Serpentine Drive Belt; Belt Routing; Checking - MerCruiser 496 MAG Owner's Manual

Section 5 - Maintenance

Serpentine Drive Belt

Belt Routing

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

Checking

Inspect the drive belt for:
• Proper belt tension deflection
• Excessive wear
• Cracks
• Fraying
• Glazed surfaces
• Proper tension
Use moderate thumb pressure on the belt at the location with the longest distance between
two pulleys.
Description
Deflection
NOTE: Minor, transverse cracks (across the belt width) may be acceptable. Longitudinal
cracks (in the direction of belt length) that join transverse cracks are not acceptable.
Page 100
a
g
e
a - Idler pulley
b - Water circulating pump pulley
c - Crankshaft pulley
d - Alternator pulley
WARNING
!
b
c f
e - Seawater pump pulley
f - Power steering pump pulley
g - Tensioner pulley
13 mm (1/2 in.)
21062
90-899883240 NOVEMBER 2007
d
8118