Piper Comanche PA-24 Service Manual page 437

PIPER COMANCHE SERVICE MANUAL
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FIGURE 7·13, TIMING PLATE INSTALLED
ON BREAKER COMPARTMENT
FIGURE 7·14. BREAKER COMPARTMENT WITH
CAST TIMING MARKS
d,
Rotate the drive coupling from neuml, in ~ left hand direction
10·, Look
through the timing
hole and
align
the chamfered ,ooth of the distributor
gear
with the white line of 'he distributor block.
Ascerum that the
maiD
breaker poinu open
at
this
pOint
and the pointer indic:ates 10° on the plate or "E"
gap in the breaker comparcncnt.
.
.
c. Without moving the dnvc coupli"l from the "E" lap or 10 after nc:urnl position. bend the
pointer back to the 0° mark.
i.
\Ising Oat. Table VII·II determine the degree of retard of the rr.a.gneto being checked. :-Iorm.lly
the correct retard setting will be stunpcd
10
bottom of breaker comparancnt for convenience.
g. Turn the dnvc coupling in the left
b~d
direction until the pointer rea.cites the required number of
degrees retard. the retard breaker points should open at this
pOInt.
I.
Rotate drive coupler. until cam foUowcr
1S
on the htgh poiilt of the cam lobe .. \\easure contact
ciearance. It must be 0 018 or the points must be replaced.
CAUTION
If cam screw was removed be sure to relnstill ... nd torque to 25 lnch
pounds
TABLE VII-II. TL"IING DATA
"'~e,o Type
Pan No.
S~L:-I·200
10·16300S·1
10·16300S·2.
'J, ·7
10·16300S·;
2 811
,\tqneto
Degree Retard
ZO'
2S'
JO·
POWER PLANT
ISSUED: 8/18/72