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CD648
Air Filter Cleaning/Replacement
1 Disconnect crankcase vent hose from end of air cleaner. Carefully remove air cleaner foam element from
around air intake screen housing mounted on turbocharger inlet. Wash foam element in warm water and deter-
gent until clean.
A Crankcase Vent Hose
B Foam Element
C Intake Screen Housing
CAUTION
Avoid potential fire hazards and injury, or damage to polyester foam element. Do not clean foam ele-
ment in petroleum based solvents or cleaners.
IMPORTANT: No treatment (such as partial oil saturation) is required or recommended on air cleaner
foam element prior to use. Use element clean and dry for proper filtration.
Allow element to completely dry before use and install around air intake screen. Replace the foam element if
it is deteriorated or torn. (Refer to “Maintenance Schedules” for replacement interval under normal conditions.)
IMPORTANT: To prevent unfiltered air from entering the engine be certain that all of the air intake screen
is covered by the foam element when installed.
CD649
Drive Belts - All Engines, Except D3.6L Engines
All drive belts must be periodically inspected for tension and condition (excessive wear, cracks, fraying, or glazed
surfaces).
If any drive belts need replacement or tension needs adjustment, see your Authorized Mercury MerCruiser
Dealer.
IMPORTANT: On models with dual-row pulleys and dual belts always inspect both belts. Never renew
just one of the two belts driving the alternator and engine water circulating pump. Always replace both
belts as a pair, preferably as a “matched pair.”
WARNING
Make sure engine is shut off and ignition key is removed before inspecting belts.
ALTERNATOR DRIVE BELT AND ENGINE WATER CIRCULATING PUMP BELT, OR BELTS
2 Inspect drive belt, or belts, for excessive wear or damage.
3 Check belt tension by depressing upper strand of belt, with moderate hand pressure, at point shown. Belt
should move no more than 3/16 in. (5 mm) either way.
POWER STEERING PUMP BELT
4 Inspect drive belt for excessive wear or damage.
5 Check belt tension by depressing upper strand of belt, with moderate hand pressure, at point shown. Belt
should move no more than 3/16 in. (5 mm) either way.
VACUUM PUMP BELT (IF SO EQUIPPED)
6 Inspect drive belt for excessive wear or damage.
7 Check belt tension by depressing upper strand of belt, with moderate hand pressure, at point shown. Belt
should move no more than 3/16 in. (5 mm) either way.
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