Related Manuals for Yanmar 2 QM 20
Summary of Contents for Yanmar 2 QM 20
- Page 1 OPERATION MANUAL Your on-the-job Partner MODEL 2 QM 20 3 QM 30 (F) (Y) Abma's Jachtwerf Eeltje Baasweg 4, 8606 KA Sneek. Tel. 0515 - 419065.
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Page 2: Table Of Contents
6. Abnormal sounds STOPPING AIR VENTING VIII PERIODICAL CHECK Fresh water cooled engine cooling system handling instructions Engine Models 2 QM 20 F, 3 QM 30 F (For pleasure boat) 2 QM 20 Y, 3 QM 30 Y (For work boat) - Page 3 NAME OF PARTS Thermostat Rocker cover Exhaust manifold Fuel oil strainer Fuel injection pump L.O. supply port (clutch case) Cooling water pump F.O. feed pump Propeller shaft coupling Speed control lever Oil dipstick Decompression lever Intake silencer Exhaust elbow Gear lever Hoisting bolt Clutch case Propeller shaft coupling...
- Page 4 BEFORE USING THE ENGINE Fuel 1) Use high grade diesel oil as fuel. 2) Never fail to remove any dirt deposits around cap when filling. Recommended brands of fuel Brand Name Supplier CALTEX Shell Diesoline or local equivalent SHELL Caltex Diesel oil MOBIL Mobil Diesel oil ESSO...
- Page 5 Lubricating oil 1) Choose an oil with proper viscosity for the ambient temperature. 2) In adding lub. oil do not mix different kinds of oil. (brands and/or viscosity) Recommended brands of lub. oil SAE NO. Supplier Brand Name below 10º C 10-20ºC 20-35ºC over 35º...
- Page 6 Amount of lub. oil Model Crankcase Clutch case 2 QM 20 litres litres 3 QM 30 litres litres Running in The new engine must be carefully run in during the first 50 hours and not subjected to strain. After the running in period, retighten any important nuts and bolts that...
- Page 7 PREPARATION Fuel [1-1] Fuel tank 1) Fill the fuel tank 2) Open the fuel cock. Fuel tank F.O. drain cock F.O. cock [1-2] Checking fuel injection 1) Set the speed control lever to the FULL position and the gear lever in NEUTRAL. 2) Disengage the decompression lever, then turn the starting handle two or three times and...
- Page 9 Lubrication oil [2-1] Crankcase/clutch case 1) Check the oil level with the lub. oil dipstick and add fresh Oil dipstick Oil dipstick oil until the level reaches the Upper marking upper mark on the dipstick. NOTE) Lower marking Avoid both overfilling and underfilling.
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Page 11: Starting
STARTING Neutral Starting [1-1] Hand starting 1) Set the gear lever to NEUTRAL. Gear lever 2) Set the speed control lever to FULL. Full 3) Disengage the decompression lever and turn the starting handle vigorously 5 or 6 times. When sufficient momentum has been obtained, release the decompression lever and further turn the starting handle firmly. - Page 13 [1-2] Electrical starting Neutral 1) Set the gear lever to NEUTRAL. Gear lever 2) Set the speed control lever to FULL Full 3) Turn on the battery switch. Battery switch 4) Turn the starter switch to the START position. 5) Release the starter switch as soon as the engine starts. Key switch...
- Page 14 Note) Do not run the starter motor for more than 10 seconds at a time. Should the engine fail to start, wait for about 30 seconds before engaging the starter again. Do not turn the battery switch off while the engine is running.
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Page 15: Warming Up
Warming up Warming up 1) Run the engine without load for at least five minutes. 2) If the engine is running normally, engage low speed with clutch and then gradually increase speed. Check points: Oil leakage Water leakage Gas leakage Abnormal sounds Lamps (Charging. -
Page 16: Points To Check During Operation
POINTS TO CHECK DURING OPERATION Fuel 1) Check the fuel level. C.W. temperature warning lamp 2) Be sure to add fuel before Lub. oil pressure warning lamp the gauge shows emptiness. Lubricating oil 1) Check that the lub. oil pressure Charging lamp warning lamp is out. -
Page 18: Stopping
STOPPING 1) Put the gear lever in NEUTRAL, let the engine idle, then set the speed control lever to STOP. Starting handle Stop NOTE) Never use the decompression lever to stop the engine. Decompression lever... - Page 19 2) Turn the fuel cock to the CLOSE position. 3) If the cooling water is likely to freeze, owing to the weather or other factors, drain it in the following way. (1) Close the kingstone cock (2) Open the cooling water drain cocks. Exhaust manifold Cooling water drain cock Cooling water drain cock...
