Mercury 300R HD CMS Mechanical User Manual

IMPORTANT: Do not loosen the oil drain valve more than 2‑1/2 turns out. The
oil seal could get damaged beyond 2‑1/2 turns.
a - Oil drain valve
b - Drain hose
c - Loosen 2‑1/2 turns maximum
6. After the oil has drained, hand‑tighten the oil drain valve (clockwise) and
remove the oil drain hose.
7. Tighten the oil drain valve to the specified torque. Clean up any oil in the
valve area.
Description
Nm lb‑in. lb‑ft
Oil drain valve 15 132.7 –
IMPORTANT: Overtightening the oil drain valve can damage the oil sump.
8. Add the appropriate amount of engine oil.
OIL CHANGE ON WATER PROCEDURE
1. Tilt the outboard out/up past vertical for approximately one minute to allow
any trapped oil to drain back to the oil sump.
2. Tilt the outboard to a vertical position.
b
a
1
2
2-
c
63398
MAINTENANCE
72 eng

Mercury 300R HD CMS Mechanical Specifications

General

Brand	Mercury
Model	300R HD CMS Mechanical
Category	Outboard Motor
Language	English