PIPER AIRCRAFT, INC.
PA-28-161, WARRIOR III
MAINTENANCE MANUAL
PAGE 17
Nov 30/06
5C23
74-10-00
(18) Connect condenser wire
(a) Connect condenser wire to the remaining terminal of the contact assembly.
(b) Attach the terminal with the lead pointing left.
(19) Insert the top boss of the distributor housing into its mating pilot on the magneto frame.
CAUTION: MAKE SURE THE CARBON BRUSH IS CONTAINED WITHIN THE
DISTRIBUTOR SHAFT DURING ASSEMBLY. IF THE CARBON BRUSH
CATCHES ON THE SIDE OF THE DISTRIBUTOR SHAFT, THE COIL STRAP
WILL BE BENT INTO THE WRONG POSITION DURING ASSEMBLY.
(20) Gently rotate the distributor housing onto the magneto frame.
(21) Secure the housing with three long screws and one short screw. Torque all four to 24 in-lbs.
(22) Remove T-118 timing pin.
F. Testing
Complete Magneto Reassembly, above. Verify that the T-118 Timing Pin has been removed.
(1) Mount the magneto on a suitable test stand in the same relative position as installed on the
engine.
(2) Install a Slick High-Temperature Ignition Harness on the magneto and connect each output
lead to a 5mm spark gap.
CA
UTION: DO NOT OPERATE THE MAGNETO UNLESS THE IGNITION HARNESS IS
INSTALLED AND THE OUTPUT LEADS ARE CONNECTED TO THE 5MM GAP.
(3) Impulse Coupling
(a) Rotate the test stand drive pulley in the same direction of rotation stated on the magneto
data plate.
(b) The impulse coupling should engage the stop pin in the magneto frame below
approximately 200 RPM. If the impulse coupling pawls slip past the stop pin or engage
intermittently, the impulse coupling is not operating properly.
(4) Coming-in Speed
(a) Determine the lowest speed at which the magneto can be turned and still spark all 5mm
gaps without missing.
(b) The test gap must fire consistently at 200 RPM on non-impulse coupled magnetos and
350 RPM on impulse coupled magnetos.
G. Installation
W
ARNING: BE SURE SWITCH IS IN OFF POSITION AND THE P LEAD IS GROUNDED.
When installing new or adjusting breaker points and before timing the magneto to the engine, it is
important that the internal timing of the magneto be correct. To find number one tower, the following
instructions should be performed:
NOTE: No need to spark out these magnetos.
(1) Insert the T - 118 timing pin in the L or R hole in the distributor block (depending on rotation of
the magneto).
(2) Turn rotor opposite the rotation of the magneto until the pin engages the gear.
(3) If the pin is binding and will not go in the hole in the gear, you have hit the pointer on the gear.
Pull the pin out, enough to continue opposite rotation until the pointer has passed, re-insert
pin.
(4) When the pin sticks through the hole in the gear about 1/4 inch, you are now ready to fire
number one cylinder.
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