
ENGINE
AND
PROPELLER
'I
lrc ('licroli'c Arrow
II
int:orlinr:rtcs
;I
L.ycoriiing 10-100-('1(' tour
-
cylinder, direct drive.
iiclri?ti~it:~llvolilioscd fuel injected ellgine r;~tctf
:lt
200 liorse~iowcr
:it
,2700 RPM It is furnislied
with
;I
st;irt~*r,(10 ompcrc 14
-
volt :~lternator.slricl(icd ignition. vacuurii pt11ii1)
drive.
I'klel pump,
jrrcilh!ller govcrnor arid
:I
dry alltoniotivc type iliduction air iiltcr
i\
rct:ommcndcd overhat11
period of 1400 Iio\lrs is based or1 Lyt:orning servicc experience Operation hcyond the
rcc:omrnendsd timc is the decision of the olierator Sincc Lycoming from timc to time rcvises
tlic rcconi~iic~idedoverhaul period, thc owner sliotlld clicck tlic latest L.ycorning Service
lirstr~~ctionat his Piper dealer for the latest recommended overlisl~lperiod and for any
ailtlitional infomlation,
The aircraft is equipped with a Hartzell constant speed, controllable pitch propeller. The
propeller controlis located on the power quadrant between the throttle and mixture controls
A
mixture control lock* is provided to prevent activation of the mixture control instead of the
pitch control,
Tl~cexl~atlstsysteni is a crossover tylrc. wliicli rrduccs hack trrrssure and improves
~ri~It is coristrtrctcd c~itirelyof st;linless steel :,rid is oc111ipli1.d with dilnl muiflcrs
C;~hinIie;~t:111dwi~idsliicltldel-rostingarc provided by
:I
liratcr sliroud around the mirfller
4n
oil cooler is located
011
the forward 1owt:r riglit side oftlie tiruwall, with the air inlet for
tllc coolcr loc:~tcdon the riglit side of tlie bottom cowling
A
winterirt~tioliplate is provided to
rcstrict ;iir (luringwinter operation (SceWinterization in Handling and Servicing
)
Tlie i~idirctionsystem incorporates a Bendix RSA-SAD1 type ftrel injector. The injector is
b:~sedon the principle of diff rential pressure, which balances air pressure against fuel pressure.
Tlie regirlated fuel pressure establislied by the servo vslv'e when applied across a firel control
(jetting system) makes tlie fuel flow proportional to airflow. F'~relpressure regulation by tlie
SCNO
v;rIvt:
causes a minimal drop in fuel prcsstrre throlrgllout the metering system. Metering
pressure is riiaintained above most vapor forming coriditions while file1 inlet pressure is low
c~io~~glito allow use of a diapliragni pump. The servo system feature also cliecks vapor lock arid
associated starting problems
The servo regrrlation meters fuel flow proportionally with airflow and maintains the
rniuture as manitally set for all engine speeds The fuel flow divider receives metered fuel and
drstributes ftrel to each cylinder fuel nozzle
The fuel flow portion of the manifold fuel flow gauge is connected to tlie flow divider and
~nonitorsfuel pressure This instrument converts fuel pressure to an indication of fuel flow
in
g:rllons per hour and percentage of rated liorsepower
The alternate air source of the induction system contains a door that functions
automatic:~lly or manually
If
the primary soirrce is obstructed, tlie door will open
n~rtomatic:~lly
It
may be opened manually by moving the selector on the right side of the
cliradrant Tlie primary source sliould always be used for take
-
off.
Tlie pilot sliocrld rend and follow the procedures reconimended in the Lycoming Operator's
M:~iitlollor this engine,
it1
order to obtain maximum engine efficiency and time between engine
ovcr1i:r~rIs
I
*Serial nos '7535001 and up
AIRPLANE
AND SYSTEMS
REVISED:
JUNE
18,1974