Sachs SA 290 Manual

TAKING DOWN THE ENGINE
Remove a ll connections from engine 10 frame or unit (cables. e lectric connections etc.).
Unscrew exhaust muffler,
i.
e. manifold a nd brocket.
Remove the engine and clean thoroughly before taki ng down.
Whe n giving the engine a general overhaul, components should be removed in the
sequence indicated.
Fig. 1
Fig. 2
6
Exhoust muffle r, corbure tto r ond
electri c starte r
Fig . 1
Screw dow n engine on Ihe as-
sembly jig
with 2 he)(090 n head
bolts M 10 )( 40, as shown in Ihe
adjoining ill ustration.
Re move intake
silencer (I).
Unscrew adapter flange cnd
la ke off cover plate (21 or un-
screw intake si lencer (Fig. 302,
p. 53) with cover p lale.
Pull off impulse pipe (4) .
Re move co rb urellor (3).
Re move ins ula ting sleeves and
insula ting flange.
If there is on intake stack be-
tween corb urettor and cylinder,
remove it only if necessary.
Unscrew electric starter.
Recoil starte r, starte r hu b
and fan
Fig. 2
Detach recoil slarter.
Unlod; nut in Ihe slorler hub (1).
Hold starler hub with retaining
lever (2, repai r too l no. 6), un-
screw the nut and remove starter
hub with spring ring and washer.
Nole :
In the case of the Fairba nks recoil starter re lease nut, hold starter hub with strap
spanner and unscrew nut.
I~
the case o f the. recoil starter wit h friction iows rele<lse nut, hold slorter hub with
pin spanner (repair tool no. 7) ond unscrew il.
Toke off storler hub with spring ring a nd washer.
Remove
th~
cylindrical pin and .the beorin!;! ro ller from the magneto flywheel (Fair-
banks reCOil starter) resp.
2
bearing rollers (recoil starter with fr iction jaws).
Toke off cover disc
(3).
Unscrew fan and remove gasket.
Cover plate and fan houl ing
Fig. J
Unscrew
fixin~
clip
(3)
for igni-
tion lea d (not
In
the case of 75 W
eq uipmen
t) a nd cover (1).
Detach leads a t termina ls 1, 2
a nd 3 of
the
term inal box {5} and
re move fan housi ng (4).
Note :
Re move cover flanges on fan
ho using for electric sta rt er con-
nectian, if f itted.
Take co re of dowel tubes.
Nole :
Remove short-circuiting button
only if necessary.
Remove ru b ber cop (2) and
short-ci rcuiting builon.
Detach short-circuiting lead from
insulato r.
Remoun l parts in reverse order.
Magnelo flywh eel
Fig. 4
Fit prote ctive cop (reroir tool no.
4) to threaded end 0 crankshaft.
Fit retai ning lever (1, repair tool
no . 6) 10 magneto flywhee l and
pull o ff the fl yw hee l by means of
the e xtracto r (2, repai r too l no.5).
Fig . ~
7