MerCruiser 8.1 MAG, Owner'S Manual

Page: 112 / 152

Section 5 - Maintenance
Page 104 90-864839070 AUGUST 2007
Description Where used Part number
Mercury Phantom Black Bare metal 92‑ 802878‑1
• Spray all electrical connections with sealant.
Tube Ref No. Description Where Used Part No.
25
Liquid Neoprene All electrical connections 92- 25711 3
• Inspect the sacrificial trim tab or anode plate if equipped, at regular intervals and replace
it before it is half gone. If a stainless steel propeller is installed, additional anodes or a
MerCathode System will be required.
• Inspect the propeller shaft for fishing line, which can cause corrosion on a stainless
steel shaft.
• Remove the propeller at least every 60 days and lubricate the propeller shaft.
• Do not use lubricants containing graphite on or near the aluminum in saltwater.
• Do not paint trim tabs or the mounting surface.
Draining the Seawater System
!
CAUTION
Water can enter the bilge when the drain system is open, damaging the engine or causing
the boat to sink. Remove the boat from the water or close the seacock, disconnect and
plug the seawater inlet hose, and ensure the bilge pump is operational before draining.
Do not operate the engine with the drain system open.
IMPORTANT: Only drain the seawater section of the closed cooling system.
IMPORTANT: The boat must be as level as possible to ensure complete draining of the
cooling system.
Your power package is equipped with a drain system. Refer to
Drain System
Identification
to determine which instructions apply to your power package.
IMPORTANT: The engine must not be operating at any point during the draining procedure.
Drain System Identification
This power package comes with one of several available seawater drain systems. See the
following information to identify the specific drain system on your power package. You are
responsible for identifying your drain system. Mercury MerCruiser is not responsible for
freeze damage.