SERVICE INFORMATION
HRR216PKA
2-8
Poor Engine Performance
• Install a new spark plug, and then
restart the engine.
• Check the carburetor for flooding.
• Replace the spark plug and retest.
• Check the ignition coil air gap (
).
• Check the ignition coil (
).
• Check the engine stop switch (
).
Check the valve clearance (
), and
then perform the cylinder compression
test. If the cylinder compression is still
too low, perform a leak down test.
If the air leak down test shows air
leakage, check the following as
determined by the test:
- Valve seat width (
- Valve face irregularly worn (
- Piston ring side clearance (
)
- Piston ring width (
)
- Piston ring end gap (
- Piston skirt O.D. (
)
- Cylinder sleeve I.D. (
Install the spark plug and restart the
engine.
Dry
Wet
Remove the spark plug and inspect
(
).
Good spark
No or weak spark
NORMAL COMPRESSION
Compression is
high >80 psi
Install a compression gauge in the spark
plug hole (
) and crank the engine
several times.
Install the spark plug in the plug cap and
perform the spark test (
).
Remove (
),
and clean the carburetor (
).
Check the choke butterfly with the
engine cold.
Choke closed
Confirm the fuel quality. If gasoline is
more than 30 days old, the engine may
perform poorly.
Fresh fuel
Drain the fuel system, and refill with
fresh gasoline.
Stale fuel
Check the valve clearance
(
), and then perform the cylinder
compression test.
If compression is still high (>80 psi), a
malfunctioning decompressor is the
cause (
).
.
Clean or replace the air filter.
Clean
Clogged
Check the air filter.
Compression
is too low
Choke partially open
Compression normal
Clean or replace the fuel filter.
Clean
Clogged
Check the fuel filter.
Clean or replace the spark arrester.
Clean
Clogged
Check the spark arrester (if equipped).
SERVICE BULLETIN #106 =>
Summary of Contents for HRR216PKA
Page 5: ...iv HRR216PKA NOTES...
Page 9: ...SPECIFICATIONS HRR216PKA 1 4 NOTES...
Page 45: ...MUFFLER HRR216PKA 5 2 NOTES...
Page 49: ...RECOIL STARTER HRR216PKA 6 4 NOTES...
