SKY Engines SKY 110 User manual

SKY 110
U
SER
’
S
M
ANUAL

2
TABLE OF CONTENT
1.0 INTRODUCTION
1.1 GENERAL WARNINGS
1.2 HOW TO PREVENT ACCIDENTS
2.0 USING DIRECTIONS
2.1 FUEL
2.2 ENGINE BREAK-IN
2.3 STARTING THE ENGINE
3.0 TECHNICAL SPECIFICATIONS
3.1 ENGINE ILLUSTRATION
3.2 TECHNICAL SPECIFICATIONS
3.3 ASSEMBLY OF SECONDARY COMPONENTS
3.3.1 SPECIAL ASSEMBLY INSTRUCTIONS
3.3.2 RADIATOR
3.3.3 MUFFLER
3.3.4 CLUTCH
3.3.5 STARTER
3.3.6 RODS AND SILENT BLOCK
3.3.7 SILENCER
3.3.8 LAMINAR BUNDLE
3.3.9 CARBURETOR
4.0 MAINTENANCE
4.1 CLEANING
4.2 TOPPING UP LIQUIDS
4.3 ADJUSTMENTS
4.4 SCHEDULE AND GENERAL RECOMMENDATIONS

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5.0 SPARE PARTS
6.0 WARRANTY
6.1 REQUIREMENTS
6.2 THE WARRANTY APPLIES TO
6.3 THE WARRANTY SHALL NOT APPLY TO
6.4 SPECIFIC INFORMATION
6.5 WARRANTY CERTIFICATE

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1.0 INTRODUCTION
Thank you for purchasing a SKY110 engine developed and
manufactured by SkyEngines.
If you require more information, have any questions or need to purchase
spare parts, please contact us by phone or e-mail using the contact
details printed on the cover.
Thank you for selecting SkyEngines and SkyEngines USA. Have fun and
sincerely hope you are and will be satisfied with your purchase.
SkyEngines S.R.L.
SkyEngines USA

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1.1 GENERAL WARNINGS
 SkyEngines / SkyEngines USA shall not be directly or
indirectly liable for the use of this engine, especially if it is
altered or tampered with by third parties.
 To avoid severely damaging the engine, MAINTENANCE
must be follow as specified in this manual. Carefully read
chapter 4.0 of this manual and follow the instructions
thoroughly.
 As you use the engine some of the secondary components
tend to deteriorate with time. Chapter 3.0 (paragraph 3.3)
illustrates the assembly procedures for these components.
 SkyEngines / SkyEngines USA shall not be liable for
damages caused by improper maintenance or incorrect
assembly, except for replacement of components covered by
the warranty. (If you are not sure how to perform maintenance
or how to assemble the unit, please contact us and we will
gladly help you.)
 The engine has a maximum load capacity of 264-297 lb.
(120-135 Kg), meaning that it can transport a person within
these parameters. If you attempt to carry more weight it may
cause the unit to be out of balance resulting in an accident.
 Before each flight the pilot shall perform all inspections
required in order to verify that the engine is safe and in good
working order. (Inspection shall also be performed to the
frame, trike, quad or other means were the engine is to be

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used.)
 Any alterations made to the engine by the user or third
parties, are full responsibility of the user. Spare parts used for
such alterations are not covered by warranty. (Be advised
that any alterations or the removal of original parts may
jeopardize the safety of the engine.)
 SkyEngines reserves the right to change the engine models
and or the catalogue without warning and without any
obligation whatsoever. Further information is provided at
www.skyengines.com.
 Aircraft driven by this engine must be used in open spaces
only and in areas reserved for these activities. The pilot must
be aware of all the hazards connected with the use of this
engine and be aware that the engine can shut down at any
time.
 For detailed information on the warranty terms, see Chapter
6.0 in this manual.

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1.2 HOW TO PREVENT ACCIDENTS
 As the use of this engine can be very dangerous, it is
important to adopt all the necessary precautions during,
before and after each flight in order to avoid severe accidents.
We advise you to follow the general precautions below in
order to avoid damages and or accidents.
 The engine does not solve all flying problems; hence, it is
imperative to avoid risky moves. One of the most common
mistakes is flying at low altitude in areas without a safe
landing zone. It is important never to underestimate the
possibility of an engine failure.
 Always take into consideration that you may not have enough
thrust to clear an obstacle; better prevent and be at a safe
altitude before maneuvering close to an obstacle.
 Pay particular attention to swinging movements caused by
the change of trimming of your wing which can cause you to
fall 13-16 feet in altitude (4-5 meters).
 Always have a landing zone available in the event the engine
quits and an emergency landing is required.
 For your own safety, ALWAYS avoid flying over water in order
to prevent damage to yourself or the engine.

