Honda Marine BF75A Owner's Manual page 121

10. MAINTENANCE
0.0244028 in
(0.6-0.7
mm)
SEALING
WASHER
6. Measure the plug gaps with a spark
Plug gap gauge.
The gaps should be 0.024-0.028 in
(0.6-0.7 mm). Correct as necessary
by carefully bending the side elec-
trode.
7. Thread the plugs in by hand to pre-
vent cross threading.
8. After the spark plugs are seated,
tighten with the spark plug wrench
and 17 mm wrench from the tool kit
to compress the sealing washers.
If installing new spark plugs, tighten
l/2 turn after the spark plugs seat
to compress the sealing washers. If
reinstalling used spark plugs, tighten
l/8 - l/4 turn after the spark plugs
seat to compress the sealing washers.
CORD 1
CORD 2
CORD 3
CORD 4
PLUG 1
PLUG 2
PLUG 3
PLUC 4
9. Reinstall the spark plug caps, match-
ing the numbers on the cords with
the cylinder numbers, as shown.
The spark plugs must be securely
tightened. A loose spark plug can
become very hot and may cause
engine damage. Overtightening the
spark plugs can damage the threads.
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