Engine Does Not Start Or Is Hard To Start - Honda 2003 NPS50 Ruckus Service Manual

ENGINE DOES NOT START OR IS HARD TO START

1. C"Mbutetor Inspection
Chect U1-e fuel flow to 'lhe-catbu r.cor .
,. fwl t�itdtlnfl tM cetbwd'or1
N O
VES
2 . SpatkTest
PttfOfm spark test.
t. tho � It goodl
NO
V£S - GO T O S T E P 3 .
3 . C')' l inder Compression lnsp&etlon
rest 1he cvtindes-compression.
11 the oompr� within apftlf1 t ll rloJ• 1
NO
Yt:S
4. EnQ: i M StMt Conc[tlon
Stott bv f o!J o wing the normal proODCkirc.
Oou the cnginct sta.rt but Uum JWp•'}
YES
NO
5. Spatlc Plug lnsf)cdion
Romow: end Inspect the spe.tk Di"'.
lo lflo __ ..
NO
YES
21-2
Clo-gged tueJ "OM or tuol rittor
S6t*inu float valve
CJoggcd fuel cap bNatbftr
•
ffulty fvo l pump
•
•
lo0$e or di!;conmtctad fuel pump
-
G O TO ST£P l .
F11ulty &part phlfil
Fooled .........
F -..<�ty ECM
Broten Of st'lorctd "*" plug
&oa:cn 5hottJd ignillion aol
or
��tty Ignition fW t
�lly lgnhion putto gtnWMOf
Faulty MQi� atop IWltcft
Loose
dltcoruto�ettd lgnltlon svttem wires
c.
V�Jvc. $ta.Kk ooon
Wem cy1;ncltr tnd pil;ton lingt
•
le2ting.tdlt.m•Ufd cylindlw htad gnk:et
· --
•
lmpropet .,6),.. tStnlng
GOTOSTEP.t.
-
..
C.orbwutar lnconoctly edjuotoCI
•
!nt;;•e
m<tnlf old leN!Ino
ignition
improper dm!ng
•
•
Cont-omlnoUid tueJ
s11 rt M1g •nrlchmeni .SE)
• Ft�ulty
- OOTOST£P ..
Aoooed c:e::buretot
Fwtty s1�ninv en�ne (SE) vatv.
Throttle valv9
op�m
Air cleanef dirty
lncorrecl &part plug 9"P
lncor..-c:t s-p;rtl plug noat fll'lge
..
Improper ignition timlne
lnc:oncct valvt1 cde.tJtonot adjuttmem
aystem wite
wtre
(faulty ECM or i g n m o n pul11t gonentorl
vai'Ve