IMPORTANT: The use of nondetergent oils, multi‑viscosity oils (other than
Mercury or Quicksilver NMMA FC‑W certified oil or a major brand NMMA FC‑W
certified oil), synthetic oils, low quality or oils that contain solid additives are not
recommended.
Recommended SAE viscosity for
engine oil
a - Mercury or Quicksilver SAE
25W‑40 Synthetic Blend Marine
4‑Stroke Engine Oil may be used
at temperatures above 4 °C
(40 °F)
b - Mercury or Quicksilver SAE
10W‑30 4‑Stroke Marine Engine
Oil is recommended for use in all
temperatures
Checking Engine Oil
IMPORTANT: Do not overfill. Be sure that the outboard is upright (not tilted)
when checking oil.
1. Turn the engine off. Have the outboard in a level operating position.
Remove the top cowl.
2. Remove the dipstick. Wipe the dipstick with a clean rag or towel and push
it back in all the way.
3. Pull the dipstick out again and observe the oil level. If oil level is low,
remove the oil filler cap and fill to (but not over) the full mark with the
recommended 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.
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