Piper Navajo PA-31 Service Manual page 567

PIPER NAVAJO SERVICE MANUAL
TABLE VIIIB-III. TROUBLESHOOTING CHART (ENGINE) (cont.)
Trouble
Cause
Remedy
Rough engine.
Defective plug leads.
Check plug leads for
continuity and break
down according to para-
graph 8B-24. Check dis-
tributor block for
moisture and carbon
tracking. Check contact
springs in distributor
block according to para-
graph 8B-19. Check mag-
neto contact assemblies
for burning or dirt,
(Main and Retard) ac-
cording to paragraph
8B-19. Check distributor
timing according to
paragraph 8B-19, d.
Magneto check out-
of-limits.
Defective spark plugs.
Check magneto-to-engine
timing per paragraph
8B-20. Inspect contact
assemblies for proper
opening. (Refer to
paragraph 8B-19.)
Check plugs and leads.
Try new spark plugs.
NOTE
For additional
troubleshooting
for
the engine
and
turbocharger, refer to Table VIII-II, Section VIII. Use Table
VIII-II in conjunction with Table VIIIB-III.
Reissued: 10/12/79
POWER PLANT
2L21