Yamaha F150 User Manual

Maintenance
85
EMU44333
Inspecting spark plug
The spark plug is an important engine com-
ponent. The condition of the spark plug can
indicate something about the condition of the
engine. For example, if the center electrode
porcelain is very white, this could indicate an
intake air leak or carburetion problem in that
cylinder. Do not attempt to diagnose any
problems yourself. Instead, take the out-
board motor to a Yamaha dealer. You should
periodically remove and check the spark plug
because heat and deposits will cause the
spark plug to slowly break down and erode.
To remove the spark plug
1. Remove the ignition coil cover.
2. Remove the bolt that is securing the igni-
tion coil, and then remove the ignition
coil. NOTICE: Do not use any tools to
remove or install the ignition coil. Oth-
erwise, the ignition coil coupler could
be damaged.
[ECM02331]
3. Remove the spark plug. WARNING!
When removing or installing a spark
plug, be careful not to damage the in-
sulator. A damaged insulator could al-
low external sparks, which could lead
to explosion or fire.
[EWM00562]
To check the spark plug
1. Check the condition of the spark plug. If
electrode erosion becomes excessive or
carbon and other deposits are exces-
sive, replace the spark plug with the
specified plug.
1. Ignition coil cover
1
ZMU07776
1. Bolt
2. Ignition coil
Standard spark plug:
LFR6A-11
2
1
2
1
2
1
2
1
ZMU07777
ZMU07778
U6DV37E0.book Page 85 Monday, December 10, 2018 4:07 PM
©2020 Yamaha Motor Corporation

Yamaha F150 Specifications

General

Tweeter	Yes
Speaker type	2-way
Number of drivers	-
Speaker placement	Floor
Audio output channels	2.0 channels
Number of woofer drivers	2
Number of tweeter drivers	1
Woofer diameter (imperial)	6.5 \
Tweeter diameter (imperial)	1 \
Product color	Black
Impedance	6 Ω
Sensitivity	88 dB
Frequency range	37 - 30000 Hz
RMS rated power	180 W
Connectivity technology	Wired

Weight and Dimensions

Depth	362 mm
Width	200 mm
Height	1030 mm
Weight	11200 g