Oil Recommendation; Mixing Fuel And Oil - Mercury 10/15 Sea Pro/Marathon - 6/8/9.9/10/15 HP User Manual

The adverse effects of alcohol are more severe with methanol and are
worse with increasing content of alcohol.

Oil Recommendation

Recommended Oil
IMPORTANT: Oil must be NMMA certified TC-W3 2-Cycle oil.
Mercury or Quicksilver Premium TC-W3 2-Cycle oil is recommended for
this engine. For added protection and lubrication, Mercury or Quicksilver
Premium Plus TC-W3 2-Cycle oil is recommended. If Mercury or
Quicksilver outboard oil is not available, substitute another brand of 2-cycle
outboard oil that is NMMA Certified TC-W3. Severe engine damage may
result from use of an inferior oil.

Mixing Fuel and Oil

Use a 25:1 (4%) gasoline/oil mixture in the first tank of fuel.
After the break-in fuel mixture is used up, use a 50:1 (2%) gasoline/oil
mixture. Refer to the table (following) for mixing ratios.
GASOLINE/OIL MIXING RATIO CHART
Gas/Oil
Ratio
25:1 (4%)
50:1 (2%)
MIXING PROCEDURE
Pour the full amount of oil along with approximately one gallon of gasoline
into an approved container. Shake the two together until they are
thoroughly mixed. Add the remainder of gasoline and shake container to
ensure mixing.
FUEL & OIL
Mercury or Quicksilver Premium 2-Cycle TC-W3
Outboard Oil
GASOLINE/OIL MIXING RATIO CHART
3.8 liters (1 gal.)
gas
148 ml (5 fl. oz.)
oil
89 ml (3 fl. oz.) oil 237 ml (8 fl. oz.) oil
11.5 liters (3 gal.)
gas
473 ml (16 fl. oz.)
oil
37
23 liters (6 gal.)
gas
946 ml (32 fl. oz.)
oil
473 ml (16 fl. oz.)
oil