90190 Mercury SCREW, FUEL PUMP

Checking Air Cleaner Service Indicator
Before starting, check the window of the indicator. If the red piston is locked in the raised position, service the air cleaner as outlined. Have spare elements on hand to install while cleaning used elements.
Service the air cleaner with the engine STOPPED.
PISTON LOCKED IN RAISED POSITIONSingle Stage Air Cleaner
Servicing Single Stage Air Cleaner
1. Remove the air cleaner cover and element.
REMOVING COVER AND FILTER ELEMENT2. 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.
CLEANING INSIDE OF AIR CLEANER
1. Air Inlet Cover4. Inspect the replacement element for damage and dirt.5. Remove the covering from the air inlet opening.6. Install the element.
INSTALLING AIR CLEANER ELEMENT7. Install the air cleaner cover.8. Reset the service indicator piston by pushing the reset button. (See the instructions for air cleaner element cleaning).
RESETTING AIR INDICATOR PISTONTwo Stage Air Cleaner
Emptying Dust Collector Cup
1. Loosen the clamping bolt on the lower body.2. Remove and empty the dust collector cup.3. Inspect and install the seal; install a new seal if necessary.
REMOVING DUST CUP
1. Seal4. Inspect the tubes in the lower body. If dirty, clean the tubes with a round bottle brush.5. Install the dust collector cup.Cleaning The Lower Body
1. Remove the dust collector cup.2. Loosen the clamping bolt on the upper body.
REMOVING LOWER BODY
1. Seal3. Remove the lower body. Clean the tubes from both ends.4. Inspect and install the upper body seal. Install a new seal if it is damaged.Installing Replacement Filter Element
1. Remove the cover.
REMOVING COVER AND INNER COVER2. Remove the inner cover and filter element. In cold weather, a stuck inner cover may be removed by warming the air cleaner cover to 70-75°F (21-24°C).
REMOVE ELEMENT3. Clean all parts of the air cleaner.4. Inspect the replacement element for damage and cleanliness.5. Install the element, inner cover, and wing nut. Tighten the wing nut to prevent dust from bypassing the filter element.6. Install the cover.If, after servicing the air cleaner, the exhaust smoke and/or loss of power continues; or the service indicator locks in the raised position, discard that element and install a new element. Install a new element at least once a year.Cleaning Used Air Cleaner Elements
Cleaning With Pressure Air
1. Use clean, dry air-100 PSI maximum. Hold the nozzle at least one inch from the element and at a slight angle. (A direct blast can rip the pleating).
CLEANING ELEMENT WITH AIR2. 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 With Water
1. Use clean water at no more than 40 PSI. Do not use a nozzle.2. Direct the water stream along the complete length of each pleat on the CLEAN side of the element.
CLEANING ELEMENT WITH WATER3. 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 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 maximum) along the complete length of each pleat.
WASHING ELEMENT WITH DETERGENT3. 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.Storing Cleaned 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 has ruptured and will tear with further use. Discard the element.
INSPECTING ELEMENT2. Wrap usable elements in heavy paper.3. Store the wrapped element in a dry, clean place.Precleaner
Servicing
When the precleaner body is 3/4 full, remove and empty the precleaner. Wash the precleaner in water.