BEFORE YOU OPERATE 12/05 ENGINE OIL Select the oil viscosity based on the ambient temperature where the engine is being operated. See Engine Oil Viscosity Figure 5 . Engine Oil Specifications NOTICE Yanmar does not recommend the use of engine oil "additives." Only use the engine oil specified. Other engine oils may affect warranty coverage, cause internal engine components to seize and / or shorten engine life. Never mix different types of engine oil. This may adversely affect the lubricating properties of the engine oil. Handling Engine Oil When handling and storing engine oil, be careful not to allow dust and water to contaminate the oil. Clean around the filler port before filling.
Use an engine oil that meets or exceeds the following guidelines and classifications: Do not mix lube oils of different types or brands. Mixing may cause the chemical characteristics of the oil to change and lubricating performance to decrease, reducing the engine’s life. API Service Categories: CD,CF, CF-4, CI and CI-4. The oil must be changed when the Total Base Number (TBN) has been reduced to 2.0. Engine oil should be replaced at the specified intervals, regardless of the engine’s operation history. See Periodic Maintenance Schedule on page 55 . TBN (mgKOH/g) test method: JIS K-2501–5.2–2(HCI), ASTM D4739(HCI) Engine Oil Viscosity Recommended SAE Viscosity: 10W30, 15W40.
Engine oil 10W30 and 15W40 can be used throughout the year. Never use API Service Category CG-4 or CH-4 oils. NOTICE Be sure the engine oil, engine oil storage containers and engine oil filling equipment are free of sediment or water. Change the engine oil after the first 50 hours of operation and then at every 150 hours thereafter. See Changing the Engine Oil on page 61 . Figure 5 Select the appropriate engine oil viscosity based on the ambient temperature shown in the SAE Service Grade Viscosity Chart (Figure 5) . YM Series Operation Manual 31