Yamaha MZ360, Руководство по обслуживанию

Страница: 138 / 178

ENGINE SPEED IS UNEVEN
6-4
1
2
3
4
5
6
7
8
9
10
TR
OUBLESHOO
TING
ENGINE SPEED IS UNEVEN
THE BATTERY IS NOT CHARGED (Equipped models)
No. Checking steps Possible remedy
1 Check the fuel level. Add the fuel if it is insufficient.
2 Check if fuel has deteriorated. Replace the fuel.
3 Check if the fuel cock is clogged. Clean.
4 Check the spark plug for dirt and check the spark plug gap. Clean, adjust, or replace the spark plug.
5 Check the carburetor pilot screw turn out and float height. Adjust or replace.
6
Check if there is air suction from the carburetor joint, gas-
ket, or throttle shaft.
• Tighten the carburetor nuts securely.
• Replace the carburetor joint or gasket
with a new one.
7
Check if the slow or main passages such as, pilot jet and
main jet, in the carburetor are clogged.
Clean the parts.
8
Check the valve clearance.
(Refer to “ADJUSTING THE VALVE CLEARANCE” on
page 2-12)
Adjust the valve clearance.
9
Check the valve face and valve seat for wear.
(Refer to “VALVE” on page 3-37) Resurface or replace the valve face and
valve seat.
10
Check if there is seizure, wear, or damage on the piston,
piston ring, or cylinder.
(Refer to “PISTON, CAMSHAFT, CRANKCASE, AND
CRANKSHAFT” on page 3-44)
Rebore or replace.
No. Checking steps Possible remedy
1
Check the fuse.
(Refer to “CHECKING THE FUSE (Equipped models)” on
page 5-8)
Replace the fuse.
2 Check the battery.
• Clean the battery terminals.
• Recharge or replace the battery.
3
Check the charging coil.
(Refer to “CHECKING THE CHARGING COIL (Equipped
models)” on page 5-19)
Replace the charging coil assembly.
4
Check the entire charging system’s wiring.
(Refer to “CIRCUIT DIAGRAM” on page 5-1) Properly connect or repair the charging
system’s wiring.
5 The charging system circuit is OK. —