Tohatsu
Marine Oil/Gas Mixture Chart
For
outboards that require a 50:1 premix of oil/gas we've
put together the following chart to simplify the calculations.
Only
use 2-cycle outboard motor oil with a NMMA (National
Marine Manufacturer's Assoc.) certified rating of
TCW3. Never use automobile motor oil! TCWII oil may
be used if TCW3 oil is not available.
Unleaded
gasoline with a minimum octane rating of 87 is necessary,
however, we recommend using an octane rating of 89
if possible for best performance.
The
gas and oil mixture is 50:1 (25:1 during the initial
break-in period).
Since
trying to mix 1.28 ounces of oil for a half gallon
of gas is a little difficult to measure, many people
find it easier to purchase a 6 gallon fuel tank and
mix 1 pint of oil (16 ounces) with the gasoline. Then
use the 6 gallon tank to fill up your individual tank
that you will be using on your boat.
50:1
GAS/OIL MIXTURE
Gas
(US
Gallons) |
Oil
(Ounces) |
Oil
(Pints) |
Gas
(Liters) |
Oil
(Liters) |
| 0.25
|
0.64
|
0.04
|
0.95
|
0.02
|
| 0.37
|
0.95
|
0.06
|
1.40
|
0.03
|
| 0.5 |
1.28
|
0.08
|
1.90
|
0.04
|
| 0.66 |
1.69
|
0.11
|
2.50
|
0.05
|
| 0.75 |
1.92
|
0.12
|
2.84
|
0.06
|
| 1.0 |
2.56
|
0.16
|
3.79
|
0.08
|
| 1.5
|
3.84
|
0.24
|
5.68
|
0.11
|
| 2.0
|
5.12
|
0.32
|
7.58
|
0.15
|
| 3.0
|
7.68
|
0.48
|
11.37
|
0.23
|
| 3.43
|
8.78
|
0.55
|
13.00
|
0.26
|
| 4.0
|
10.24
|
0.64
|
15.16
|
0.30
|
| 5.0
|
12.80
|
0.80
|
18.94
|
0.38
|
| 6.0
|
15.36
|
0.96
|
22.73
|
0.46
|
| 10.0
|
25.60
|
1.60
|
37.89
|
0.76
|
| 15.0
|
38.40
|
2.40
|
56.83
|
1.14
|
| 20.0
|
51.20
|
3.20
|
75.78
|
1.52
|
During
your initial break-in period you should use a 25:1 (double
oil) mixture. See your owner's manual for complete details
or view our Break-In Chart on-line.
25:1
GAS/OIL MIXTURE
Gas
(US
Gallons) |
Oil
(Ounces) |
Oil
(Pints) |
Gas
(Liters) |
Oil
(Liters) |
| 0.25
|
1.28
|
0.08
|
0.95
|
0.04
|
| 0.37
|
1.89
|
0.12
|
1.40
|
0.06
|
| 0.5
|
2.56
|
0.16
|
1.89
|
0.08
|
| 0.66
|
3.38
|
0.21
|
2.50
|
0.10
|
| 0.75
|
3.84
|
0.24
|
2.84
|
0.11
|
| 1.0
|
5.12
|
0.32
|
3.79
|
0.15
|
| 1.5
|
7.68
|
0.48
|
5.68
|
0.23
|
| 2.0
|
10.24
|
0.64
|
7.58
|
0.30
|
| 3.0
|
15.36
|
0.96
|
11.37
|
0.46
|
| 3.43
|
17.56
|
1.10
|
13.00
|
0.52
|
| 4.0
|
20.48
|
1.28
|
15.16
|
0.61
|
| 5.0
|
25.60
|
1.60
|
18.94
|
0.76
|
| 6.0
|
30.72
|
1.92
|
22.73
|
0.91
|
| 10.0
|
51.20
|
3.20
|
37.89
|
1.52
|
| 15.0
|
76.80
|
4.80
|
56.83
|
2.27
|
| 20.0
|
102.40
|
6.40
|
75.78
|
3.03
|
Conversion
Information
128
ounces = 1 gallon 1 ounce = 0.0296 liters
16 ounces = 1 pint 1 gallon = 3.789 liters
2 pints = 1 quart
4 quarts = 1 gallon
Example
of calculation:
GALLONS X 128 (ounces) / RATIO = OUNCES OF OIL TO
MIX WITH GAS
6
gal. X 128 (oz.) / 50 (50:1 ratio) = 15.36 oz. of
oil for 6 gal. of gas
6
gal. X 8 (pints) / 50 (50:1 ratio) = 0.96 pints
of oil for 6 gallons of gas
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