Stroke Gasoline / Oil Pre Mix - Polaris 340 CLASSIC 2006 Manual

GENERAL
pump, or carburetor. This will cause warm engine drive ability
problems and hard starting when warm. Some states are
limiting the Reid Vapor number to 9.0 PSI year around to help
meet evaporative emissions standards.
Table 2-7: Gasoline Volatility
Maximum Reid
Vapor
CLASS PRESSURE
A 7.0 psi (0.5 bar)
B 9.0 psi (0.6 bar)
C 10.5psi (0.7 bar)
D 12.0psi (0.8 bar)
E 13.5psi (0.9 bar)
Add 2.45_F for each 1000 ft (305m) above sea level

2 STROKE GASOLINE / OIL PRE MIX

To figure out the correct fuel to oil ratio per gallon, you will
need to use different formulas for the ratio that you are
looking for. Example of a fuel/oil ratio of 20:1 is figured out
by taking the gallons of the fuel mixing container (1 gallon)
and converting it to ounces (128 oz.) divided by the ratio that
you are looking for (20), this will give you the amount of oil
that you need (6.4 oz.) to add to the fuel in the mixing
container.
1 gallon has 128oz. / 20 = 6.4 oz. of oil needed to mix to each
1 gallon of gasoline. For a 5 gallon mixture, you would need
add 32 oz. of oil to the gasoline.
Table 2-8:
OZ OF OIL
GALLONS OF NEEDED TO
FUEL ACHIEVE A
20:1 RATIO
1
2
3
4
5
6
2.10
Ambient Air Temp
Range
LOW HIGH
60_F 110F+
(16_C) (43_C+)
50_F 110F
(10_C) (43_C)
40_F
97F (36_C)
(4_C)
30_F
85F (29_C)
(-1_C)
20_F
69F (21_C)
(-7_C)
OZ OF OIL
NEEDED TO
ACHIEVE A
32:1 RATIO
6 4
13 8
19 12
26 16
32 20
38 24