Suzuki DF70A Service Manual page 13

Break-In Procedures
The first 10 hours are critically important to ensure
correct running of either a brand new motor or a motor
that has been reconditioned or rebuilt. How the motor is
operated during this time will have direct bearing on its
life span and long-term durability.
Break-in period
10 hours
Warm-up recommendation
Allow sufficient idling time (more than 5 minutes) for the
engine to warm up after cold engine starting.
Throttle recommendation
NOTE
Avoid maintaining a constant engine speed
for an extended period at any time during the
engine break-in period by varying the throttle
position occasionally.
First 2 hours
For the first 15 minutes, operate the engine in-gear at
idling speed. During the remaining 1 hour and 45
minutes, operate the engine in-gear at less than 1/2
(half) throttle (3 000 r/min).
NOTE
The throttle may be briefly opened beyond
the recommended setting to plane the boat,
but must be reduced to the recommended
setting immediately after planning.
Next 1 hour
Operate the engine in-gear at less than 3/4 (three -
quarter) throttle (4 000 r/min).
Last 7 hours
Operate the engine in-gear at a desired engine speed.
However, do not operate continuously at full throttle for
more than 5 minutes.
Propeller Selection Guide
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An outboard motor is designed to develop its rated
power within a specified engine speed range. The
maximum rated power delivered by the DF70 / 80 / 90
models are shown below.
Recommended full throttle speed range
CAUTION
Installing a propeller with pitch either too
high or too low will cause incorrect maximum
engine speed, which may result in severe
damage to the motor.
If the standard propeller fails to meet the above
requirement, use another pitch propeller to hold the
engine speed within the range specified above.
Propeller size chart
General Information:
DF70 5 000 – 6 000 r/min
DF80 5 000 – 6 000 r/min
DF90 5 500 – 6 300 r/min
Blade x Dia. (in.) x Pitch (in.)
3 x 14 x 13
3 x 13 and 7/8 x 15
3 x 13 and 3/4 x 17
3 x 13 and 3/4 x 19
3 x 13 and 3/4 x 21
3 x 13 and 3/4 x 23
3 x 13 and 1/2 x 15
3 x 14 x 17
3 x 14 x 19
3 x 14 x 21
3 x 14 x 23
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