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152 Tips
Troubleshooting
The items that are serviceable using this Manual
are followed by the page number reference
in parenthesis. The items that require use of
the Honda Service Manual are followed by an
asterisk (*).
POOR PERFORMANCE AT LOW AND UNSTABLE
IDLE SPEED
CHECK POSSIBLE CAUSES
1. Check if air
cleaner is over-
oiled (P.51)
CORRECT
INCORRECT
INCORRECT
LEAKING
CLOGGED
INCORRECT
LOW
WEAK OR
INTERMITTENT
SPARK
CORRECT
CORRECT
NOT LEAKING
NOT CLOGGED
GOOD SPARK
2. Check if the
connecting tube
and/or insulator
is leaking
3. Check carburetor
pilot screw
adjustment
*
4. Check carburetor
jets and accelerator
pump for clogs
5. Try spark test
*
6. Check the throttle
position sensor
*
CORRECT
7. Test cylinder
compression
*
<Over-oiled air cleaner
<Loose connecting
tube and/or insulator
band
<Damaged connecting
tube and/or insulator
<Improper pilot screw
adjustment
*
<
Contaminants in the fuel
<Not cleaned
frequently enough
(P.137)
< Faulty throttle position
sensor
*
< Ring worn
< Cylinder worn or
damaged
*
< Piston worn or
damaged
*
< Head gasket not
sealing
< Valve stuck open
<
Faulty, carbon or wet
fouled spark plug (P.61)
< Faulty ignition control
module
*
< Faulty exciter coil
*
< Faulty ignition coil
*
< Broken or shorted
spark plug wire
< Faulty ignition pulse
generator
*
<
Loose or disconnected
ignition system wires
< Faulty engine stop
button
ENGINE DOES NOT START OR IS HARD TO START
CHECK POSSIBLE CAUSES
heck the fuel
flo to carburetor
r spark test
;0'5&-*/'5&-4"/,
;-0((&%'5&--*/&02
'5&-'*-4&2
;4*$,*/('-0"46"-6e
;-0((&%'5&-'*--$"1
#2&"4)&245#&
; ault spar,1-5(
;
05-&%31"2,1-5(
; "5-49*(/*4*0/$0/420-
.0%5-&
; rok&/023)024&%
spar,1-5(7*2&
; ault e8$*4&2$0*-
; rok&/023)024&%
*(/*4*0/$0*-
; "5-49&/(*/&3401
b5440/
;003&02%*3$0//&$4&%
*(/*4*0/3934&.7*2&3
; "5-49*(/*4*0/15-3&
(&/&2"402
&34$9-*/%&2
$0.12&33*0/
; "-6e stuc,01&/
; o2/$9-*/%&2"/%
1*340/2*/(
;&",*/(%"."(&%
$9-*/%&2)&"%("3,et
;.1201&26"-6&4*.*/(
;&*:&%6"-6e
tart b follo7*/(
/02mal star4*/(
120$&%52&
; mproper choke
01&2"4*0/
;*-043$2&7*/$022&$4-9
"%+534&%
;/35-"402-&",*/(
;
.1201&2*(/*4*0/4*.*/(
"5-49*(/*4*0/$0*-02
*(/*4*0/15-3&(&/&2"402
;5&-$0/4".*/"4&%
; mproper hot start
01&2"4*0/
emo6&"/%
*/31&$431"2,1-5(
; arb52&402'-00%&%
; hok&$-03&%
; )2044-&6"-6&01&/
;*2$-&"/&2%*249
POOR PERFORMANCE AT HIGH SPEED
CHECK POSSIBLE CAUSES
1. Disconnect fuel
line at carburetor
and check for
clogging (P.41)
UNRESTRICTED
FUEL FLOW
FUEL FLOW
RESTRICTED
DIRTY
2. Remove air
cleaner (P.51)
AIR CLEANER
NOT DIRTY
s,ACk of fuel in tank
(P.41)
s#LOGGEDFUELLINE
(P.41)
s#LOGGEDFUELFILL
cap breather tube
(P.41)
s#LOGGEDFUELValve
(P.41)
s#LOGGEDFUELFILTER
(P.42)
s.OTCLEANED
frequently enough
(P.51)
CLOGGED
INCORRECT
LOW
WEAK OR
INTERMITTENT
SPARK
NOT CLOGGED
CORRECT
CORRECT
GOOD SPARK
3. Check carburetor
jets for clogging
4. Check valve
timing
5. Try spark test
*
6. Test cylinder
compression
*
s#ONTAMINANTSIN
the fuel
s#AMSPROCKETNOT
installed properly
s&aulty, carbon or wet
fouled spark plug
(P.61)
s&aulty ignition control
module
*
s&aulty exciter coil
*
s&aulty ignition coil
*
s Broken or shorted
spark plug wire
s&aulty ignition pulse
generator
*
s Loose or
disconnected
ignition system wires
s&aulty engine stop
button
s Ring worn
s Cylinder worn or
damaged
*
s Piston worn or
damaged
*
s Head gasket not
sealing
s Improper valve
timing
*
s6alve stuck open
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