Replace only with Tanaka original
equipment replacement parts for safety.
Keep all nuts, bolts and screws tight and be sure equipment is in safe working condition. Check all
hardware at regular intervals.
NEVER store unit with gasoline in tank inside a building where fumes may reach an open flame or
spark. Allow motor to cool before storing in any enclosure.

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Owners Manual
TOB-120,TOB-300
Preparation for Operation
WARNING: Failure to follow all instructions could result in personal injury and/or damage to unit. Remove
wire from spark plug before attempting any adjustment or assembly procedures.
Instructions contained in this manual apply to several models. Use the instructions that apply to your unit.
Fuel Mixture
IMPORTANT: 2-cycle engines require that oil be mixed with fuel. Refer to Fuel in Operation section of this
manual for recommended mixture.
Handle Assembly
Model 120
Place handle (throttle lever up) into position on joint pipe holder with
notch on end of handle against handle stopper. Secure to joint pipe
holder with wing head bolt, lock washer, two plain washers, and Hair
Pin. Attach throttle cable to carburetor bracket.
Model 300
Place handle (throttle cable down) into position on clutch case. Be sure
flat of handle is set in notch of handle stopper. Secure to clutch case
with 8 x 30 bolt, lock washer, and two plain washers. Attach throttle
cable to carburetor.
Gear Housing
Check gear housing for proper level of grease prior to operation. See Lubrication and Maintenance section for
proper procedures.

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Owners Manual
TOB-120,TOB-300

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Owners Manual
TOB-120,TOB-300
Operation
PRE-STARTING
IMPORTANT: 2-cycle engines require that oil be mixed with gasoline (refer to Fuel section below for proper
mixture).
CAUTION:
Make sure all hardware is tight, all safety devices are in place and operating, all adjustments are
made correctly, that Stop Switch on models equipped with them, stops motor and that Throttle
Lever moves freely.
Fuel
IMPORTANT: Failure to mix oil with gasoline will result in seizure and severe damage to motor. DO NOT use
gasohol or gasoline containing alcohol because alcohol will attack and cause internal parts to deteriorate. Use
unleaded gasoline for best performance.
NOTE: To prevent foreign particles from entering tank while filling: wipe dust, dirt and debris from around cap
before removing it.
WARNING:
Gasoline is highly flammable and must be handled with care. Allow motor to cool several
minutes before removing fuel tank cap. Never fill tank when motor is running or hot from
operation. Do not allow open flame, matches, or smoking in area. DO NOT overfill. Wipe up any
spills and allow vapors to dissipate. Use approved (Red) gasoline container.
Tanaka 2-cycle oil has been formulated to insure maximum motor performance and increased motor life.
Premix Tanaka oil per instructions on container. If Tanaka oil is not available, select a quality 2-cycle approved
oil and use unleaded gasoline.
If oil manufacturer does not recommend a specific mixing ratio, mix at a 1 to 50 ratio (2.6 ounces oil per
gallon of unleaded gasoline). Always use branded 89 octane unleaded gasoline.
NOTE: After fuel mixture has been left standing for a prolonged
period of time it will begin to separate, therefore thoroughly shake
mixture before using.
Mounting To Boat
Motor must be mounted in center of boat transom. Recommended
transom height is 20". Clamp to transom with clamp stud handles
turned hand tight. Secure unit to transom using a safety
chain (not supplied).
During operation, occasionally check clamps for tightness. Loose
clamps may result in damage to motor or boat.

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Owners Manual
TOB-120,TOB-300
Tilt Adjustment
Motor tilt must be adjusted to propel boat through the
water with an even keel. If the motor is tilted too far
outward, bow of the boat would ride too high in the water
obscuring the operator’s view and be susceptible to
sudden movement by high winds and waves. If the motor
is tilted too far inward, the bow may dig into high waves
or wakes.
A 12 to 15 degree tilt is recommended. This angle may
need to be adjusted according to the weight of boat and
passengers.
Improper transom height or tilt angle may result in boat
"porpoising" or motor cavitation.
Boat porpoising is a condition where the bow of the boat
raises and falls rapidly and continuously.
Motor cavitation is a condition where turbulent air passes by the propeller resulting in an increase in motor
speed coupled with a rapid drop in boat speed. These conditions can also be caused by fast turns, rough
water, wrong or obstructed propeller, or poor boat design.
To adjust, stop motor and allow propeller to come to a full stop. Tilt motor all the way up to the storage
position, then remove Tilt Lock Bracket Pin. Re-position lock pin in one of five angle adjustment holes in clamp
bracket. Secure Tilt Lock Pin with Hair Pin.
To determine the best motor tilt angle, start with the Tilt Lock Adjustment Pin in the center set of holes. In
calm water, operate boat at full throttle with a normal load. Adjust tilt angle as necessary to establish a near
even keel.
Steering Adjustment
The amount of resistance to movement of the steering
handle is adjustable. Loosen or tighten the steering
tension bolt using an open end spanner wrench
(supplied).
IMPORTANT: The tension bolt may fall out if loosened too
much.

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Owners Manual
TOB-120,TOB-300
STARTING
CAUTION: DO NOT attempt to start motor at this time. Familiarize yourself with controls to
see what they do, how they work and thoroughly read and understand entire Owner’s manual
first.
WARNING: Insure all guards and safety devices are installed and working properly before
starting.
WARNING: Rotating propeller can cause serious Injury. Be sure propeller is clear of
swimmers, waders, or underwater objects because when Throttle is set at starting position
motor speed will be fast enough for clutch to engage and propeller to rotate.
Fuel
When starting motor, open Air Vent Screw on Fuel Filler Cap. Open Fuel Shut Off Valve.
Choke
If starting a cold motor, move Choke Lever to its START (ON) position.
After motor begins to fire, move choke lever to its RUN (OFF) position.
IMPORTANT: Continued over choking while engine is running may
cause spark plug to foul.
Flooding is a condition where motor will not start due to an
overabundance of fuel in crankcase. If flooding occurs, move choke
lever to RUN position, set throttle at half and pull rewind starter
handle until engine starts and continues to run.
Throttle Lever
Model 120
Move Throttle lever to a half open position.
Model 300
Move twist grip handle to half throttle position.
WARNING: Starting motor may Immediately engage propeller
clutch resulting In a sudden movement of the boat. Be sure all
passengers are seated before starting motor.
NOTE: Allow motor to warm up at idle speed for 2 to 3 minutes before
applying load.
WARNING: After motor Is started and Is Idling smoothly,
propeller must not rotate. A rotating propeller can cause severe
personal Injury.
See Adjustment Section for Carburetor Adjustment.
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TANAKA OUTBOARDS TOB-120_300 Manual
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