TOHATSU 2 Stroke Cylinder Series, Service Manual

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GENERAL SERVICE INFORMATION
2-27
1-/ 2-Cylinder
BREAK-lN PROCEDURE
CAUTION
Failure to follow the Break-In Procedure in Owner’s
Manual and special fuel mixture requirements for
break-in may lead to serious engine damage and
shortened engine life.
To prevent serious engine damage and ensure long engine life, new
engines, used engines with new powerhead, used engines with newly
rebuilt powerhead, and engines coming out of storage must be run for
a period of 10 hours in accordance with the break-in procedure.
CAUTION
After break-in has been successfully completed fuel
tank should be filled with a 50:1 ratio gas
/ oil premix.
First 10 Minutes (0 - 0.16 Hours)
• Fill the fuel tank with a 25:1 gasoline to oil premix.
• Operatethe engine at minimum idle speed ONLY .
• Verify a steady stream of water from the cooling water check port
and idle port on the engine, indicating the water pump is
functioning properly.
Next 50 Minutes (0.16 to 1 Hour)
• DO NOT operate the engine above 1/2 throttle.
• DO NOT maintain a constant throttle setting. Vary engine speed
from 1/4 to 1/2 throttle every 15 minutes.
NOTE
For boats which come onto plane easily, use full throttle
to quickly accelerate onto plane; then immediately
reduce throttle to 1/2 and maintain this speed.
Next Hour (1 to 2 Hours)
• Use full throttle to quickly accelerate boat onto plane; then
immediately reduce throttle to 3/4 and maintain this speed.
• At intervals, run engine at 3/4 throttle for 1 - 10 minutes; then
return to 1/2 throttle for a cooling period.
• Vary engine speed every 15 minutes.
• Check for water discharge from cooling water check ports.