Mercury Racing 1550 STERNDRIVE, Operation, Maintenance & Warranty

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6 - M
AINTENANCE
90-8M0114812 JANUARY 2016 43
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Interval Task
Every 25 hours of operation or
every 90 days, whichever occurs
first
Tie‑bar mounting bracket nuts ‑
Inspect and tighten to
specifications as needed
Propeller shaft ‑ Lubricate
Propeller nut ‑ Tighten to the
specified torque
Sterndrive ‑ Inspect, clean, and
spray with rust preventative
Every 50 hours of operation or once
a season, whichever occurs first
Perform 25 hour maintenance
items
Sterndrive unit input splines
(internal and external) ‑ Lubricate
Drive input shaft U‑joint crosses ‑
Inspect and lubricate
Drive mounting nuts ‑ Tighten to
136 Nm (100 lb‑ft)
Saltwater use:
Every 50 hours or
60 days of operation, whichever
occurs first
Freshwater use:
Every 100 hours
or 120 days of operation, whichever
occurs first
Steering system ‑ Inspect for
loose, damaged, or missing parts.
Lubricate the steering cylinder
pivot points.
Every 100 hours of operation or
once a season, whichever occurs
first
Perform 25 and 50 hour
maintenance items
Drive unit bellows and clamps ‑
Inspect
Lower gear housing oil ‑ Change
the oil
Interval Task
Driveline models ‑ Lubricate and
inspect the engine to transom
driveshaft U‑joint crosses and slip
joint
Steering head and remote control
‑ Inspect and lubricate
Every 200 hours of operation or at
rebuild
Lower gear housing oil filter and
oil ‑ Change the oil and filter
Every 200 hours of operation or
once a year, whichever occurs first
Perform 25, 50, and 100 hour
maintenance items
Transom input shaft bearing
housing (driveline models only) ‑
Change the oil
C
HECKING
F
LUID
L
EVELS
C
HECKING
E
NGINE
O
IL
(R
ESERVOIR
)
Oil consumption is greatly dependant upon engine speed, with
consumption being highest at wide‑open throttle and decreasing
substantially as engine speed is reduced. It is not uncommon for big
block high performance engines to use up to one quart of oil in one to
five hours if the engine is operated continuously at the upper end of
the RPM range.