Yamaha 150 Owner's Manual page 28

Basic components
The buzzer will sound (if equipped on the
G
tiller handle, remote control box, or main
switch panel).
If the warning system has been activated,
stop the engine and check for the cause.
NOTE:
The warning for oil filter clogging is similar to
the warnings for low oil level and overheat-
ing. To make troubleshooting easier, check
for engine overheating first, then oil level,
and finally oil filter clogging.
23
ZMU04586
1. Oil filter
1
ZMU03025
1. Oil filter
1
ZMU03906
ZMU01952