CPI GTR 50 Service Manual page 7

TROUBLE SHOOTING
TEST CYLINDER
COMPRESSION
NORMAL
7
COMPRESSION
CHECK CARBURETOR
FOR CLOGGING
8 CARBURETOR NOT
CLOGGED
REMOVE SPARK PLUG PLUG FOULED OR
9
CHECK OIL LEVEL
AND CONDITION
10 CORRECT ENGINE OIL
LEVEL
REMOVE CYLINDER
HEAD COVER AND
CHECK
11
SUFFICIENTLY
LUBRICATION
CHECK IF ENGINE
OVERHEATS
12 ENGINE DOES NOT
OVERHEAT
RAPIDLY
ACCELERATE OR URN
AT HIGH SPEEDS
13
ENGINE DOES NOT
KNOCK
LOSS OF COMPRESSION
CARBURETOR CLOGGED (1) CARBURETOR JETS CLOGGED
DISCOLORED COLORED
OIL DIRTY OR LEVEL
INCORRECT
INSUFFICIENTLY
LUBRICATED
ENGINE OVERHEATS
ENGINE KNOCKS
《2-3》
CPI MOTOR
(1)VALVE STUCK OPEN
(2) WORN CYLINDER AND PISTON RINGS
(3) BLOWN CYLINDER HEAD GASKET
(4) INCORRECT VALVE TIMING
(5) FLAWS IN CYLINDER HEAD OR
CYLINDER
(1) FOULED PLUG
(2) INCORRECT HEAT RANGE PLUG
(1) LEVEL TOO LOW OR HIGH
(2) CONTAMINATED OIL
(1) CLOGGED OIL PASSAGE
(2) POOR OIL PUMP DELIVERY
(1) EXCESSIVE CARBON IN
COMBUSTION CHAMBER
(2) INCORRECT FUEL
(3) SLIPPING CLUTCH
(1) WORN PISTON OR CYLINDER
(2) MIXTURE TOO LEAN
(3) INCORRECT FUEL
(4) EXCESSIVE CARBON IN
COMBUSTION CHAMBER
(5) LGNITION TIMING TOO EARLY
GTR50