Breaking In (Running In) Engine - Yamaha 25A Owner's Manual

EMF50211
BREAKING IN (RUNNING IN)
Your new engine requires a period of
break-in (running-in) to allow mating sur-
faces of moving parts to wear-in evenly.
Correct break-in (running-in) will help
ensure proper performance and longer
engine life.
cC
8 Failure to follow the break-in (running-
in) procedure may result in reduced
engine life or even severe engine dam-
age.
8 Premix fuel must be used during break-
in (running-in) in addition to oil in the
Precision Blend System.
Break-in (running-in) time:
10 hours
Break-in (running-in) premix ratio (for
Pre-mix model):
Gasoline (Petrol) : Engine oil=25 : 1
Refer to "Gasoline/Petrol and Oil
Mixing".
Break-in (running-in) premix ratio (for
Precision Blend System model)
Gasoline (Petrol) : Engine oil=50 : 1
Mixing ratio
Gasoline (Petrol)
(0.26 US gal, (3.2 US gal, (3.7 US gal, (6.3 US gal,
0.22 Imp gal) 2.6 Imp gal) 3.1 Imp gal) 5.3 Imp gal)
Engine oil
(0.02 US qt, (0.25 US qt, (0.30 US qt, (0.51 US qt,
0.02 Imp qt) 0.21 Imp qt) 0.25 Imp qt) 0.42 Imp qt)
3-13
ENGINE
50 : 1
1 L 12 L 14 L
0.02 L 0.24 L 0.28 L
E
24 L
0.48 L