Cessna SKYMASTER 336 1964 Service Manual page 121

ISOLATION PROCEDURE
ENGINE WILL NOT IDLE PROPERLY.
Improper idle speed or idle
See paragraph 10-71.
mixture adjustment.
Leak in air induction system. Check visually.
One or more cylinder head drain Check visually.
lines broken or disconnected.
Propeller control not in high
Check visually.
rpm position.
Defective ignition system.
See paragraph 10-100
Defective fuel injection sys- See paragraph 10-68.
tem.
Vaporized fuel. Fuel vaporization is
Defective aircraft fuel system.
Defective engine.
most likely
to occur in hot weather with a
hot engine.
See paragraph 11-3.
Check compression. Listen for
unusual engine noises.
ENGINE RUNS ROUGHLY OR WILL NOT ACCELERATE PROPERLY.
Propeller control not in high
Check visually.
rpm position.
Defective ignition system.
See paragraph 10-100.
Defective fuel injection sys-
See paragraph 10-68.
tem.
Propeller out of balance.
Check balance.
Interference between engine
Check for positive clearance.
mount and cowling.
Defective engine shock
mounts.
Engine or engine mount attach-
ing bolts loose or broken.
Defective engine.
Check shock mounts.
Check bolts.
Check compression. Listen
for unusual engine noises.
See paragraph 10-71.
Correct cause of leak.
Connect lines. Replace if broken.
Use high rpm for all ground
operations.
See paragraph 10-100.
See paragraph 10-68.
Purge vapor by operating electric
fuel pump with mixture control in
idle cut-off. If necessary, clean
ejector jet in vapor separator cover
with solvent. Do not use wire to
clean jet.
See paragraph 11-3.
Engine repair is required.
Use high rpm for all ground
operations.
See paragraph 10-100.
See paragraph 10-68.
Balance propeller.
Edges of cowling stiffeners and
doublers may be ground for clear-
ance. Holes may be cut in rear
cowling lower fan duct for clearance
with aft ends of rear engine mount.
Edges of front cowling supports
(11, figure 10-1) may be ground
to clear engine mount tubes.
Replace defective parts.
Torque properly. Replace if
defective.
Engine repair is required.
10-4
REMEDY
PROBABLE CAUSE
1.