1
Remove Cylinder Head
2
Prepare Cylinder Head for Removal
Before cylinder head can be removed external parts such as air
cleaner cover, fuel tank, oil fill tube and dipstick, blower
housing with rewind starter, muffler guard and muffler, air
cleaner, carburetor, carburetor control bracket assembly and
carburetor adapter or intake manifold must be removed.
3
Part No.
19413
Fig. 49 – Setting Tester
1.
2.
Inlet gauge set point
Outlet gauge needle
3.
Regulator adjustment
knob
Remove Rocker Cover
1.
2.
Remove four screws from rocker cover.
Remove rocker cover and gasket(s), Fig. 50.
Note: Any air leaks at connections or fittings of tester will
affect the accuracy of test.
10.
Listen for air leaking from cylinder head gasket, carburetor,
exhaust system and either crankcase breather or oil fill
dipstick tube.
Note: If a high flow of air is leaking from exhaust and
carburetor, make sure that piston is at TDC on
compression stroke.
•
•
•
•
Air flowing between cylinder and cylinder head
indicates that cylinder head gasket is leaking.
1
Air flowing from carburetor indicates air is leaking
past intake valve and seat.
1
Air flowing from exhaust system indicates air is
leaking past exhaust valve and seat.
Fig. 50 – Removing Rocker Cover
Air flowing from crankcase breather tube or oil fill
dipstick tube indicates air is leaking past piston rings.
1.
Screw
11.
12.
When test is complete, push regulator lock nut in and turn
regulator lock nut counterclockwise as far as it will go to
release pressure in combustion chamber.
Remove Cylinder Head
Remove cylinder head screws, cylinder head, push rods and
cylinder head gasket, Fig. 51.
Disconnect outlet hose from tester before removing from
spark plug hole.
Result
Reading is Green. A small
amount of air is leaking
from head gasket.
Replace head gasket,
then re-test.
Reading is Green
Minimum air leakage.
Look for other problems
that are not compression
related.
Reading is Green/Red or
Red, and all the air is leak-
ing from one component.
Look for a possible
problem with that
component.
2
1
Reading is Red, and air is
leaking from several com-
ponents.
Check that piston is at
TDC, on compression
stroke. If reading does not
change, look for problems
beginning with component
that appeared to leak the
most air. Re-test after re-
pair.
Fig. 51 – Removing Cylinder Head
1.
Cylinder head screws
2. Cylinder head
Compression
28
GTS 200
| Categories | Lawn Mower Manual, Parts and Accessories Manuals, Toro Lawn Mower Manual |
|---|---|
| Tags | Toro GTS 200 |
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| Language | English |
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