Mercury Mariner 25HP 4-Stroke Outboard Service Manual 1997, Page 169Get this manual
3Inslall oil filter Powerhead Installation
1Install powerhead and new gasket with boltsTighten bolts to the specified torque
aOil Filter
Ignition Components
1Refer to Section 2A for installation of the follow ing components55850
aFlywheel bStator
cTiming Belt
aPowerhead Mounting Bolts (4 Each Side)Gasket
Powerhead Mounling Boll Torque
28.0 lbft(38.0 Nm)