Mercury Racing 500R - Gearcase Lubricant

6. To test if the correct propeller has been installed, operate the boat with
a normal load on board at WOT and check the RPM with an accurate
tachometer. The engine RPM should be near the top of the specified
range so that, under a heavy load, the engine speed will not fall below
the specified RPM range. If the engine speed is too low, replace the
propeller with a lower pitch propeller. Normally a 25 mm (1 in.) propeller
pitch change causes an RPM change of 150 RPM.
IMPORTANT:Adaptive Speed Control will not allow the engine to exceed
6400 RPM even if the boat is under propped. Adaptive Speed Control does
not operate like a rev limiter. The operator may not notice that engine power
is being limited because the engine will still reach, but not exceed 6400 RPM.
If a heavy load on board the boat does not cause the engine RPM to drop at
WOT, consider switching to a larger pitch propeller.
IMPORTANT:Using a target of 6350 RPM at WOT will provide the best results
when propping the boat without using CDS G3. This ensures that Adaptive
Speed Control is not limiting the available engine power.
7. Return to idle speed.
8. Shut off the engine.
Gearcase Lubricant
GEARCASE LUBRICATION
When adding or changing gearcase lubricant, visually check for the presence of
water in the lubricant. If water is present, it may have settled to the bottom and
will drain out prior to the lubricant, or it may be mixed with the lubricant, giving it
a milky colored appearance. If water is noticed, have the gearcase checked by
your dealer. Water in the lubricant may result in premature bearing failure or, in
freezing temperatures, will turn to ice and damage the gearcase.
Examine the drained gearcase lubricant for metal particles. A small amount
of metal particles indicates normal gear wear. An excessive amount of metal
filings or larger particles (chips) may indicate abnormal gear wear and should
be checked by an authorized dealer.
500R REQUIRED GEARCASE LUBRICATION
All 500R R‑Drive and R‑Drive Sport gearcases are factory filled with SAE
85W‑90 Extreme Performance Gear Lube. This lubricant conforms to Enlube
MGO‑4‑653‑HP specifications and should not be mixed with other types of gear
lubricant.
Description
Where Used Part No.
SAE 85W-90 Extreme
Performance Gear Lube
All 500R gearcases 8M0111677
MAINTENANCE
 128 eng