Sachs SA 280A Repair Instructions

Decarbonizing the exhaust muffle r, cylin der and cy li nd er head
When dealing with complaints and repairs, th e following should be bo rne in mind:
In every engi ne a propor tion of the l ubrication oil is burnt and form s carbon wh ich,
in a
two-stroke engine, is deposited chi ef ly on the pi ston crown , in th e tran s fer port of
the cylinder a nd in the exhaust muffler . T he carbon should be removed after every
200 running hours, at the latest when t he e ngine perf o rmance drops or when, even
with c orrect carburettor se tti n g, the engi ne tends to fo u r-stroke .
Fig. 50
Exhaust muffler
Fig. 50
The exh aust muffl er cann ot be
dis mantled for cle anin g.
Carbon deposi ts may be burnt
off by heating the muffler to red
heat by means of a welding torch
or in a forge f ire.
I
No mod if i cations sho uld be mad e to the ex hau st mu ff ler, as any such alteration s
w
ill be detr i menta l to p erfo rmance, fuel cons umpti on and will incr ea se e ng ine
noi se. Mod ifi cations of a ny kind to the ex hau st mu ffler are in any case illega l
and constitu te a puni s habl e offence .
Cylinder head
Unscrew the cylind er head and remove the carbon deposits fr om the insid e of the
comb ustion chamber w it h a screwdr iver. Take care not to da mag e th e su rf ace of
the chamber .
Cylinder por ts
Place piston at bottom dead center .
Remove
carbon deposits in ex hau st port and t ransfer po rts with a screwdriver .
Caref ully plac e pi ston at top dead ce nt er and remove loos e carbon .
Piston
Carefu lly remove o nly the thick er ca rbon deposits (f la kes) fro m the pi st on crown .
Do not try to scrape the piston crow n to a br ig ht meta lli c condit ion .
32

Sachs SA 280A Specifications

General

Brand	Sachs
Model	SA 280A
Category	Engine
Language	English