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Begin OCR Text:
P F A U L T T R A _ l _ _
_ F A U L T _
_ CA US E
' _ RE M E DY _
The e_gine stalts or idlea very u_$venly
Fau Ity spark i ng pl ugs or sup pressors. Chec k and replace s parki ng p l ugs and sup-
pressors if necessary.
Ai r l e aks at carburettor conne ction . Chec k for tightness. Re place fau Ity g askets
l d l i ng speed too l ow. l nc rease i dl i ng speed. _
D i rt in carbu refto r. Clean carbu rettor, partic u larly id l i ng system .
E_gi_e ru_a jer_ily (or _ougfs) duri_g acc$leration
D i rt on spark i ng pl ug insu lators. _ Cl ean i nsul ato rs. _
Fau Ity sparki ng pl ugs. _ Check o r re place sparki n g pl ugs .
D i rty, fau Ity or wet d istri buto r cap. Rem ove and c l ean or rep Iace.
Faulty or wet cab Ies. Check, c l ean o r repl ace cabl es . See al so
Part 3.
D i rt i n carbu retto r. Remove float chambe r and need le valve , c lean
th ese parts.
Fu el/ai r mixtu re too l ean. Check carburefto r settings.
Fau Ity fuel pum p s u pplyi ng too l ittle fue l . Check fuel pum p pressu re and capacity.
Lo_ engine output
Ai r c l eaner blocked . Fit a new pape r e l e ment o r new ai r c l ean e r
as the case may be. If an o i l-bath type ai r
cleane r is fitted, cl ean it. _
Poor q uality fu e l , too l ow octan e ratí ng . Check fuel g rade, use correct fu e l .
Fau Ity ig n ition tim ing setting. Adj ust i gnition tim i ng setting by us i ng strobo-
scope. S ee '' l gn ition setting' ' .
Fau Ity setti ngs on carbu rettor. Ch eck and adj ust carburettor setti ngs.
Faulty valve c learances . Ch eck and adj ust valve cl earance . _
Low com pression on a cyl i nd e r. M e asu re compress i on pressu re . l n th e case of
e Kcessively low val ues, rem ove cyl inde r head for
c l oser i nvestig ati on.
Piston bind i ng . Rem ove cyl i nder head for investigati on .
Bi nd i ng wheel beari ngs or faultily adj usted S ee Part 5.
b rakes. Knocking trom valve me_hinism
', Valve cl earan ce too l arge. _ Adj ust valve cl earances.
'_,,,,_ Wo rn or damaged parts i n valve m ech anism . _ R econd ition or repl ace parts whe re n ecessary.
I__' 2 - 4O
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