TROUBLESHOOTING
ENGINE LACKS POWER
1 . Lightly accelerate engine
ENGINE SPEED INCR EASES
1
2.
Check ignition timing
CORRECT
�
3. Test cylinder compression
NORMAL
4.
Check carburetor for clogging
NOT CLOGGED
�
5.
Remove spark plug
NOT FOULED OR
DISCOLORED
�
6.
Check if engine overheats
NOT OVER HEATED
1
7.
Try rapid acceleration or
run at high speed
ENGINE DOES NOT KNOCK
1 8- 2
HONDA
NHBO
Probable Cause
ENGINE SPEED DOES NOT-----.!11> ( 1 ) Clogged air cleaner
INCREASE SUFFICIENTLY
(2)
Restricted fuel flow
(3) Clogged fuel tank cap breather
hole
(4)
Clogged muffler
INCORRECT---------•( 1 ) Faulty CDI unit
(2)
Faulty pulse generator
TOO LOW----------11Jo.( 1 ) Worn cylinder or piston rings
(2)
Blown cylinder head gasket
(3) Flaws in cylinder or cylinder
head
(4)
Faulty or deteriorated reed valve
TOO HIGH ----------•( 1 ) Carbon build·up in combustion
chamber
CLOGGED
----------•
( 1 ) Carburetor
not
serviced frequent·
ly enough
FOULED OR ----------11Jo.( 1 ) Plug not serviced frequently
DISCOLORED
enough
(2) Use of plug with improper heat
range
OVERHEATED----------..( 1 ) Worn cylinder or piston
(2)
Fuel air mixture too lean
(3) Use of improper grade of fuel
(4) Excessive carbon build-up in
combustion chamber
(5)
Ignition timing too advanced
ENGINE KNOCKS -------•( 1 ) Excessive carbon build·up in
188
combustion chamber
(2) Use of improper grade of fuel
(3) Clutch slipping
(4)
Fuel air mixture too lean
Date of Issue: May, 1983
© HONDA MOTOR CO., LTD.
Summary of Contents for NHSO aeroBO 1983
Page 1: ...D SHOP MANUAL NHSOaeroBO...
Page 61: ...ALTERNATOR 7 0 66 HONDA NH80 Date of Issue May 1983 HONDA MOTOR CO LTO...
Page 90: ...FINAL REDUCTION 9 0 96 HONDA NHSO Date of Issue May 1983 HONDA MOTOR CO LTO...
Page 98: ...CRANKCASE CRANKSHAFT 1 0 0 104 HONDA NH80 Date of Issue May 1983 HONDA MOTOR CO LTD...
Page 106: ...FRAME COVERS 1 1 0 1 1 2 HONDA NH80 Date of Issue May 1983 HONDA MOTOR CO LTD...
Page 143: ...FUEL TANK OI L TANK 1 4 0 154 HONDA NH80 Date of Issue May 1983 HONDA MOTOR CO LTD...
