Fuel And Oil - Rotax 503 UL Operator's Manual

I
2) Foreword:
The ROTAX engine is an air-cooled z-stroke engine, Careful and extensively tested design andrugged
consEuction as well as the use of high quality parrs increaso reliabiliry and durabiliry, Wirh proper
maintenance and care and with the use of suitable fuel and oil dre engine should give you good service
for many years.
The ROTAX design incorporates the latest technical developments.In order to tate advantage of
futue developments we rcseNe rh e dghr ro make modifications in the ROTAX design without norice.
NOTE: All fasreners are metric with the exceptioo ofthe inter nal thread of the p.T. O_ cankshaft which
is 1/2 " narional fine ftread. It is to your advantage to read this manual carefully for the ptotection
of your engine. There may be sigrficant differ ences from othet types of fwo cycle engines you
may have worked on.
Always use genuine ROTAX pafis.
I A Neue. r,ra engine wirhout proper loading, e.g. corect propeller. Refer section 17.
Section 3
Fuel and oil:
Fuel coltamination is a najor cause of engine failure. The bestplace to avoid contamination is at the
source. Once in yoru fuel container', a very harz adous potendal edsts.
Use a clean safety approved storage corltainer. Filter all fuel entering and leaving this container. Do
nol over- conlainer. allow forexparrsion.
WARNING: Gasoline is flan]mable and explosive under certain conditions. Always perform pioce-
dDres in a well ventilated area. Do not smoke or irllow open flames or spaJks in tie vicillity.
Neve'r add fuel while engine is nuudDg.
Refer to teclmical data- The engine is desigded to operate a fuel fiitI.yJith 2 Ea oil. Beswetouse
ploducts of at least the standard shown in the technicfll data sectioD.
If the engioe is to be used inverted (with spark plugs pointing down) select a lubricant which features
low carbon deposits. Oil residue teids ro drain to low points, i.e. spark plug cavities. If rhis residue
fails to burn clean during normad operation, plug tbuling will occur, possible prc-ignirion also.
Manufacturers of suitable lubricanrs will guariurtee their products in writing.
Do not use fuel which has been storcd for a long period of time.
Do flot leave fuel exposed to sunlight in translucent containe$.
1)
A