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CLEAN COOLING SYSTEII -
Grass, chaff or dirt may
@d
the air cooling system,
especially after prolonged service cutting dry grass. Yearly
or every 100 hours, whichever occurs first, remove the
blower housing and clean the areas shown -to avoid over-
speeding, overheating and engine damage. Clean more
often if necessary.
DANGER: Periodically clean muffler area to remove all
gr a ss , d ir t a n d co mb u s ti bl e d ebr i s.
SPARK PLUG -
Clean and reset gap at .030" every 100
hours of operation.
CA UTI O N: Do n ot b l a st c l ean s pa rk pl ug . S p ark p l ug
s h ou ld b e cl ea n ed by s cr ap in g or wi re br ush i n g a nd
washing with a commercial solvent.
Spa r ki ng c an o cc u r if wi re ter mi na l doe s n ot fi t .fi rml y o n
spa+t< ptusi or if stop switetr+ib+ates agai+st spark plug.
Reform terminal or repair switch if necessary.
REMOVE COMBUSTION DEPOSITS every 100-300 hours
of o p er a ti on . Re mo ve cy l in der hea d a nd c yl i nde r he ad
s h ie ld . S cr a pe a n d wi re br us h th e co mb us ti on d epo si ts
fro m cy lin d e r, cyl in de r h ea d, to p of p is to n a n d ar oun d
valves. Use a soft brush to remove deposits. Re-assemble
ga sk e t, c yl in de r he a d a nd cy l in de r he ad shi el d. Tu rn
screws down finger tight with the three longer screws
aro u nd t he e xh a u s t v al v e, i f s o equ ip ped . T orq ue cyl i nde r
head screws in a staggered sequence to 140 inch pounds
(15 .8 2 Nm) .
SP A RK A RRE S TE R E OUI PPED MUF F LER -
l f e ngi ne
en asse mbl Y ,
remove every 50 hours for cleaning and inspection.
Re p la ce if da ma g ed .
ADJUSTMENTS
CARBURETOR ADJUSTMENTS
Minor carburetor adjustment may be required to com-
pe ns a te lo r d iffe ren c es i n fu el , te mpe ra tur e, al t i tu de or
loa d .
TO A DJUS T CA RBUR ETO R -
Tur n n ee dl e val ve cl ock-
w is e u n til it ju st clo s es .
CA UTI O N: V a lv e may be da mag ed by tu rni ng i t i n too f ar'
No w o p en n e ed le v al v e 17 2 tur ns c ou nte rc l ockw i se. T hi s
ini tia l a d ju st me n t wil l per mi t the e ngi ne to be sta rt ed and
w a rm ed u p p ri o r to fin al ad ju st men t.
FINAL ADJUSTMENT
Place governor speed control lever in "FAST" position.
Turn needle valve in until engine misses (clockwise - lean
mixture) then turn it out past smooth operating point until
eng ine runs un evenl y (ri ch mi xture) . Now t ur n need le val ve
to th e mi dp oin t be twee n r ich a nd l ean so t he engi ne r uns
smoothly. Next, adiust idle RPM. Rotate throttle counter-
clockw i se and ho ld agai nst sto p. Adj ust i dl e spee d
adj usti ng screw to ob tai n 1750 R PM . Re le ase t hr o tt l e -
engi ne shoul d accel erate w it hout hesi tat i on or sput t er i ng.
lf engine does not accelerate properly, the carburetor
shoul d be re- adj usted , usual l y to a sl i gh t ly r i cher m i xt ur e.
CONTROL ADJUSTMENTS:
Proper choke and speed control operation is dependent
upon proper adjustment of remote controls on the powered
equ ipm ent.
TO C HE CK OPE RA TION OF C HOK E CO N TR OL S:
Remove air cleaner. Move remote control leverto "CHOKE"
or " S TA RT " po sit ion . Ch oke sh oul d be f ul l y cl osed a s
show n. R epl ace ai r cle aner.
To Adjust:
Pl ace remot e co ntrol l ever on equ ipm ent in FA ST posi t io n.
C hoke o perat ing li nk " A" sho uld be j ustto uch in g be ll cr ank
l ever at " 8." See i ll ustr ati on.
S PE ED C ONT ROL AD JUS TME NT
Th e accept abl e opera tin g spe ed rang e is 1 800t o 3 600 R PM .
l dl e sp eed i s 1750 R PM . T he ma nufactu r er of t he equ ip-
CLEAN O UT
CHAFF AND
DIRT
.0 3 0" (.7 6 m m)
FEEL ER GAUGE
C HOK E LI NK
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