MAINTENANCE
53
Checking Fluid Levels
CHECKING ENGINE OIL (RESERVOIR)
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.
1. With the engine at idle, observe the oil reservoir sight tube.
a - Oil reservoir sight tube
2. Oil level in the reservoir sight tube should be approximately even
with the bottom of the reservoir split ring.
IMPORTANT: Do not overfill engine oil.
NOTE: If the engine is not operated for a period of time (several days or
longer), a certain amount of oil may drain from the reservoir back into the
engine oil pan. When the engine is started this oil will be pumped back
into the reservoir.
CHECKING DRIVE UNIT OIL
!
CAUTION
Avoid damage to the sterndrive. The input shaft housing must be filled
with lubricant on driveline models.
IMPORTANT: If more than 59 ml (2 fl oz) of gear lube is required, a seal
may be leaking. Damage to drive unit may occur due to lack of lubrication.
Contact your authorized Mercury Marine dealer for service.
Fill dry sump drive and transom input shaft housing with TORCO MTF
Gear Oil.
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