Honda C65 - Contact Points; Spark Plug Adjustments; Insufficient Breaker Point Gap; Excessive Beraker Point Gap

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Normal
Figure 6 -11. Br ea ker
Figure 6- 12.
Spark plug clean er
Figure 6- 13. Measuring spark gop
Spark plug
Figure 6- 14. Checking spark p lu g
6. MAINTENANCE INSPECTION
Worn contact point
Side contacting
Dirty contact
points
condition
4. CONTACT POINTS
Inspect the surfaces o f he contac t points; if the y
are burnt or pitted, dress the surf ace with an oilstone
or a point dressing file so th at the center of the
points are making contact. (Fig. 6-10 , 6-11)
After the points have been dressed, wash in
gasoline or trichloroethylene to re m ov e all trace of
oil.
Insufficient breaker point gap
@ The sp ark tends to linger, that is the interruption
of the primary circuit is not completed at the
points, therefore, the secondary high voltage
build -up is reduced .
(6) The closed duratio n of the points is longer,
produc ing heat and resulting in damage.
@ In conjunction with (6) above, the points wil l be
late in openi ng with a consequent dela y in the
ig ni tion timing ; this will cause a drop in power
outpu t.
Excessive breaker point gap
@ The duration that the points are closed is too
short to allow for sufficient current f1ow in the
pr imary c ircuit with a consequent l ow voltage
build -up in the seco ndary or the high te nsion
vo ltag e ci rc uit. This condition will cause poor
engine st arting, spark missing at high speed and
a consequent loss
of pow er.
(6) Engine over -heat s readil y.
@ The ignition timing is greatly advanced.
5. SPARK PLUG ADJUSTMENT
A dirty or damag ed s park plugs, or plug el ectro de
which are erro ded will n ot product a good strong
spark,
therefore, the spark plugs should be inspected
pe
ri o dicall y and clea ning and adjustments made. Spark
plugs
with sooty, wet el ectrodes , or e lec tr odes
co ver ed with depos it s w ill permit the high t ension
vo l tage to bypass the gap without sparking.
1.
Cleaning
a. The use of th e spark plug cl eaner is th e recom-
men ded meth od of cleaning the plugs, h owe ver ,
a
sa ti sfac tor y cleaning c an be pe rf ormed by
using a
need le or a stiff wire to remove the
d epos it s and then was h in gaso line fo llo wed by
dr ying with a r ag. (Fig. 6- 12)
b. Adjust
the spark ga p after cleaning.
Set the gap to 0. 6-0.?mm (0.024-0.028 i n)
by bending the elect rod e on the ground side.
(Fig. 6- 13)
Spark Plug Inspection
a. Che ck the spark intensi ty produced between the
gap of the gro und and the center elec tr ode s.
(Fig. 6- 14)
Blue s
por k ..•..... . Good co ndition
Red s park .... ... .. P oor cond iti on