Rotax 277 User manual

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OPERATOR'S MANUA L
TYPE 277 ENGINES
EQUIPPED W ITH
BOSCH CONTACT BREAKER
IGNITION SYSTEM AND
BING CARBURETOR
Edition: O3 1988
,l THIS I{ANUAL
CONTAINS
IMPORTANT
SAFETI
INFoRI1ATION
CONCERIIING
YoUR
ENGINE.
WITHTHN
EIIGINE
AT TIME OF RESALE.
AND MAINTENANCE
IT SHOULD
REMAIN

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I
SECTION
1. SAFETY
Inportant Preface, Genenal Safety Points
FOREWORD
FUEL I4IXTURE
Fuel & Oil, Mixing procedure
STARTINGPROCEDURE
Pre-start check, procedures . . .
BREA(-TNPROCEDURE
CARBURETION
INDEX
EXHAUST
SYSTEiIS ....,
INSTRUMENTS-HO}T&WHY
PAGE
a
a
f
4.
r
2
4
5
7.
8.
Carburetor, typical description 6
I
I
ICNITION SYSTEI.I
Ignition, Timing procedure 9
SPECIAL
OPERATION
CONDITIONS
FLoat flying, Alr systens, Noise reduclion , L2
MAINTENANCE
SCAEDULE
Posb Break-in inspection, Spark plugs,
rewlnd starter, cooling, engine tining,
carburetor aqjustnent, engine head torque,
engine nount cheqk, air and fuel filtration,
decarbonizing, storage ...... l,
TROUBLESHOOTJ}IG 18
SNGINE
REPATR
LOO ,........ 79
LIOHI'INO CIRCUIT 2T
WIRINODIAGRAI1 ..,... 24
TECHTIICALDATA ...,..25
customers' Infonnation 26
.i i
,ii
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10.
11.
14,
rt.
16,
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SECTION1
a - Never run Ene englne on
turning unless you are doing so
anyone or anything entering the
safe place is a detinite assel.
,al - Never leave your aircraft or other vehicfe unattended
whiLe the engine is running. If operated by soneone else you
could be sued even if the use was unauthorized by yoL,
| - X""p an engine log and.enter any unusual operation. Do
nob fLy unless you ltave corrected the problem ancl
recorded the
correction in !he toa,
I
I
IMPORTAi{T
PREFACE
Safety is everyone's business, l,lehave included sone of the
inportanb safety tips here, but the list is not complete. It would
be impossible to list every lray in which one nay be injured. We
would rather risk your indignation by mentioning that I'trhich every-
one knows is dangerousrithan take the chance that needless injury
could occur, Pfease note the following synbofs throughout the book:
A - Safety i,y'arning: Failure to obey a safety warning may
result in injury to you or others.
I - Intor.ation vltal to the operation or nalntenance of your
product (in aircpaft this should also be considered necessary for
safely ) .
GEJ.JERAL
SAFETYPOI}ITS
A - t't.,r"" mix fuel in an area that ls enclosed or vhere furoes
could reach an ignition point.
I - :'take
sure all engine controls are operative, thab you
know on and off posilrions of throttfe and ignition, that they
are. easily accessible, and that you can operalte then inslinctively
without hesitat ion.
,l - Never refuel an aircraft if fuet could be spilted on hot
engine conponents. Use safety approved. fuel containers and never
transport fuel in an unsafe manner.
l - Checkengine mounting system frequently as well as the
drive components, fuel lines, wiring, and fue-l and air fllters,
,ll - Checkfor luef conltamination, air vents, etc. Protect
engine while not in use fron any contamination entering exhaust,
fuel, or carburetion systen but be sure to renove storage protec-
tion before sbarting engine,
| - t'taintain your engine in top condition and assurne it's
going to quit running at any tine. Leave yourself an out in the
evenb of unexpected failure. the ground r"rith the propeller
in a run-up area and can observe
danger area. An observer in a
I
I

