Repair; Replace Alternator Belt; Remove And Install Alternator - Yanmar BY Series Service Manual

Repair

12/05

REPAIR

Replace Alternator Belt

1. Disconnect battery negative (-) cable from the
battery.
2. Remove belt guard.
3. Remove seawater pump belt. See Replace
Seawater Pump Belt on page 7-19.
Note: Figure 11-1(A) shows belt routing for
stern drive equipped models.
Figure 11-1(B) shows belt routing for
marine gear equipped models.
Figure 11-1Belt Routing
A
(2)
(6)
(3)
(2)
B
(6)
Figure 11-1
1 – Belt Tensioner
2 – Coolant Pump
3 – Crankshaft
4 – Alternator
5 – Fixed Idler
6 – Seawater Pump
7 – Power Steering Pump (Stern Drive Only)
4. Use a socket and breaker bar to rotate the belt
tensioner and relieve belt tension. Remove belt.
NOTICE: If belt is to be reused, note direction of
travel and install in same direction of travel.
BY Service Manual
(7)
(1)
(5)
(4)
(1)
(5)
(3)
(4)
0003690
© 2009 Yanmar Marine International
5. Installation is the reverse of removal.
CAUTION! Pinch Hazard. ALWAYS use care
not to pinch a finger between belt and pulley
while installing belt. Failure to comply may
result in minor or moderate injury. NOTICE:
Ensure belt correctly engages all grooves of
each pulley. Failure to do so will lead to
premature belt failure.

Remove and Install Alternator

1. Disconnect battery negative (-) cable from the
battery.
2. Remove belt guard.
3. Remove alternator belt. See Replace Alternator
Belt on page 11-5.
4. Disconnect positive (+) cable (Figure 11-2, (1))
from alternator.
Figure 11-2
Figure 11-2
5. Disconnect connector (Figure 11-2, (2)) from
alternator.
ALTERNATOR
11-5