Section 2. Charging Systems - Tecumseh HH100 Handbook

PRECAUTIONS
CAUTION: Electrical components of the 10 amp
alternator system are similar to the 20 amp alternator
system. Use care not to interchange electrical
components; severe damage will result.
A. Do not connect battery to cables in wrong polarity.
This will cause regulator-rectifier damage.
B. Break continuity between the regulator-rectifier
unit and battery when using a remote charger
on the battery. This will eliminate damage to the
regulator-rectifier if polarity is reversed.
C. Disconnect wiring harness at regulator-rectifier
before using arc welder on equipment.
D. Do not short alternator leads together.
E. When normally running the engine DO NOT
disconnect the lead to the battery.
NOTE: Only when testing the D.C. output, should
the D.C. output lead be disconnected from the
battery.
F. If wiring must be replaced in any part of the circuitry,
be certain the same size (gauge) wire is used.
Wire between the battery to the starter motor
must be a minimum of No. 6 gauge. For the 20
amp alternator system the charge circuit uses
No. 14 gauge wire. Most of the remaining portion
of the circuitry will be No. 18.
Newer 20 amp systems are distinguished by the
regulator-rectifier installed in the blower housing.
Connectors are not interchangeable with connectors
on the external type regulator-rectifier 20 amp system.
GROUND IS THRU MT'G BOLTS
STARTING MOTOR
SOLENOID
BATTERY
AMMETER
KEY SWITCH
OFF - MAGNETO TO GROUND ALL OTHERS OPEN.
RUN - MAGNETO OPEN, RECTIFIER BATTERY, BATTERY TO LIGHTS.
START - BATTERY TO SOLENOID.
10 AMP. ALTERNATOR SYSTEM
48

SECTION 2. CHARGING SYSTEMS

MAGNETO
A.C.
GROUND
A.C.
A.C.
BATTERY
GROUND IS THRU
MT'G SCREWS
LIGHT ETC.
SWITCH
SOLID STATE
RECTIFIER-
REGULATOR
Do not force or modify connectors. Test values are
identical to original 20 amp alternator system.
PRE-SERVICE CHECKS
a. Check for a good ground between regulator-rectifier
and mounting.
b. Check for poor connections or broken wires.
c. Check the fuse.
NOTE: Battery voltage must be above 6 volts for
the regulator to be activated. This applies only to
the 20 amp system with regulator-rectifier in housing.
SOLID STATE RECTIFIER
REGULATOR MOUNTED
ON ENGINE (PROVIDED
BY TECUMSEH)
GROUND IS THRU THE
MOUNTING BOLTS
ALL INDICATED GROUNDS ARE TO
ENGINE ALL GROUND CONNECTIONS TO
BE CLEANED TO A BRIGHT FINISH
SAFETY STANDARDS MAY REQUIRE AN
OVER LOAD PROTECTION DEVICE ON
BATTERY FEED SIDE OF SWITCH IN
ADDITION TO OR IN LIEU OF FUSE
SHOWN ON DIAGRAM
BATTERY RECOMMENDED MIN SIZE 32
AMPERE HOUR LARGER SIZE REQUIRED
FOR COLD TEMPERATURE OPERATION
50 AMPERE HOUR
20 AMP. ALTERNATOR SYSTEM
STARTING MOTOR
MAG. GROUND
(GREEN LEAD)
VIEW A A
GROUND IS THRU
THE MOUNTING
BOLTS
A.C.
AMMETER
KEY SWITCH
OFF - MAGNETO TO GROUND, ACCESSORY TO GROUND ALL OTHERS OPEN.
RUN - RECTIFIER TO BATTERY, ACCESSORY TO BATTERY. ALL OTHERS OPEN.
START - BATTERY TO SOLENOID. ALL OTHERS OPEN.
20 AMP. ALTERNATOR SYSTEM
MAGNETO SHUT OFF LEAD
VIEW A A
STARTING MOTOR
GREEN
SOLENOID
LIGHT ETC.
SWITCH
AMMETER
KEY SWITCH
A.C. (YELLOW
LEADS)
SOLENOID
GROUND IS THRU
MT'G SCREWS
LIGHT ETC.
SWITCH
A.C.
GREEN
VIEW B B
D.C. OUTPUT LEAD
RED
RED
FUSE
B+
VIEW F F
30 AMP FUSE