Section 4 - Maintenance
90-8M0113856 eng DECEMBER 2015 Page 39
• There are special tools and equipment that are required to perform some repairs. Do not attempt these repairs unless you
have these special tools and/or equipment. You can cause damage to the product in excess of the cost a dealer would
charge you.
• Also, if you partially disassemble an engine or drive assembly and are unable to repair it, the dealer's mechanic must
reassemble the components and test to determine the problem. This will cost you more than taking it to the dealer
immediately upon having a problem. It may be a very simple adjustment to correct the problem.
• Do not telephone the dealer, service office, or the factory to attempt for them to diagnose a problem or to request the repair
procedure. It is difficult for them to diagnose a problem over the telephone.
Your authorized dealer is there to service your power package. They have qualified factory trained mechanics.
It is recommended you have the dealer do periodic maintenance checks on your power package. Have them winterize it in the
fall and service it before the boating season. This will reduce the possibility of any problems occurring during your boating
season when you want trouble free boating pleasure.
Inspection
Inspect your power package often, and at regular intervals, to help maintain its top operating performance and correct potential
problems before they occur. The entire power package should be checked carefully, including all accessible engine parts.
• Check for loose, damaged or missing parts, hoses and clamps; tighten or replace as necessary.
• Check plug leads and electrical leads for damage.
• Remove and inspect the propeller. If badly nicked, bent, or cracked, contact your authorized Mercury MerCruiser dealer.
• Repair nicks and corrosion damage on power package exterior finish. Contact your authorized Mercury MerCruiser dealer.
Sealed Carburetor Mixture Screw
IMPORTANT: Changing the mixture setting on this engine can affect the exhaust emissions level and void the emissions
certification. Do not adjust or remove the mixture settings or remove the mixture screw seals. See your authorized Mercury
dealer or emissions testing agency.
Maintenance Schedules—3.0 MPI ECT
Routine Maintenance
NOTE: Only perform maintenance that applies to your particular power package.
New sterndrive installations may require as much as 470 mL (16 fl oz) of gear lube added to the monitor bottle during the
break‑in period (20 hours of running time). It is important to monitor and maintain the gear lube level during the break‑in period.
During the initial drive installation, air may be trapped in the top of the driveshaft housing. This void is filled from the gear lube
monitor during the sterndrive break‑in period. As the air is purged from the sterndrive through the monitor bottle, the lube level
in the bottle will drop.
Task Interval
Maintenance to Be Performed
Each day start
• Check the engine oil level. (You can extend this interval based on experience with the
product.)
• Check the sterndrive gear lube level.
• Check the trim pump oil level.
• Check the power‑assisted steering pump or the compact hydraulic steering fluid level,
depending on the steering system of your model.
Each day end
• If operating in saltwater, brackish water, or polluted water, flush the seawater section of the
cooling system after each use.
Weekly
• Check the water inlets for debris or marine growth.
• Check and clean the seawater strainer, if equipped.
• Check the coolant level.
• Inspect the sterndrive anodes and replace if eroded 50% or more.
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