Mercury 25 4-Stroke - Engine Oil Recommendations; Checking and Adding Engine Oil

FUEL & OIL
24
Engine Oil Recommendations
We recommend the use of Mercury or Quicksilver SAE 10W-30 multi-viscosity 4-Stroke Outboard Oil for general,
all-temperature use. If SAE 25W-40 multi-viscosity oil is preferred, use Mercury MerCruiser 4-cycle engine oil or
Quicksilver sterndrive & inboard 4-cycle engine oil. Never use 4-cycle engine oil that is not certified to meet or
exceed any one or combination of the following American Petroleum Institute (API) Service Classification SH, SG,
SF, CF-4, CE, CD, CDII. Severe engine damage may result from use of an inferior oil.
+20
+40
+60
+80
F° C°
0
+100
–7
+4
+16
+27
–18
+38
a
b
ob00327
Recommended SAE Viscosity for Engine Oil
a - SAE 25W-40 viscosity oil may be used at temperatures above 4 °C (40 °F)
b - SAE 10W-30 viscosity oil is recommended for use in all temperatures.
Checking And Adding 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. Flip the handle up and pull out the dipstick. Wipe dipstick with a clean rag or towel and push it back in all the
way.
3. Pull the dipstick back out again and observe the oil level. If the oil level is low, remove the oil filler cap and
fill to (but not over) the upper oil level 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.