SECTIOi'I
FOREI.'ORD
Ihe ROTAXengine is an air-coofed 2 stroke engine, care-
ful and extensively tesbed design and ruBBed construction aa
well as the use of high qualj.ty parts warrant maxinum relia-
bilj.ty and durabifity. With proper naintenance and care and
wilh the use of suitabLe fuel and oil the engine will give
you trouble-free service for many yearg. The ROIAXdesign
incorporates the latest technical developnents. In order to
take advanta8e of luture developments we reserve the right
to makenodifications in the RotAXdesign r,rithout notice.
I ilote all fastenera are nebriq with the exception of the
internal thread of the P.T.O, shaft which is 1/2" national
fine thread.
It is to your advantage to read this ranual carefully
for the protection of you.rengine. There maybe extrene
differences from other types of two cycle engines you nay
e worked on.
Always use genuj"ne RoTAX
parts.
Never run engine wj.thout proper loading, e.g. propeLler.
SEC'TION
FUELANDOIL
Fuel conlraminati.onis a major cause of engine failure.
The best place to avoid contanination Is at the source, once
in your fuel container, a very harzadous potential exists.
Use a clean safety approved storage container. Filter
alL fuel entering and leaving this container. Do not over-fiLl
container, al1ow for expansion.
/l IIARNIN0: oasoline is flarunable and explosive under
serlain conditions. ALr{ays
perforn procedures in a well venti-
laled area. Do not amoke
or al-low open flahes or sparks in lhe
iniry. Never add fuel while engine is running,
Refer to technical data. The engine is designed to
operate at a fuel rnix ratio of 50 to 1, Desure to use products
of, at least the standard shownln the technical data section.
0
hav
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v1c
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- )-
If the engine is to be used inverted (with spark plugs
pointing down) select a lubricant which features 1ow carbon
deposits, OiL residue tends to drain to Lolr points, i.e,
6park plug cavities. If this resialue fails to burn clean
during nornal operation, plug fouling will occur, possible
pre-ignition also. I4anufactures of suitabfe lubricants will
guarantee their products in writing.
I4IXINCTROCEDURE
STEP
no.1: Using a clean approved
container of known volume
fi.11 correct amount of
i.nto container,
Oi1 must be approved for
cooled engines at 50 : 1
ratios.
STEP
no.2
iAdd fuel to obtain desired
mixture ratio (water nesh
fi.lter).
I FueI nusl be mininum
l,l.O.i.l.B, or R,O.N. 90 ocbane
rating.
Replace container cap and ahake
the container. Thoroughly
agitate the sonbainer. Then
using a funnel vribh a fine
roeahscreen !o prevent the
entry of witter and forej.En
particles, transfer mi
xture
fron container into the fuel
tanK,
o 1_L
air
ntx
STEP
no. l:
:=
a
=:
-e
-a

-q-
SECTION
4
STARTING
PROCEDURE
PRE-START
CHECK
Before starting engine read seclrion dealing with starting c
and engine break-in thoroughly, The service life of bhe engine
is largely deternined by howwelL you foLlow these insbructiona.
A Before starting engine be sure your installation is
conplete, secure and all contnols operate easily and smoothly,
that you can operabe them instinctively.
A.Iwaysensure that you are in a safe run-up area,
Ensure throttle linkage allows piston valve in carb to
bottom in i.dle position, Screw out idle speed adjustnent screw
(no,lo, pageT) until carb piston (no.J ) bottoms. Carefully turn
in adjustment screw until it engages piston and turn in a further
t + 3 1,/2 full turns.
Checkfuel line is connected and tank vent i6 oDen.
PROCEDURE
On cold engine apply choke ful1y. Leave throttle a! idfe
and
A
I
position. Opening throttle wi.Ll greatly reduce choke effect
resulting in hard starting. l4akesure ignition switch is on and -
you can shut ii off i.nstantly if necessary. Pull sbarber until
firnly engaged and then puI1 smartly through,
Aboveprocedure should be repeated unti.1 engine begins
to "fire".
As soon as engine starts, advance the throttle slowly to
Low speed and remove choke as soon as possible, ProLonged
use
of choke can cause engine to flooal.
If the engine fails to atant or operates only on one
cylinder, check vrhether the ignition wiring is dj.sconnected from
lhe spark plug protectors or fron the spark plugs.
Ensure shorting switch is in correct position and nired
correctly.
If preceeding checks do not correct the proble!n, renove
the spark plugs and inspect.
Wet spark plugs denote flooded engine. Replace with dry
plugs and renove choke. t
Dry rprrk pLugs indica!e no fuel in engine. fnspect tank
fuel Leve1, fuel valve and lank vent, Renove
float bor'/1and
ensure fueI is preient.

