883925 Mercruiser PUMP, Circulating

Checking Oil Pressure
Immediately after starting and frequently during operation, observe the oil pressure gauge. If the gauge indicator registers below "NORMAL", or if the indicator fluctuates, check the oil level and take corrective measures. Checking Oil Level
Check the oil level with the engine idling. Oil level must be between the ADD and FULL marks on the dipstick. Add oil as required. Draining Crankcase Lube Oil
With engine stopped and oil warm:1. Wipe dirt from each oil filter housing. 2. Remove the oil filter housing drain plug. 3. Remove the crankcase oil plug. 4. Allow oil to drain. Clean and install drain plug.Cleaning Breather
1. Release the hose clamp and disconnect the fumes disposal tube. 2. Remove the breather assembly. 3. Inspect the gasket. Replace if necessary. 4. Wash the breather and elements in clean solvent.5. Install the breather and fumes disposal tube.Changing Filter Elements
1. Drain the filter housing.2. Loosen the filter housing mounting bolt. 3. Remove housing and element. 4. Remove element from housing. 5. Wipe filter base. 6. Clean filter housing. 7. Inspect gasket in filter base. Replace gasket if necessary. 8. Install new element and housing.9. Install filter drain plug.Filling Crankcase
1. Fill the crankcase to the SAFE STARTING RANGE on the ENGINE STOPPED side of dipstick. See the Lubrication and Maintenance Chart for refill capacity and proper oil to use.2. Check oil level before starting. 3. Start and run engine. Check for oil leaks.4. After engine is warm, check oil level with engine idling. Add oil if necessary.Air Induction And Exhaust System
Single Stage Air Cleaner
Changing Filter Element
Service the air cleaner with the engine STOPPED.
1. Remove cover (1).2. Remove wing bolt (2); inspect the gasket. Replace the bolt assembly if the gasket needs replacing. 3. Remove filter element (3). Cover the air inlet opening (4) to prevent dirt from entering the engine.4. Clean the inside of the air cleaner cover, and the air cleaner body.5. Inspect the replacement element for damage and dirt.6. Remove the covering from the air inlet opening.7. Install the element. Tighten the wing bolt securely. Install the air cleaner cover.See the instructions for air cleaner element cleaning.Changing Filter Element [Heavy Duty]
Service the air cleaner with the engine STOPPED.
1. Remove the air cleaner cover and element. 2. Cover the air inlet opening to prevent dirt from entering the engine.3. Clean the inside of the air cleaner cover and the air cleaner body. 4. Inspect the replacement element for damage and dirt.5. Remove the covering from the air inlet opening.6. Install the element. 7. Install the air cleaner cover.Cleaning Filter Elements
Cleaning Elements With Air
When using pressure air, wear protective face shield and clothing. Use 30 psi (205 kPa) maximum pressure air for cleaning purposes.
1. Use clean, dry air - 30 psi (205 kPa) maximum. Hold the nozzle at least one inch from the element and at a slight angle. (A direct blast can rip the pleating.) 2. Direct the air stream along the complete length of each pleat on the CLEANEST side of the element. (This will loosen the dirt from the dirtier side.)3. Blow the loosened dirt from the DIRTY side.4. Direct the air from the CLEAN side through to the DIRTY side to remove dirt blown into the pleating.Cleaning Elements With Water
1. Use clean water at no more than 40 psi (280 kPa) maximum. Do not use a nozzle.2. Direct the water stream along the complete length of each pleat on the CLEAN side of the element. 3. Direct water along the complete length of each pleat on the DIRTY side of the element.4. Rinse the CLEAN side of the element.5. Allow the cleaned element to dry thoroughly.Cleaning Elements With Detergent
1. Wash both sides of the element in a solution of warm water and non-sudsing household detergent.2. Rinse the cleanest side of the element with clean water, 40 psi (280 kPa) maximum, along the complete length of each pleat. 3. Rinse the opposite side of the element along the complete length of each pleat.4. Rinse the first side again to remove all loosened dirt.5. Allow the cleaned element to dry thoroughly.Inspecting Clean Elements
1. Hold the dried element in front of a lighted electric bulb. Carefully inspect the element for tiny, pinpoints of light. Any light showing indicates a pleat is torn. Discard the element. 2. Wrap usable elements in heavy paper.3. Store the wrapped element in a dry, clean place.Valve Lash
Checking Valve Lash
1. Stop the engine.2. Wipe the base of the valve cover to keep dirt from getting into the valve mechanism. 3. Remove the valve cover.