Tecumseh TC Series User Manual

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4. Check the flywheel key for partial shearing.
5. Remove the muffler to check for excessive carbon build-up in the combustion chamber or exhaust port.
6. Inspect the intake gaskets, crankcase seals or gaskets for a leaking condition. Use a commercially available crankcase
pressure tester and follow the tester's recommended test procedure. See "Disassembly Procedure " in this chapter
for component removal.
ENGINE VIBRATES EXCESSIVELY
1. Remove the engine drive and check the attached equipment for an out of balance condition.
2. Check the engine mounting bolts, make sure they are tight.
3. Check the engine crankshaft on the P.T.O. end using a straight edge, square or dial indicator. Blades or adapters
must be removed. Any deflection will cause a vibration problem.
4. Check the internal engine for bearing roughness or wear, crankshaft bearing journal wear, or a worn cylinder or
piston.
LACKS POWER
1. Check the air intake for an obstruction (dirty filter, saturated filter, or other debris).
2. Check the exhaust for a restriction preventing proper exhaust flow.
3. Check the fuel / oil mixture for the gasoline being fresh and the proper amount and kind of oil used. Replace if
questionable.
4. Visually check the operation of the throttle, air vane governor, and choke (if applicable) for restrictions preventing
proper movement.
5. Check the carburetor for the correct idle mixture adjustment. Clean the carburetor if the problem persists see Chapter
3 under "Service".
6. Inspect the intake gaskets, crankcase seals or gaskets for a leaking condition. Use a commercially available crankcase
pressure tester and follow the tester's recommended test procedure. See "Disassembly Procedure " in this chapter
for component removal.
7. Inspect the engine cylinder and ring(s) for a worn condition using an inside micrometer or dial indicator.
8. Check the flywheel key for partial shearing.
SERVICE
GENERAL INFORMATION
TC engines do not have oversize pistons available. If the engine bore diameter exceeds the maximum engine specification
and new installed rings exceed the maximum ring end gap, a new shortblock or engine will be necessary. Engines built
with needle bearing P.T.O. main bearings have been upgraded to be serviced with P.T.O. ball bearing replacements.
Gaskets have replaced Loctite sealant between the engine cylinder and the crankcase. Crankcases that used Loctite
sealant between the cylinder cover and the engine crankcase have been upgraded to use an "o" ring in a machined
channel. Engines requiring replacement of the cylinder, cylinder cover, crankcase, or piston and rod assembly may
require the replacement of the short block or a complete engine. Consult the Tecumseh Master Technician's Parts
Manual using the engine model and specification number for replacement part information.
DISASSEMBLY PROCEDURE
1. Remove the high tension lead boot from the spark plug by twisting and pulling.
2. Remove the spark plug using a 3/4" (19 mm) deep well socket.
3. Drain the fuel from the tank by sliding the fuel line clamp off the carburetor fuel fitting (TC type I) or fuel tank fitting
(TC type II), twist and pull the fuel line off and drain the fuel into an approved container.
CAUTION: DRAIN THE FUEL INTO AN APPROVED CONTAINER OUTDOORS AND AWAY FROM ANY OPEN
FLAME OR COMBUSTION SOURCE. BE SURE THE ENGINE IS COOL.
4. Remove the two hex nuts on the carburetor studs and remove the air cleaner assembly. On TC type II engines,
remove the two screws on the filter cover, the filter element(s), and then the two hex nuts on the carburetor studs. If
the carburetor stud loosens; try retightening the hex nuts first, then loosen the nuts.
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Tecumseh TC Series Specifications

General

Brand	Tecumseh
Model	TC Series
Category	Engine
Language	English