SECTION
5-5-
BREAK-
IN PROCEDURE
for aircraft inst al lation
(in obher applicalrions proceed accordingly)
The break-in has to be performed with the engine installed,
properly loaded. In case of an aircrafb, anchor the plane to the
ground. Run the engine according to the follolring graph:
FUU
5
q
t
2
0
10 15 20 f0
10 6o
50
lt0
l0
20
111111 11 2
I Be sure to use a safe run-up area, to anchor aircraft at
those points approved by the airfrane nanufaclrurer, and to have
someone
present lrho is able to shut off the engine instantty,
I Attu. this procedure the idle has to be adjusted. Then short
take-offs can be conducted. After a few short full-load take-offs,
but not later than 2 hours total running time, the cyfinder head
nuts have to be pe-torqued to 19:2q Nm(160 i 210 in.lb.). For
this prosedure the cylinder cowl (if any) has to be taken off,
F.nriha h[<t ha.^ld f^F ra-t^r^,,ih' ^f har.l
Tools: Screwdriver, insert 1l (socket l'rensh 1J), torque wrench.
Note: Use a cro6s sequence for tightening the nuts.
Consider both heads as one unib because they are joined by exhaust
and rnanifolds.
Ensure that cowl bolts are torqued less than head bolts.
IUnition point rubbing blocks wear rapidly durjng the first hours
of operation lil1 they I'potish in'r on the cam of crankshafi, therefore
bhe poiots gap may require adjustment after breal(-in (betw. 8.10 hrs)
I nufu" to ignition biming procedure. After inibial break-in adjust-
ment 1s perforrned, only normal nainltenance is required (see
maintenalrcescheduLe
)
.

-6-
SECTION6
CARBUNNTfON
The BIUG
carburetor is a piston type carburetor with
float chamber. -lhe carbJretor can be adjusted oy jet replace-
ment ofvarious approved sizes, by adjusting idle airlfuel
mixture screw, carb pision stop adjustr0ent, needle sjrzes,
and needfe clip posirjo.l, 'fhe a-irlfuet mixLLrre
at idle speed
is adjusted by the air adjusting screw (see ill. no. 28).
The idle r.p.m. is adjusted by the carburetor piston adjust-
ment screw (i11. no. JO)"
llote - theae idle adjustnents interact, so adjusting one may
require nlinor adjustment of the other.
must be in p.lace for proper carburetion. See section on
speciaL operating conditions.
r,-- "- -,,---d be done only afber al1 other
iteros have been checked, and tllen by an e{perlenced two-cycle
nechanic.
A Ensure that throttle qabfe and finkage do not sticl( and
that carb piston valve can be opened fuLly and cfosed to the
point where the piston adjustnent screr no. JO corltrols piston
opening and idle Rfl'l. t{inor adjusbments can be made ab cable
adjustment screw and lock no. 12 and no, 11,
Air intake filtration and noise reduction devices
tsecertain that throtile linkage is not affected by
engine or airfrane novelnent. This could change throttle
sett ings.
Special operating conditionsr suctl as severe clirnate
or altitude changenay require different jetting. Contact your
dealer.

-7-
BINC CARBURETOR
- TYPICAL DESCRIPTION
vindo, at carburetor piston
rru L d P4r
,3,{
.^E
'' l ll- ro
11-6 ',r -
/.".>-
| -,'ls
fr. e
33
Etecqtion: Hith
(Note: this is
13
16
)
,/\
,-::\
-24
29
39
I
,L
\.?
n
- 1-l
u
3
1
+11
i135
Vao
E34
P. 37
fl.
BING-double float
carburetor
carburetor hqusing
carburetor piston
j et need1e
h^l di ho n1atF
plastic spring cup
spring
cover p late
hex, s-crew
nex. nul
adj ustment screw
idler jet
needlo job
mixinB tube
float needle valve
cIj.p
float
float bracket
pin, float
gasKe
I
float charnbe r
O-
rin g
eir rofl,taiina q.rFU
spring' adjustment
b-.0 50
venL line
starti-ng piston with
gas
Ker
sleeve
oPr 4,,ts, r !4r L!16
plston
cfosure screw
starting piston with
gasKeE
oyr :r,E, J uar urIB
piston
cfosure Screw
Iubber cap
chol(e lever asEy.
hex, nut
lock washer 5
cyI, screw
MI(UNI-fue1 pump &!6y
ao---6\n-
f\l
ll41
142
43 t7- 3 A
^ -19
te-E -J,-zo
21
1) )!
<3
re
U*
37)
JB)
19)
qo)
lr1)
n)t
4rr)
11)
34
)
t)t
)a)
2
t
4
5
6
7
8
-910
11
7t
14
18
20
2I
22
2\
27
s
ctew
J0) adjustment screlr
4s!
q
gN
n-/rl "/ |
qP@
r,' I l-3
'tt

