Inspection; Maintenance Schedules-350/377 Mag Ect And Seacore 350/377 Mag Ect; Routine Maintenance - Mercury 350 MAG Manual

Section 5 - Maintenance
• Do not attempt any repairs unless you are aware of the Cautions, Warnings and procedures required. Your safety is our
concern.
• If you attempt to service the product yourself, we suggest you order the service manual for that model. The service manual
outlines the correct procedures to follow. It is written for the trained mechanic, so there may be procedures you don't
understand. Do not attempt repairs if you do not understand the procedures.
• 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.
Maintenance Schedules—350/377 MAG ECT and SeaCore 350/377 MAG ECT

Routine Maintenance

NOTE: Only perform maintenance that applies to your particular power package.
New Bravo 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
Each day start
Each day end
Weekly
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• 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.
• If operating in saltwater, brackish water, or polluted water, flush the seawater section of the
cooling system after each use.
• 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.
Maintenance to Be Performed
90-8M0050539 MAY 2011
eng