Mercury 250 Specifications download pdf (Page 42)

FUEL AND 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.

Fuel Requirements for Engine Break‑in

Do not use pre‑mixed gas and oil during break‑in. The engine

automatically receives extra oil during engine break‑in. Use a fresh

supply of the recommended gasoline during engine break‑in and

after engine break‑in.

Avoiding Fuel Flow Restriction

IMPORTANT: Adding components to the fuel supply system

(filters, valves, fittings, etc.) may restrict the fuel flow. This may

cause engine stalling at low speed, and/or a lean fuel condition at

high RPM that could cause engine damage.

Low Permeation Fuel Hose Requirement

Required for outboards manufactured for sale, sold, or offered for

sale in the United States.

• The Environmental Protection Agency (EPA) requires that any

outboard manufactured after January 1, 2009 must use low

permeation fuel hose for the primary fuel hose connecting the

fuel tank to the outboard.

• Low permeation hose is USCG Type B1‑15 or Type A1‑15,

defined as not exceeding 15/gm²/24 h with CE 10 fuel at

23 °C as specified in SAE J 1527 ‑ marine fuel hose.

Filling Remote Oil Tank

Remove filler cap and fill with the specified oil. Oil tank capacity is

11.5 liters (3 gallons). Replace filler cap and tighten securely.

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Mercury 250 Specifications Page 42