Filter
Top Products
Tractors,
Lawn
and
Garden
- 110
and
112
Engine
20
SM-2059-(Apr-67)
Piston,
Crankshaft
and
Flywheel
-
Tecumseh
35-5
Fig
.
9-Piston
Rings
with
Incorrect
End
Gap
Rings
of
the
wrong
size
or
rings
having
im-
proper
end
gap
cannot
conform
to
the
shape
of
the
cylinder.
This
results
in
high
oil
consump-
tion
and
excessive
blow-by.
This
could
also
be
caused
by
end
gaps
in
alignment.
Ring
end
gaps
should
be
staggered
on
the
piston
during
installation.
GR
OUV
E
EIIR
/
TO
P R I
iG
WEfl
P
/If
SS8()
Fig.
IO-Top
Ring
and
Groove
Side
Wear
Check
wear
of
ring
grooves
carefully,
espe-
cially
the
top
groove
.
The
top
ring
and
groove
are
exposed
to
most
combustion
temperature
and
presSure
as
well
as
airborne
abrasives
which
enter
the
combustion
chamber.
M S
Fig.
II-Piston
Rings
Stuck
and
Broken
Bccau.",
of
Lacquer,
Varn
i
sh
and
Carbon
Bui/d.Up
Any
condition
which
causes
the
engine
to
op-
erate
at
abnormally
high
temperatures
may
cause
varnish
and
lacquer
gum
deposits
as
well
as
carbon
deposits
to
form
in
the
piston
grooves
making
the
rings
stick
.
When
this
happens,
ex-
cessive
oil
consumption
and
blow-by
will
occur.
Engine
heating
and
ring
sticking
are
most
often
caused
by:
1.
Overloading
5.
Incorrect
oil
2.
Over-advanced
ignition
6.
Low
oil
supply
3.
Lean
fuel
mixture
7.
Stale
fuel
4.
Dirty
cooling
fins
Litho
in
U, S,
A.