Honda BF90D User Manual

130
MAINTENANCE
Spark Plugs
To ensure proper engine operation,
the spark plug must be properly
gapped and free of deposits.
The spark plug becomes very hot
during operation and will remain
hot for a while after stopping the
engine. Allow the engine to cool
before servicing the spark plug.
See page 132 for instructions of
handling the iridium spark plugs
(optional parts).
<Standard Spark Plug>
Recommended spark plug:
ZFR6K-9E (NGK)
Use only the recommended spark
plugs or equivalent. Spark plugs
which have an improper heat range
may cause engine damage.
<Inspection and Replacement>
1. Disconnect the battery 
negative (–) terminal.
2. Unlock and remove the engine
cover (see page 59).
3. Remove the 6 × 20 mm flange SH
bolt and remove the plug
maintenance cover.
PLUG MAINTENANCE COVER
6 × 20 mm FLANGE SH BOLT
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Honda BF90D Specifications

General

Bore & Stroke	73 mm x 89.4 mm
Horsepower	90 HP
Cooling System	Water Cooled
Starting System	Electric
Gear Ratio	2.33:1
Trim Range	-4° to +16°
Tilt Range	70°
Dry Weight	163 kg (359 lbs)
Lubrication	Wet Sump
Recommended Fuel	Unleaded Gasoline (86 Octane or higher)
Gear Shift	F-N-R
Steering	Remote
Trim Method	Power Trim and Tilt
Displacement	1496 cc
Exhaust	Through propeller
Alternator Output	44 Amps
Recommended Engine Oil	10W-30 FC-W
Shaft Length	20" or 25"
Engine Type	4-Stroke SOHC, 4 Cylinders
Fuel Delivery	Programmed Fuel Injection