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Chapter 3 Fuel and exhaust systems 67 
Torque wrenc h setting s Fuel  P\JlllP Inlet n'
Pari  R Fue! iniaclion syslem 
G ene ra l SyS1c'" Iype Idl e sp ce d CO "o,![ ull" Fu el p"mp rfelov(!ry (nHrHrl1lJlll) 
SyS1cn, P")~"'''U Fvcll,mk Co1P,lC '(y 
Torque wrenc h settings Fue l ,11,>1,,1.,,101 
W",m "p "'~11I1;,1O' 51<1,1 V,llvt: A\J~'h;"y i'" duvlC(! Air eh.""I>", Bal1)o I>ull~ Fuel d'SI"hu\or W",nl up '«!lul,l1or (MIO) W,llln·up rC(jul
PART A: CARBURETTOR SYSTEM 
Gener,,1 description 
TI", 1",,1 sy'>I<'1ll <;onSIS1$ of " reM moulI1ed fuel  wl1k. il {hilpluo1\Jn1 type 1",,1 1l"'''P d"v(JIl I,om the C,lIllSh
eJr.h COII~'Stll'!I 01 ,I hont pIpe nnd leson
S omn models !"ay he hlled wIth a p,llted vacuum switch (PVS) to p'eVUl1t fI"1  SpulS aud nllsl"'"0 OCCll""'\) when the enllllle is cold "lid flll"""'1 WIth hJlI or pMllJI choke. When the enuine IS cold (below 71 C  I i GO F» the I'VS IS closcd. In tillS cond,I'Oll. c;lIhurenor v,lClIllln IS ,'Pl'hed directly to Ihe d,st"lnilor V'J the Ilon·return v;)lvc. whIch "lIow~ (he va ClJllI1I Jdv,lIlee to IJc  milll1lolll1e( 1 lIntier <1cccieIJt.on. 
prc .. en ('''Uliat spots or mlsf""'\J  .... ·ho)lI the eng"'e h<1s re<1ched  liS norm;ll ope,mll1\J lemperJtllle Ihe PV S  I, open In tillS condltloll lhe C<1rbUle1l0' '5 connected 10 Ihe 
d ,s t"hu!Or  v.a lhe PVS. 
2 Rouline lll
AI the IIlIclv
Check and adjust the idling speed find mixture 1 Refel to Sect.on 12. 
Check condilion of fuel hoses 2 E>.n''''lle illl Ihc fuef hoses on the eng ine compartment and on the fu!:1 ""'k. for SIgns 01 leilkJge or eletellowt,on. 3 Che ck the secullty 01 
holtS 4 Rel"r to Sect,on 19 Jnel  t.ghlcn tile IIllet  I11J",101d bolts III the 
) 
s!:q uence  (jlvcn 
Renew the ilir filler element 5 D'$ coruWct lhe hauery. G Remove lhe twO nuts secullng the air cleaner lid nnd remov e tile 
N rn 16 to 20 
4 to 8 8!O 15 
'8 to 2 2 
1 8 to 2 2 20 to 27 38 to 45 20 to 2 4 
Ibl It 12 to 15 
3 to 6 6  to 11 13 to 16 
13 to 16 15w20 28 to 33 15 to 18 
1305<:h K ·JetfOnic COlltonnous inlCCllon !JOO .1. 25 rpm 1 25 I 0.2 930 a cc cvcry 30 scconds 5 f)5 I 0.25 kUI/crn' (789 I 36 11l1/on') 580 hlrc ( 12.7U
Nm Ih l It 32 to 38 24 10 28 7 to 10 5 to 7 
7 to 10 5w7 7 to 10 5 10 7 7w!l 5 10 7 
18 to 20 13 10 15 11 to 15 810 11 5 to 8 4 \0 6 
5 10 8 4 to 6 181020 13 t o 15 
hd . 0" I;>ter models the ltd  rnily  be secuted with sprong IJSleners. 7 LIlt Out the paper clement 
8 Cillelllily clc
Check  air cleaner  IClllpcril{(lrc control (whcrc (i{{cd) 11 By looking through thc main ,101 cle,llle' spout. nOle the pos'tlon 01 lhe 1I"1l v
F ig . 3 .1 
Air tamper
A 8 C 
VaC(I(lm mUlor FIlip valve I-IC<1I sensor 
o 1-101 all in",ke E Culd illl U!wh, 
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