Tecumseh HH100 Handbook page 49

8 to 18 hp cast iron four cycle engines
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SOLID
STATE
IGNITION
SYSTEM
(NON-
ALTERNATOR TYPE).
CAUTION: Do not attempt to crank engine with
the primary wire of the transformer disconnected.
Also do not allow the primary wire of the
transformer to be grounded or arc. A broken
wire causing an open circuit to or in the transformer
can also cause permanent damage. See Step
2.
1. Preliminary Tests
Spark Test . . .Check for spark.
Perform the following visual tests:
HIGH TENSION LEAD . . .Inspect for cracks or
indications of arcing. Replace the transformer
if a questionable lead is found.
LOW TENSION LEADS . . .Check all leads for
shorts. Check ignition cut-off lead to see that
unit is not grounded out. Repair leads if possible,
or replace.
FLYWHEEL . . .Check magnets for strength. Check
key and keyway. Be sure that the key locks the
flywheel to the crankshaft.
2. After the above visual checks are made the
transformer and solid state components can be
checked using a Merc-O-Tronic, Graham-Lee or
similar tester.
NOTE: Before using parts for tests, be sure any
problem which caused replacement is corrected
first.
3. When testers are not available... Use new
replacement parts as test for possible failed parts.
SOLID STATE STATOR - Replace and test for
spark.
Time
the
magneto
by
turning
counterclockwise as far as it will go. Tighten retaining
screws to 5-7 foot pounds (6.8 - 12.4 mm).
IGNITION
IGNITION UNIT
PULSE
CUT-OFF
LOW TENSION LEAD
TRANSFORMER
HIGH
LEAD
TENSION
LEAD
SET GAP
PRIMARY
.006
WIRE
.010
(.152 mm)
(.254 mm)
SHORT
LONG
TRIGGER
PIN
TRIGGER
PIN
TIME
FLYWHEEL
PRIMARY
MAGNETO
WIRE
IGNITION COIL
ONE TYPE OF NON-ALTERNATOR
ONE TYPE OF NON-ALTERNATOR
IGNITION
IGNITION
FOUND ON VALVE-IN-HEAD ENGINES
FOUND ON 8 HP AND LARGER ENGINES
SPADE CONNECTOR FOR 20 AMP
IGNITION UNIT
CHARGING
COIL
GROUND
TERMINAL
NEW NON-ALTERNATOR
USED WITH 20 AMP
SOLID STATE STATOR
SINGLE MAGNET FLYWHEEL
TO C. D. I.
EXCITER
MODULE
COIL
TO SHUT OFF SWITCH
SCHEMATIC DIAGRAM
CHARGE
COIL
IGNITION BLOW-OUT PROTECTION
NOTE: THERE MUST BE AN ELECTRICAL
CONTINUITY FROM EITHER LEAD TO
BASE PLATE, BUT NO CONTINUITY IN
THE REVERSE DIRECTION OR BETWEEN
LEADS.
STATOR PLATE ASSEMBLY (20 AMP SYSTEM).
Previous tests also apply, except for the following:
1. Test the ignition unit first. If good, remove flywheel
and check coil for continuity.
2. Determine if correct flywheel is used, if previously
replaced. The flywheel used for a 20 amp system
is not compatible with flywheel used on a 10
amp systems.
3. The stator cannot be turned once secured with
stator bolts.
Page 47

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Hh120Hh80Oh120-180Vh100Vh80

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