Suzuki LT-4WD 1990 Service Manual page 257

S E R V I C I N G I N F O R M AT I O N
8- 1
T R O U B L E S H OO T I N G
E N G I N E
Com p l a i nt
E ng i ne w i l l n ot start C o m p ress i o n too l ow
or i s hard to sha rt.
2 .
3 .
4 .
5 . Worn-d ow n cy l i nd e r bore.
6 .
7 .
P l u g n o t s p ar k i n g
1 .
2 .
3 .
4 .
5. Defect ive ignition co i l
6 .
N o f u e l reach i n g t h e carbu reto r
1 .
2 .
3 .
4 .
1.
5 . C l ogged f u e l fi Iter.
E n g i ne sta l l s easi l y .
2 .
3 .
4 .
4 .
6 .
7 .
N o i sy engine.
E xcess i v e valve c h atter
1 .
2 .
3 .
N o ise appears to come from p i ston
1 .
2 .
3 .
4 .
N o i se see m s t o c o m e f r o m ti m i ng c h a i n
1 .
2 .
3 .
N o ise seem s t o come from c l u tch
1 .
2 .
3 .
4.
5 . C l utch d a m pers weakened.
N oise see m s to c o m e f r o m cr an ksh aft
1 .
2 .
3.
Sym ptom a n d possi b l e causes
V a l v e c l earance out of adj ustment.
1 .
Worn valve gu ides o r poo r seat i ng of v a l ves.
V a l ves m i sti m i ng.
P i ston r i ngs excessive l y worn .
Poo r seat i n g of spark pl ug.
Starte r m otor cra n ks too s l o w l y o r does not t u r n .
F o u l ed spark p l ug.
Wet spark p l u g .
Defective magneto.
D efect ive C D I u n it.
O pen or short c i rcu it i n h igh-te n s i o n cord .
C l ogged fuel ta n k vent h ose.
C l ogged or defective fuel pu m p .
D efective carbu reto r f l oat valve.
C l ogged fuel p i pe.
F ou l ed spark p l u g .
D efect ive magneto .
D efective C D I u n it.
Defective f u e l p u m p .
C l ogged or defective fue l pu mp.
C l ogged j ets i n carbu reto r.
V a l ve c l eara nce out o f adj ustment.
V a l ve cl earance too l a rge.
Weak e ned or broken valve spri ngs.
Worn down rocker arm or rocker arm sh aft.
P i sto n or cy l i nder worn dow n .
Co m b u st i o n ch amber fou l ed w i t h carbo n.
P i ston p i n or p i sto n pin bore worn.
P i sto n r i ngs or r i n g groove worn.
Stretched ch a i n .
Worn sprockets .
Te n s i o n adj uster not work i ng .
Worn s p l i nes of cra n kshaft o r i n ner race.
Worn s p l ines of cou nte rsh aft o r h u b .
Worn teeth of cl utch p l ates.
D i sto rted cl utch p l ates, d r iven and d r ive.
Wo rn o r b u r nt bea r i ng.
B ig-end bea r i ng worn o r burnt.
Th rust cl earance too l a rge.
R emedy
Adjust.
Repa i r or repl ace.
Adj ust.
R e p l ace.
R e p l ace or rebore.
R etighten.
Consu lt "el ectrical
co m p l a i nts" .
Clean or repl ace.
Clean and d ry .
R e p l ace.
R e p l ace.
R e p l ace.
R e p l ace.
C l e a n .
Clean or rep l ace.
R e p l ace.
C l ea n or rep l ace.
Clean or rep l ace.
Clean.
R e p l ace.
R e p l ace.
Clean or rep l ace.
C l e a n .
Clean .
Adj ust.
Adj ust.
R e p l ace.
R ep l ace.
R e pl ace .
C l e a n .
R e p l ace.
R e p l ace.
R e p l ace.
R e p l ace.
R e pa i r or repl ace.
R e p l ace.
R e p l ace.
R e p l ace.
R e p l ace.
R e p l ace.
R e p l a ce.
R ep l ace.
R e p l a ce.