7469A15 Mercury CARBURETOR (CENTER)

Fill Water
Always add conditioner to water. Never use plain water only.Acceptable water for use in the preparation of ethylene glycol-type antifreeze and water mixture is shown on the chart below. Antifreeze
Use ethylene glycol-type antifreeze. Use the correct amount to provide freeze protection to the lowest expected operating environment.Conditioner
Use Caterpillar Cooling System Conditioner or equivalent. Follow the instructions on the container.On a new or reconditioned engine add 1 liter (1 quart) of Caterpillar cooling system conditioner, or equivalent, for each 30 liters (8 U.S. gallons) so that the cooling system will have a 3% to 6% concentration of conditioner.If the engine is not equipped with spin-on coolant conditioner elements, add .50 liter (1 pint) of Caterpillar cooling system conditioner for each 15 liters (4 U.S. gallons) of coolant used every 250 service hours or monthly, to maintain a 3% to 6% concentration.Coolant Conditioner Element
Contact your Caterpillar dealer for the correct coolant conditioner element.Fuel Specifications
Types of Fuel
Caterpillar Diesel Engines have the ability to burn a wide variety of fuels. These fuels are divided into two general groups, preferred and permissible.The preferred fuels provide maximum engine service life and performance. They are distillate fuels. They are commonly called fuel oil, furnace oil, diesel fuel, gas oil or kerosene.The permissible fuels are crude oils or blended fuels. Use of these fuels can result in higher maintenance costs and reduced engine service life.See "Fuels for Caterpillar Diesel Engines," Form SEHS7067, for a detailed summary of preferred and permissible fuels and their specifications.Cetane Requirement
The minimum fuel cetane number recommended for the engine is 40.Fuel Cloud Point
Fuel waxing can plug the fuel filters in cold weather. The fuel cloud point must be below the temperature of the surrounding air to prevent filter waxing and power loss. Fuel heating attachments are available from your Caterpillar dealer to minimize fuel filter waxing.Fuel Sulfur Content
The percentage of sulfur in the fuel will affect the engine oil recommendations. If the fuel has over 0.5% sulfur content, the CD engine oil must have a Total Base Number (TBN) of 20 times the percentage of fuel sulfur (TBN as measured by the ASTM D-2896 method). If the sulfur content is greater than 1.5% by weight, use an oil with a TBN of 30 and reduce the oil change interval by one half. Consult your Caterpillar dealer for correct engine oil recommendations.Lubricant Specifications
The abbreviations listed below, follow S.A.E. J754 nomenclature. The classifications follow S.A.E. J183 classifications. The MIL specifications are U.S.A. Military Specifications. These definitions will be of assistance in purchasing lubricants. The specific classifications for this engine are found on the "Recommended Lubricant Viscosities" Chart.Engine Oils (CD)
Use oils that meet Engine Service Classification CD (MIL-L-2104D).Consult the "EMA Lubricating Oils Data Book," Form SEBU5939, for a listing of CD oil brands.
The percentage of sulfur in the fuel will affect the engine oil recommendations. If the fuel has over 0.5% sulfur content, the CD engine oil must have a Total Base Number (TBN) of 20 times the percentage of fuel sulfur (TBN as measured by the ASTM D-2896 method). Your oil supplier should be able to furnish the correct oils.
Change oil and filter element after first 50 hours of operation for new or reconditioned engines.Lubricating Grease (MPGM)
Use Multipurpose-type Grease (MPGM) which contains 3% to 5% molybdenum disulfide. NLGI No. 2 Grade is suitable for most temperatures. Use NLGI No. 1 or No. 0 Grade for extremely low temperatures.