Mercury Racing 500R - Engine Oil Recommendations-500 R; Checking and Adding Engine Oil

The fuel demand valve has a manual release. The manual release can be used
(pushed in) to open (bypass) the valve in case of a fuel blockage in the valve.
a - Fuel demand valve ‑ installed in the
fuel hose between the fuel tank and
engine
b - Manual release
c - Vent/water drain holes
Engine Oil Recommendations—500R
Mercury Racing 10W‑30 MRX Full Synthetic Oil is the preferred choice for best
performance and general, all‑temperature use. Use Mercury Racing 25W‑50
NMMA certified FC‑W® Marine Synthetic Blend Marine Engine Oil if Mercury
Racing 10W‑30 MRX Full Synthetic Oil is not available.
If the recommended Mercury Racing FC‑W certified oils are not available,
a major outboard manufacturer's brand of NMMA FC‑W certified 4‑Stroke
outboard oil of the same viscosity may be used.
IMPORTANT:The use of nondetergent oils or multiviscosity oils (other than
Mercury or Quicksilver NMMA FC‑W certified oil or a major brand NMMA FC‑W
certified oils) are not recommended.
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Checking and Adding Engine Oil
IMPORTANT:Inspect oil for signs of contamination. Oil contaminated with
water will have a milky color to it; oil contaminated with fuel will have a strong
fuel smell. If contaminated oil is noticed, have the engine checked by your
dealer.
a
c
b
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FUEL AND OIL
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