Honda HRS216PKA Manual page 17

SERVICE INFORMATION
Poor Engine Performance
Confirm the fuel quality. If gasoline is
more than 30 days old, the engine may
perform poorly.
Fresh fuel
Check the air filter.
Clean
Check the fuel filter.
Clean
Check the spark arrester (if equipped).
Clean
Remove the spark plug and inspect
(P. 3-8).
Dry
Install the spark plug in the plug cap and
perform the spark test (P. 2-21).
Good spark
Check the choke butterfly with the
engine cold.
Choke closed
Install a compression gauge in the spark
plug hole (P. 2-16) and crank the engine
several times.
Compression normal
Remove (P. 7-1), disassemble
NORMAL COMPRESSION
and clean the carburetor (P.
Install the spark plug and restart the
engine.
2-8
SERVICE BULLETIN #106 =>
Choke partially open
(P. 7-3),
7-4).
HRS216PKA • HRS216SKA • HRS216VKA
Stale fuel
Clogged
Clogged
Clogged
Wet
No or weak spark
Compression is
high >80 psi
Compression
is too low
Drain the fuel system, and refill with
fresh gasoline.
Clean or replace the air filter.
Clean or replace the fuel filter.
Clean or replace the spark arrester.
• 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 (P.
• Check the engine stop switch.
See "CHOKE CONTROL SYSTEM
(ACS)" ON page 2-22.
Check the valve clearance
(P. 3-12), and then perform the cylinder
compression test.
If compression is still high (>80 psi),
inspect the starting decompression
system (P. 2-16).
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 (P. 9-20)
- Valve face irregularly worn
- Piston ring side clearance
- Piston ring width (P. 9-15)
- Piston ring end gap (P. 9-16)
- Piston skirt O.D. (P. 9-15)
- Cylinder sleeve I.D. (P. 9-15)
(P. 8-5).
8-5).
(P. 3-12),
(P. 9-10)
(P. 9-16)