Suzuki Intruder 1978 Service Manual page 77

Engine Problem (Continued)
Engine develops power
loss or ru ns on one
cylinder (Continued) .
Engine overheats.
Engine backfires; has irregu -
lar running condition .
Note: Engine may eventually
overheat .
Engine four-cycles.
3-4 TR OUBLESHOOTING
Condition
4. Filter obstructed .
5.
Excessive ca rbon buildup
in exha ust portIs) .
6. Defective pulser coil.
7. Damaged or worn rings.
8. Low crankcase pressure .
9. Damaged piston .
10. Damaged head gasket.
11. Broken (shorted) high
tension leads .
12. Defective plug cap(s).
1. Incorrect spark plug(s).
2. Cooling fins obstructed.
3. Air leak between carbure-
tor and cylinders .
4 . Caburetor adjusted in-
correctly.
5. Excessive carbon deposits
in combustion chamber, ex-
haust port or muffler.
6. Damaged rings caused by
excessive carbon buildup.
7. Fan belt loose or broken.
1. High tension lead wire
shorting out.
2. Fouled or incorrect spark
pi ug (heat ra nge too hot).
3. Air leak between carburetor
and cylinder.
1. Carburetor incorrectly ad-
justed.
2. Dirt between needle valve
and valve seat.
Remedy
4. Clean or replace filter .
5. Clean exhaust portIs).
6. Replace pulser coil.
7 . Replace the rings.
8. Check crankcase for leaks;
replace oil seal or gasket.
9. Replace piston and related
component(s).
10. Replace gasket.
11 . Replace complete ignition
coil.
12. Replace cap(s) .
1. Install correct spark plug(s).
2. Clean cooling fins .
3. Replace gaskets, tighten
mounting hardware.
4. Adjust carburetor .
5. Clean affected components.
6. Clean or replace rings .
7. Adjust tension or
replace belt .
1. Replace complete ignition
coil.
2. Replace spark plug or in-
stall spark plug having colder
heat range.
3 . Check carburetor holder to
make sure it is not warped.
1. Adjust carburetor.
2. Service carburetor.