Page 274 - REPOWER REFERENCE GUIDE (2020)

Critical Procedures
Lubricants, Sealants, Adhesives

Tube Ref No. Description Where Used Part No.
25W-40 Synthetic Blend 4-
139 Stroke Marine Engine Oil Engine crankcase 92-8M0078629

Special Tools

Belt Tension Gauge Kent Moore BT‑33‑73‑F

Measures serpentine belt deflection.

39451

Remote Starter Switch 91‑ 52024A 1

Provides a remote starter button to crank the engine when performing service
procedures.

10882

Serpentine Drive Belt

! WARNING

Inspecting the belts with the engine running may cause serious injury or death. Turn off the engine and remove the ignition
key before adjusting tension or inspecting belts.

IMPORTANT: The brackets and washers on the three idler pulleys must be in a certain order or the serpentine belt will come
off. All pulleys are referenced as though you were standing in front of the engine looking at the belt.
Sterndrive Models

d a d a
b b

a
f f

c 6117
c
e 6116

With a seawater pump Without a seawater pump
a - Idler pulley (tighten to specification)
b - Water circulating pump pulley
c - Crankshaft pulley
d - Alternator pulley
e - Seawater pump pulley
f - Power steering pump pulley

Page 8B-2 © 2019 Mercury Marine 90-8M0149179 eng NOVEMBER 2018