Yamaha C40A Owner's Manual page 39

cC
8 Avoid using any oil other than the des-
ignated type.
8 Use a thoroughly blended fuel-oil mix-
ture.
8 If the mixture is not thoroughly blend-
ed, or if the mixing ratio is incorrect,
the following problems could occur:
Low oil ratio: Lack of oil could cause
major engine trouble, such as piston
seizure.
High oil ratio: Too much oil could cause
fouled spark plugs, smoky exhaust, and
heavy carbon deposits.
Mixing ratio
1 L
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)
0.04 L
Engine oil
(0.04 US qt, (0.51 US qt, (0.59 US qt, (1.01 US qt,
0.04 Imp qt) 0.42 Imp qt) 0.49 Imp qt) 0.84 Imp qt)
Mixing ratio
1 L
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, (0.26 US qt, (0.30 US qt, (0.51 US qt,
0.02 Imp qt) 0.21 Imp qt) 0.24 Imp qt) 0.42 Imp qt)
NOTE:
If using a permanently installed tank, pour
the oil gradually as the fuel is being
added to the tank.
3-6
E
25 : 1
12 L 14 L 24 L
0.48 L 0.56 L 0.96 L
50 : 1
12 L 14 L 24 L
0.24 L 0.28 L 0.48 L