5
CARBURETION
CARBURETOR IDENTIFICATION
Tecumseh carburetors are identified by a model number
and code date stamped on the carburetor as illustrated.
When servicing carburetors the model and date code
number of the carburetor will be found on the carburetor
body. It is a recommended procedure to use the engine
model and specification number for looking up repair
parts. However, if they are not available, the carburetor
model number may be used for the proper carburetor
repair parts. Cross reference the carburetor model
number into a service part number using the Master
Parts Manual or Microfiche and look up the required
parts.
ALTERNATE LOCATION FOR
MANUFACTURING NUMBER
THROTTLE
SHUTTER
IDLE AIR
BLEED
MAIN AIR
BLEED
CHOKE
SHUTTER
INLET NEEDLE
AND SEAT
FLOAT
MAIN ADJUSTMENT
IDLE
ADJUSTMENT
MAIN NOZZLE
NOTE: EITHER JET MAY BE FIXED TYPE. (NON- ADJUSTABLE)
SERIES I OPERATION.
The HSK and HXL840-850
models use a Series ( I ) carburetor. (Fixed speed
models have no idle circuit with a fixed main jet.)
Variable speed engines use a full circuit Series I which
has an idle fuel circuit (as shown above).
SERIES VI OPERATION.
This carburetor is a high bred
of the dual system carburetor. It is equipped with a primer
for easy starting and has a fixed main and idle circuit.
Fuel fills the prime well in the bowl nut to the level
maintained by the float. Pushing the primer button 3-5
times will provide the rich mixture required to start a
cold engine. It takes about 3 seconds for the prime well
to refill after each prime.
If the engine is used under cool weather conditions, the
number of primes should be increased.
NOTE:
All Emissionized engines will be equipped with
fixed jet carburetors.
MANUFACTURING
NUMBER
CARBURETOR
DATE CODE
The TVS or TVXL840 engines use a Series VI
carburetor. The Series VI has a fixed high speed and a
fixed idle system.
IDLE MIXTURE
SCREW
HSK - HXL CARB
TVS - TVXL CARB
MAIN
MIXTURE
SCREW
SERIES VI
SERIES I
VENTED
PRIMER
BULB
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