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Owner’s Manual

TOB-120,TOB-300

Adjustments

Carburetor

IMPORTANT: To prevent damage to carburetor, have idle
adjustment performed by an trained professional. Tanaka
company recommends that you take your unit to your Tanaka
dealer when these adjustment are necessary.
Model 120
Carburetor has a fixed high speed jet screw which is preset at
factory and does not need adjustment.
Model 300
Carburetor is preset at the factory, however, due to weather
changes or after extended use it may require idle adjustment.
WARNING: Accurate carburetor adjustment must be made with
motor running. The propeller will spin during carburetor
adjustment. Stay clear of propeller at all times and observe all
safety instructions.

To adjust carburetor, start motor using proper starting procedures, and allow unit to run a few minutes to
reach operating temperature. Move Twist Throttle Grip handle all the way off, to idle position. Turn IDLE
adjustment screw clockwise to increase motor speed, counter-clockwise to decrease motor speed. When idle
speed is properly set, propeller should not rotate and motor will continue to run.
Model 300 incorporates an automatic duel clutch design which allows the propeller to rotate very slowly or
stop completely when motor is idling. A sub clutch engages at slow speeds and the main clutch engages at
approximately 6 MPH.
Model 120 utilized a direct drive system.

Storage

Your authorized Tanaka Dealer is trained and
equipped to service your unit. A periodic checkup
by your dealer will help reduce your maintenance
costs.
If Tanaka 2-cycle oil is not used, we recommend
stabilization of the fuel with an anti-oxident fuel
stabilizer, such as Sta-Bil", a product of Gold Eagle
Co. Follow directions on the product label.
Otherwise the fuel should be drained before
storage. Run motor out of fuel as described in
Operation Section.
Drain gear housing and refill with new lubricant to
remove moisture and prevent possible corrosion of
internal parts. To drain, remove propeller and shear
pin. Remove gear housing cover. Drain grease,
reinstall cover and refill with grease as described
under Lubrication and Maintenance.
Store unit in an upright position on a sturdy stand.
Pull recoil starter rope until a slight resistance is felt
then slowly release rope. At this point, the piston is
covering intake an exhaust ports of the chamber.
Clean unit thoroughly. Touch up all areas to
prevent rust.
Inspect unit for visible signs of wear, breakage or
damage. Order any parts required and make
necessary repairs to avoid delays when beginning
use again.
Cover unit and store it in a dry moisture free area.