208
TROUBLESHOOTING
7. Turn the crankshaft by hand and set it at the posi-
tion where the intake and exhaust valves of No. 1
cylinder do not move, when the crankshaft is
turned 60˚ clockwise and counterclockwise.
(Set No. 1 cylinder to the top dead center.)
8. Select "Engine throttle valve open position (code
No. 15)" in the check mode of the board mainte-
nance functions. Then set the engine throttle valve
to 500-step position (fully opened position).
9. Supply valve cleaner into the gas mixer through the
mouth of the gas mixer for 20 seconds and wait for
10 minutes.
10. Cover all 4 plug holes with rag, and turn the crank
pulley by 1 revolution by hand.
11. Close the cylinder head cover with all plug holes
covered with rag. And select "Actuators output
condition/individual actuating (code No. 20)" in the
check mode of the board maintenance functions.
And turn ON "Main side output permission",
"Engine side output permission", "Starter trans-
former", and "Starter" in order so that the starter
can operate for 5 seconds to crank the engine.
12. Open the cylinder head cover with all plug holes
covered with rag. And turn the crank shaft by hand
and set it at the position where the intake and
exhaust valves of No. 4 cylinder do not move,
when the crank shaft is turned 60˚ clockwise and
counterclockwise.
13. Attach the cylinder head cover with 3 bolts.
14. Repeat steps 8. ~ 11..
15. Attach the spark plugs, air intake hose, and igniter
connector as before.
16. Remove the blow-by hose at the cylinder head
cover side.
17. Run the engine.
18. Supply 1/2 can of valve cleaner to the gas mixer
through the hose disconnected.
NOTE) Supply valve cleaner intermittently while mak-
ing sure that there is no engine stall or over
speed.
Take extra precaution while cleaning any parts with the engine running. There are possibilities that your fingers
or clothing could be caught by the crank pulley or other moving parts.
No.1 intake
No.1 exhaust
No.2 exhaust
No.2 intake
No.3 intake
No.3 exhaust
No.4 exhaust
No.4 intake
Front side
Rear side
Air intake hose
Valve cleaner
Gas mixer
Blow-by hose
Cylinder head cover
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