SECTION
7EXIIAUST
SISTEITS
Considerable effort has gone into the desi8n of the
ROTAXexhaust aystens. Any chan8esmay severefy deteriorabe
perforrnance, reliability, engine 1ife, fuel econolny,
and tlre
systen-s abil"ity to reduce noise to acceptabfe level-s. neware
of any accesso!'y systens that advertise an inprovenent over
the 6tock components.
I Vibration due to inproper nounting is any exhaust
system's worst eneny, Pnoperl"y mounted and maintained, your
exhaust system will provide a long service fife, Never renove
coupling spring with a sharp object or one which can nark the
spring naterial, A rounded screw-driver 6hank or a hook
fashioned fron 1/Il'r ban stock is ideaL. Safety-wiring of springs
is highly lecorunenaled.
SECTION
8
INSTRUI'IEI'ITS
- HoW
ANDWHY
Instrunents can be a valuabl.e addition if they are of
good quality, correctly instalLed, are tronitored, and the
igni.tion systen. Alternativefy use a tachometer operating on the
lighting coiL.
All instruroents requiring power source nust be overload , ...
protected.
All niring and sensor leads nust be properfy routed,
protected from vibrations and abrasion
The 277 engine is designed and tuned to operate at 6A50 +
6500 r.p,m., ful1 1oad, ful1 rrottte.
operator understands what they are te1llng him.
A Never use a tachorDeter wtrish can cause a short-cut on the

-9-
SECTION
9IGNITION SYSTEM
the ROTAXengine is equipped witlr a BOSCH
magneto generator
ot 12V 75/2JW rating, producing the current necessary for the
spark and accessories. The igniLion un.it has been seb to
precise tolerances by the factory. After initial break-in
adjustnents make no changes unLess absolutely necessary.
fn case of trouble observe the following I
If bhe icnition tails interuittently or if there are
other troubles that are due to neither spark pLug, nor external"
components, nor carburetor, the contact breakers nay be the
cause. Contacts must be clean and must not be burnt. i,,lith ner{
entines or nel.r
points bhe can-fol-lorrer of the ignition point
set wears rapidly initially. llesetting of contacts rnay
there-
lore be necessary al'ter sometime. The breaker contacts are
accessibLe after renoval of the renind starter and the startinB
pulley. The magneto
housing need not be renoved. onqe cam
follower has "polished in" and points are re-adjusted, sebtin8s
will trold Ior considerable time. lo check whether the ignition
tiriing :is correct, btrere is an arrow on the fan lrousing ehictl
corresponals to a fan bfade with a cast inarker as indicated.
fan l')ousing nark
I
I
fan blade mark

-10 -
+ihih^ f^E i--l+i^-
If adjustnent is necessary
alignment marks once the recoil
f <Fp il l',qtFqtsi^nl
l'he I'iring poinb for ttri8 engine
ston movenent
resp. 1B + 20o B.T.D.C.is .08 + .1r' B.'t,lJ.C,
crankshaft movenent.
At the point of alignment this indicates the correct
there is a further set of
starter nechanisn is removed
T
pi
r.q!'llTI9X TIMING ( procedure )
1) Disconnect spark plug wire and remove
plug.
2) Remove
engine cooling slrroud and recoil starter housing.
3) Rotate crankshaft untit breaker points (visible througb
magneto rin8) are ful1y oper!. Adjust point gap to
.072 ta .O75 inch using a feeLer 6auge and screw driver
as illustrated,
IIOTE: Breaker point gap can change upon tightenang,
Always recheck after tighten-inE,
4) Disconnect the rtouble lead wire from the ignition coit.
conneqt one end of a tining light (flastrlight type) or a tone
timer to the double lead i\'ire connection frorn the engine.

5) Turn timing instrunent on.
Rotate crankshaft until piston
JJ,I,IJIlg illill t!s dr. i rrrt, .tlle L1m1ng
II
-r5'rer YorJ
ture plate retainlng screws and
tining fluctuation a1ign, then
Insure that ignition switch is on.
approaches top dead centre and
light should fluctuate or tone
not, then sfacken the three arma-
rotate the plate ti1l nlarks and
retighten retaining screws.
loo early r turn arnature
plate c1oclo,rise
1I0?E: Timing may change upon tightening screids, Recheck anal
correct as necessarv.
Too late: turn arl:lature
plate count
er- clochwise
6) lJhencorrect tining is achieved,
ar'{ay
gap. The gap rnust be within B
(see illustration) when the rnarkon
mArl. ^h f.n h^rrqi hr
If the break-ar{ay gap is out of
may have turned on the crankshaft,
.tecessary,
check pole shoe break-
to 17 nm or 0,J to 0.67 irr.
ffywheel corresponds vrith
f^l6r.n.a flr6 fI u h6ol
Remove
flywheel alrd inspect
magnet
1) once conpleted, reconnect all wires,
and cooling shroud.
aoj
{s"
"age \./4
)<
shoe cardboard
striP
rep-lace recoif start er

