Mercury Mariner 25HP 4-Stroke Outboard Service Manual 1997, Page 7Get this manual
Specifications Models 25 (4-Stroke)
HORSEPOWER (kW) OUTBOARD WEIGHT FUEL ENGINE OIL CAPACITY ENGINE OIL SAE Co 25W-40 FO
+100 +80 +38 +27 +16 1+4
Model 25
25 h.p(18.6 Kw) 5750 RP M
Electric
25 EL RECOMMENDED GASOLINE 2241bs(102 kg)
Automotive Unleaded with Minimum Pump Posted Octane Rating of 87
Either Quarts or Uters SAE 1OW-30 viscosity oi is recommended for use in all temperatu resSAE 2SW-40 viscosity oil may be used at temperatures above 40 (4 C)
Use Quicksilver 4-Cycle Marine Oil with the proper viscosity for the expected temperature in your area (see range the rmomete on left)It not available, use prem ium quality 4-cycle engine oi l, certified to meet or exceed anyone of the followi ng American Petroleum Institute (A PI) service classifications SH, SG, SF, CF-4, E, CD, Oli