Valve Clearance Inspection And Adjustment - Honda BF2D Series Manual

3) Visually inspect the spark plug. Discard the plug if the
insulator is cracked or chipped.
4) Remove carbon or other deposits with a stiff wire brush.
5) Measure the plug gap with a wire-type feeler gauge. If
necessary, adjust the gap by bending the side electrode.
1
Spark plug gap
1
0.6
-
0.7 mm (0.024
-
0.028 in)
Recommended NGK CR5HSB
spark plug
1
DENSO U16FSR-UB
6) Make sure t h ion;
replace if necessary.
7) Install the plug fingertight to seat the washer, then tight-
en with a plug wrench to compress the sealing washer.
If reinstalling the used spark plug, tighten 118
-
114
turn after the spark plug seats.
If
installing a new spark plug, tighten 112 turn after the
spark plug seats.
CAUTION
A loose spark plug can become very hot and may
damage the engine. Overtightening the spark plug
can damage the threads in the cylinder head.
0.6
-
0.7 mm
(0.024
-
0.028 in)
121
WIRE BRUSH
--
8) Reinstall the spark plug cap, and install the engine cover.
1
Valve clearance inspection and adjustment must be per-
1
1
formed with the engine cold.
1) Remove the engine (P. 6-11,
2) Remove the four 5 x 12 mrn flange bolts.
3) Loosen the valve cover by slightly prying up each corner,
then remove the valve cover.
Catch up the spilled engine oil with a shop towel when
removing the valve cover.
CAUTION
1
Do not remove the valve cover w i t h excessive
1
1
force. It can deform the valve cover.
1
Replace the valve cover if
it
is deformed.
VALVE COVER
3-4
Page: 24
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Honda BF2D Outboard Motors Shop Manual -
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