-72-
SECTION10
SPICIAL OPERATII{GCOIJDITIOI{S
Float flying off water is a real pleasant experience -
usually. However, there are dangers to your engine you won't
experience on land. Someof these dangers are water ingestion
on take-off or landing due to spray and splash, conosion,
electrolysis, and worst of a1l unintenlional aubner:sion.
The hi6h carbon content of high quality bearings,
crankshaft ets., are highly succeptable to corrosion. Synthe-
tic o11s, although good lubricants, often attract noisture
-.th6n l-h.h ran6l il-
I A good quality air intake systen (i.e. K & ll oil
inpregnated filter) witl prevent most probleDs.
Dry
especiafly
choke the
result i.n
fiLter elements (paper type) are not acceptable,
in noist conditions. They will absorb water and
engine causing over rich carburetion mixtures whictl
ohdi ha n^uaP I ^sq
llote: Significant engine noiee reduction can be obtaineil
with an air intake silencer kit. Further: noise reduction may
be obtaj.ned by the use of an after-nuffler kit. Be aware lhab
modifications rnay require carburetor nodification. Enquire at
your dealer for nore infornation. Iloth are avai.lable in the
ROTAX
parts syst em,
I on aircraft equipped nith engine cowlings you nust
ensure blower inlet size is not restricted and exit is double
the inlet area. There should be no circulation between inlet
and exit on colrl"inB.

SECTION 11
I.{AlNTENANCESCIIEDULE
A ltlnltfltC l ft is recormrended
you have dealer assistance
periodically for components
or syatens not covered by this
nanual, Dlssonnect spark plug lead for all maintenance and
inspection procedures.
I Service tirnes are based on average use, assumi.ng engine
is run at least once per week for a normal duty cycle or average
flight. lotal time before tea!'downis determined by the frequency
and conditions of usage, If the engine is not goinE to be used
for a period of 7 to 10 days or nore, consult storage procedures
in this sestion,
Afber initiaf break-in period certain inspections and checks
nust be nade to ensure all cornponents have renained tight and in
tolerance. Failure to do so could lead to premature engine
failure. /
POBTBREAK-ININSPECTIONCHECKLIST
Engine tining
Spark pLug condition
Carburetor adjustment
Engine head nuts
Engine mounbnubs
l4uffler a!tachnent
Engine coolant syslem
Air filtration systen
Fuel filtration system
Electrical uiring (loose connections, stripped
wires, danaged
insulation), tighten all
loose bolts, nuts and linkage.
operatlon of Lighting system
lle recotnfiend
ihat you baye your dealer sign this ingpection.
Date of Break-in insoection narl6F o i r-rt,, F-

SPARK
PLUG
Due to varying fuel properties etc,, check every
10 hours of operation. Replace as required or annua1ly,
- providing spark plug heat range and the carburetor
calibration is correct, the spark pfug will have a brownish
tinge at the electrodes. A sooty spark plug usually indicates
a bad pfug or faulty ignition system i.n a sound engine. If
the plug is sooty wilh oi1 deposits, carburation and air system
slrould be checked.
If the plug has 'ruhite'r electrodes vrith rrmeLt'rdropl-ets,
first suspect lean nixture. If calibration is correct and
there is no evidence of uanifold leaks or lack of fuel, chan8e
the plug to a colder range. Do check if cooling systern ia
operating coryecbfy.
Al Attention: Heavy oi1 deposits on the electrodes and
insulator cause engine troubles and have to be removed
regularly (every 10 hours ) .
If, after cleaning or changing the spark plug, you stiLf
have an ignition problen and no external fault is found, the
ignition ul1it rrust be checked.(see seclrion under ignition
syslen),
I Never clean 2-cycLe spark
P6h6hh6F l-^ .^116^+ l t
-- --^ ^-- -^J gap
0,4 to 0,5 nrnor ,015 bo ,020
torqued to 27 l,ln
or 240 in.fb,
plugs with abrasive cleaners.
your plug with a wire gauge -
in. Spark pLug nust be
cg

