Yanmar 3YM30 Operations Manual (January 2009)

ENGINE OPERATION

Starting at Low Temperatures

Comply with local environmental requirements. Use engine heaters to avoid starting problems and white smoke.

NOTICE: NEVER use an engine starting aid such as ether. Engine damage will result. Using a starting aid may void the warranty.

To limit white smoke, run the engine at low speed and under moderate load until the engine reaches normal operating temperature. A light load on a cold engine provides better combustion and faster engine warm-up than no load.

Avoid running the engine at idling speed any longer than necessary.

Starting with Air Heater (If

Equipped)

1. Open the seacock (if equipped).

2. Open the fuel tank cock.

3. Put remote control handle in

NEUTRAL.

4. Turn the battery master switch (if equipped) to ON.

5. Turn key switch to GLOW for 15 seconds.

6. Turn key switch to ON. Ensure that the instrument panel indicators light and the alarm sounds. This shows that indicators and alarm are working correctly.

Note: The coolant high temperature alarm indicator and water in sail drive seal indicator should not come on during start-up.

7. Turn key switch to START. Release the key switch when the engine has started. The alarm should stop and the indicators should go out. NOTICE:

NEVER hold the key in the START position for longer than 15 seconds or the starter motor will overheat.

After the Engine has Started

After the engine has started, check the following items at a low engine speed:

1. Check that the gauges, indicators and alarm are normal.

2. Check for any water, fuel, engine coolant or engine oil leaks. If any leaks are found, shut down the engine and perform the necessary repairs.

WARNING! Piercing Hazard. NEVER check for a fuel leak with your hands.

ALWAYS use a piece of wood or cardboard. Have your authorized

Yanmar Marine dealer or distributor repair the damage. Avoid skin contact with the high-pressure diesel fuel spray caused by a fuel system leak such as a broken fuel injection line.

High-pressure fuel can penetrate your skin and result in serious injury.

If you are exposed to high-pressure fuel spray, obtain prompt medical treatment.

3. Check that the exhaust color, engine vibration and sound are normal.

4. When there are no problems, keep the engine at low speed with the boat still stopped to distribute engine oil to all parts of the engine.

38 YM Series Operation Manual

© 2009 Yanmar Marine International