Piper Navajo Chieftain PA-31-350 Service Manual page 501

NAVAJO CHIEFTAIN SERVICE MANUAL
TABLE VIII-IV. TROUBLESHOOTING CHART (ENGINE) (cont)
Trouble Cause Remedy
Engine is hard starting.
(cont.)
Vibrator-magneto combi-
nation not "putting-
out" electrically.
Turn engine in proper di-
rection of rotation until
retard points just open
No. 1 cylinder position. Re-
move input connection from
starter to prevent engine
turning and while holding
No. 1 plug lead .19 of an
inch from ground energize
vibrator by activating the
starter switch. Plug lead
should throw a .19 of an
inch spark. If spark is weak
or missing try new vibrator.
If this does not correct
trouble check magneto for
improper internal timing or
improperly meshed distri-
butor gears.
Magneto improperly timed
to engine.
Advance contact assembly
out of adjustment (in-
ternal timing off).
Retard points opening too
late.
Check magneto to engine
timing.
Check magneto timing.
Check timing of retard
points.
Reissued: 9/23/80 POWER PLANT
2J14