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20
Engine
Tractors,
Lawn
ancl
Garden
-
110
and
112
25-4
General
Information
-
Tecumseh
SM-2059-
(Apr-
67)
DIAGNOSING
MALFUNCTIONS
ENGINE
Engine
lVill
Nol
Crank
Transaxle
not
in
neutral.
Place
shift
lever
in
neutral
position.
Battery
discharged
or
defective.
Check
battery
condition.
Replace
battery
if
necessary.
Neutral-start
switch
and
bracket
loose
or
not
properly
adjusted.
Tighten
and/or
adjust
bracket
and
switch.
PTO
drive
engaged.
Disengage
clutch.
Defective
safety
switch(es).
Re
place
switch(es).
Loose
motor-generator
belt.
Adjust
belt
tension.
Broken
motor-generator
sheave.
Replace
motor-generator
sheave.
Defective
solenoid.
Replace
solenoid.
Loose
electrical
connections.
Ti
g
hten
eonnections
firmly.
Motor-generator
malfunction.
Check
condition
of
motor-generator.
Repair
or
replace
if
nec
e
ssary.
Engine
seized.
Ch
e
ck
engine
condition.
J:-'nffine
Cranks
But
Will
Nol
Start
Empty
fuel
tank.
Fill
fuel
tank.
Restricted
fuel
tank
vent.
l1eplace
cap
or
cap
gauge
assembly.
Fuel
shut-off
valve
closed
(valve
below
fuel
tank).
Open
shut-off.
Clogged,
restricted
01'
air
lo
ck in
fuel
line.
Clean
and
bleed
line.
Replace
line
if
necessary.
Litho
in
U.S.A.
Break
er
points
worn
or
pitted.
Check
condition.
Replace
if
necessary.
Spark
plug
fouled
or
pitted.
Check
condition
of
plug.
Clean
and
regap.
Replace
if
necessary.
Incorrect
spark
plug.
Install
proper
spa
rk
plug.
Battery
not
fully
charged.
Charge
battery
and
check
condition.
Replace
battery
if
necessary.
Loose
electrical
conn
e
ctions.
Ti
g
hten
connections
firmly.
Wire
leacls
not
properly
eo
nnected.
Connect
wire
leads
to
their
respective
tenninal.
High
speed
and
idle
mixture
neeelies
not
prop-
erly
3djusted.
Adjust
carburetor.
Faulty
condenser.
--
Replace
condenser.
Defective
ignition
coil.
Replace
coil.
Dirt
in
fuel
system.
Remove
fuel
system
and
clean
dirt
and
water
from
system.
Install
new
gaskets.
Install
carburetor
kit
if
necessary.
Frayed
wire(s)
causin
g
ground(s).
Repair
wire(s),
replace
if
necessary.
Valve(s)
open
(stem
sticking
in
guide).
Free
valve.
Clean
guide
and
valve
stem
if
necessary.
Fnf[ine
Slayts
Hard
Spark
plug
pitted
or
foul
ed.
Check
condition
of
plug.
Clean
and
regap.
Heplace
if
neCeSS31"y.