rem
A
REl,lItlD STARTER
Cheqkcord condition every 10 hours. Replace whenworn
or frayed.
1o n.jrnr:F hrre <fArl-n F.no f.l lnw thp h"..-drrre Out-
lined (the nurnbersstated in brackebs refer to the illustration)
First renove the relrind starter assembly fron the engine,
.jecond, removetl'e snap rinC (9), toop sprin5 (B),
circlip (7), pawl ]ock (5), and ihe pawl (5).
Pu1l oub the starter rope fully to the end, hold fan
cowl (1) (resp. starter housing (1) on free air engine exe-
cution) and rope sheave (l) toBether in their position. There
is an opening in the rope sheave. The key clamp (4) visible
ih tl'a .n-rin- hrs to ho rrrqha,l ^rrf jn tha ^nr.<iia !ense Of
Fh- F,,rlir,..{in--.i^,, ]-,,ll t}F -^-- n'tt ^l iha F^ne slteave.
]'he insert the nei,{sbarter rope into tl)e rope sheave,
moun! the key clamp in the sane position as it was before and
oun| bhe parts 5, 5, 7, B, and 9.
l{arning: Do not rernove
spring container (2), this
hirhi- o.'rc6 i"','ri-.
IJo noL operate tl)c enline if tlre rev/inJ sbarter is
defective,
:Y:9
@
I
5

-16-
COOIII,IG
SYSTEII (applies to f,an-cooled engine version)
Inspect on an annual ba6is. Ensure no fan blade
danlage- check cowling is nou cracked or broken. Do not
run engine with cowlings renoved.
I Never torque cowling boLls hagher than head nuts.
I
@
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@@

EiIOINE TIi4Ii'IG
Should be inspected every 50 hours, Replacementis only
- required vrhen
breaker points can no longer be adjusted within
specifications,
. Procedure - see ignition systen section.
EiiGINEHOADIIUTS
once seated after break-in inspection they require only
annual check, For re-torquing, see break-in procedure,
ETiGIiJEJ1OUJ'ITiiUTS
Inspect visualfy regularly (pre-flight check). Re-torque
annually. Checkprocedure with airframe nanufacturer,
AIR FILTMTION SYSTEI'I
Inspecb frequently (10 hours) for cleanliness dependent
on type used (see special operation condibions),
FUELFILTRATIOI{SYSTEI4
Check every 10 hours al nininun (see fuel nixture).
Ensure clean fuel 3t alL times,
DECARBONIZIiIG
After approxinately 50 hours of use, the combustion chafiber
may require de-carbonizing, To inspect, renove exhaust socket.
and check for deposits on piston cro!{n, Clean if deposit-
thickness is in the range of .04 in.
Procedure: Remove
cylinder top cowling and head. Hold
cylinder in place by suitable means, Using a wood scraper,
the carbon scales on the corlbustion chamberof the cyfinder head
and on the top of bhe piston should be removed. piston at top
dead center. Reassemble
and re-borque head.
STO]iACE
If your engine is not going to be run for a period of
' 20 to J0 days or more, certain precautions nust be taken bo
protect the engine and fuel system from heat, direct sun,
, corrosion and the formation of deoosits.

The schedule belorr is a Buide for storage procedure:
A) I TEnITALElrGIr,lECOI'lPOirEl,tTS
I
Rehoveair filtration 6ystem, start engine and allow
to idle.
B) FUELSYSTEN:
Drain float chamber, r'enove fueL from tank - drain fuet
lines.
.1, Follow all safety rules and do not run for a prolonged
period above idle.
Using an oil-can, flood the engine by injecting oi1 through
tbe carburetor tilf the engine stal1s, then proceed with fuel
DJ - !c ur 4rrrf rrt).
AFTERSTORAGECHECX
Ensure all residue oil is drained or renoved by cranking
the engine, and spark plug is cLean and gapped. Iiefill
tank, purge fuel lines and carburetor float chamberof air.
Ploceed with starting engine,
SECTION
12 TROUBLE
SHOOTIIIC
Your nOTAXengine requires two essentials to run. Spark
and cgrrcct fuet/air nixture. The majority of probLens quite
often are a sinple fack of one or the other.
Organize yourself and follow a set pattern to elininate
sonponents to find your trouble.
Fuel - start by checking the supply (tank), fittings
(loose?), filter (ptuEged?), float charDber
(fouled?),
Spank - try new plug, If no spark, check ground wire on
coil, Enaure switches are not shorted.
Problems of a nore conplex nature are beBt left to a
ROTAX
engine technic ian.