Breaking In Engine - Yamaha 25C Owner's Manual

EMU01781

BREAKING IN ENGINE

Your new engine requires a period of
break-in to allow mating surfaces of mov-
ing parts to wear in evenly. Correct break-
in will help ensure proper performance
and longer engine life.
cC
8 Failure to follow the break-in procedure
could result in reduced engine life or
even severe engine damage.
8 Premix fuel must be used during break-
in in addition to oil in the oil injection
system.
Break-in time: 10 hours
For premix models
Gasoline to engine oil premix ratio
during break-in: 25:1 For details on
mixing fuel and oil, see "Gasoline
and oil mixing" in this chapter.
For oil injection system models
Gasoline to engine oil premix ratio
during break-in: 50:1
EMU00225
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)
0.02 L
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)
3-12
50 : 1
1 L 12 L 14 L
0.24 L 0.28 L
E
24 L
0.48 L