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Page 21: Air Venting
AIR VENTING Open the fuel cock. Fuel oil strainer Loosen the air venting plug on the fuel strainer. After bubbles stop coming out with the fuel, tighten again. Loosen both the fuel joint on the side of the fuel strainer and the air venting plug on the fuel injection pump. - Page 23 NAME OF PARTS Intake silencer Exhaust elbow Starting shaft Clutch case Gear lever A.C. Generator Lub. oil strainer Lub. oil pressure warning lamp Starter motor Starting shaft Fuel oil strainer A.C. Generator F.O. feed pump Lub. oil strainer...
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Page 24: Periodical Check
VIII PERIODICAL CHECK In order to keep the engine in top running condition, perform regular maintenance checks. In this way small malfunctions can be detected and corrected before they lead to serious engine failure. Item Description First 50 hrs. Daily Every 100 hrs. - Page 26 Fig. 1 Fig. 2 F.O. filter element Lub. oil filter bowl Fig. 4 Fig. 3 L.O. evacuation pump L.O. evacuation pump Fig. 5 Fig. 6 Cooling water pump Impeller Thermostat Fig. 7 Cooling water Exhaust mainifold pump cover Antocorrosive zinc Anticorrosive zinc Fig.
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Page 28: Fresh Water Cooled Engine Cooling System Handling Instructions
Fresh water cooled engine cooling system handling instructions Engine Models 2 QM 20 F, 3 QM 30 F (for pleasure boat) 2 QM 20 Y, 3 QM 30 Y (for work boat) ATTACHED SHEET NO. 1 Fresh water inlet Fresh water tank... - Page 30 Periodical Check Every Every Every Sea water side Daily 250 hrs. 300 hrs. 500 hrs. Drain Check cooling water circulation Check pump impeller and casing Replace anticorrosive zinc Fresh water side Check and refill Clean thermostat Adjust water pump drive belt tension Check cooling pipe in heatexchanger Check cooling water pump...
- Page 31 Diagram of the cooling water system Fresh water line Sea water line Diagram of the cooling water system Cooling Water Pump (Fresh Water) & Heat Exchanger Thermostat Cooling pipe Anticorrosive zinc...
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Page 32: Cooling Water
Handling Precautions Handling the fresh water cooling system of the above engines will be described here. Fresh water tank capacity Model Capacity 2 QM 20 F 6.0 liters 2 QM 20 Y 3 QM 30 F 6.9 liters 3 QM 30 Y Remove the cap from the fresh water cooler, and check the water level. - Page 33 Removing the filter cap Do not attempt to remove the water filter cap at the top of the fresh water tank while the engine is running, or while the engine is still hot after it has been stopped; otherwise, steam will escape and may cause serious injury. If removal of the filter cap is unavoidable, place a piece of cloth over the cap and turn the cap slowly, being sure that you will be safe even if the steam escapes.
- Page 34 Cleaning the heat exchanger pipe If the heat exchanger pipe through which the raw water flows becomes extremely dirty, the cooling affect deteriorate. If the C.W. warning lamp lights periodically when the engine is run at the rated output, clean the pipe in the heat exchanger with a cleaning agent and then flush the accumulated scale produced by cooling the raw water from the pipe.
- Page 35 Installation and maintenance of clean water sub-tank (Special order item) When the temperature of the cooling water inside the clean water tank rises, it eventually turns to steam and escapes to the outside atmosphere. If a sub-tank is combined with the clean water tank, steam from the clean water tank will be restored to hot water, thus considerably reducing the consumption of cooling water.