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2.0 USING DIRECTIONS
 The using directions provided in this manual refer to models
available at the time of print. Although the manufacturer is not
obligated to provide updates on changes, users may request
specific information on any upgrades of single products. For
more information visit www.skyengines.com or
www.skyenginesusa.com.
2.1 FUEL
 SKY110 is a 2 stage engine that employs a mixture of fuel
and oil.
 Always remember that a correct carburetion and fuel mixing
are essential to prevent the seizure of pistons fitted on any 2
stage engines, which are not covered by warranty.

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Note: Although Bardahl is a company based in the United States (HQ’s in Seattle,
Washington), as of July 28, 2016, they do not produce the 100% KTS Synthetic Oil
in the U.S.A., it is produced in Italy and Europe and hard to find locally. Make sure
you use a premium quality 100% Synthetic Oil for 2 Cycle Engines. SkyEngines USA
recommends that you use the Honda “Pro Honda HP2 Hi-Performance 2-Stroke
100% Synthetic Racing Oil”.

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DURING BREAK-IN
PERIOD 3% (1:32
*
)
AFTER BREAK-IN
PERIOD 2.4% (1:40
*
)
* Based on U.S. Gallons

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2.2 ENGINE BREAK-IN
 A good break-in ensures a long life of the engine and
enhances the performance of its components. Although you
may use your engine for flight during the break-in, it is
suggested that you perform the break-in for the first 3 hours
on the ground. However, if you do perform any flights during
the first three hours, use the engine very careful as the
internal parts are not well lubricated during that period. Also
make sure you follow the following procedures if you select to
do the break-in in the air.
 Do not use the engine at maximum power for extended
periods of time.
 Do not keep the accelerator in the same position of
several seconds; in this case it is preferable to open
and close the accelerator without increasing the altitude
in order not to force the engine.
 Use the engine for 10 minutes at a time, and then
allow cooling before the next flight.
 Repeat the same operation during the break-in for the
first 3 hours.
 As stated previously, although not a requirement, doing the
break-in of the engine on the ground it is the preferred
method. If you opt for this option, the following instructions
apply to you.
 Start the engine and make sure you do not exceed
5,000 RPM for the first 1.5 hours of engine running.
Also during this time, make sure you open and close the

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accelerator changing the RPM from low to high, again,
without exceeding 5,000 RPM for the first 1.5 hours.
 From 1.5 hours to 3 hours, follow the same procedure
but this time do not exceed 8,000 RPM. Again, do not
keep the accelerator in the same position for several
seconds, keep opening and closing it. This will ensure
all the internal parts benefit from the break-in.
THE BEAK-IN PERIOD CAN BE CONSIDERED COMPLETED AFTER
THE FIRST 3 HOURS OF FLIGHT OR GROUND BREAK-IN
PROCEDURES, OR AFTER THE USE OF 10 LITERS (2.2 GALLONS)
OF FUEL!
2.3 STARTING THE ENGINE
 The SKY110 engine is started by a manual starter. You must
strongly pull the starter rope. Be careful not to flood the
engine while doing so.
On your first flight of the day, or if the engine is cold,
always run the engine a few minutes after startup to heat
the engine. Accelerate at regular intervals to avoid
damaging it.

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3.1 ENGINE ILLUSTRATION AND PART NUMBERS
PART NAME PART NUMBER PART NAME PART NUMBER
1: CYLINDER SK006 11: IGNITION COIL SK033
2: RADIATOR CAP SK013 12: MUFFLER SK040
3: RADIATOR SK010 13: RADIATOR HOSES SK011/012
4: LAMINAR BUNDLE SK021/024/026 14: DRAIN RESERVOIR SK014
5: MUFFLER SEAL SK043 15: RADIATOR RODS SK017
6: HEAD + COVER SK007/008 16: GUARD SK001
7: WALBRO CARBURETOR SK019 17: SPIDER SK032
8: MUFFLER MANIFOLD SK045 18: MANUAL STARTER SK036
9: REDUCTION GEAR SK031 19: SILENT BLOCK SK015/016
10: SILENCER SK041

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3.2 TECHNICAL SPECIFICATIONS
TYPE SINGLE-CYLINDER 2 STAGE ENGINE WITH LIQUID
COOLING
SWEPT VOLUME 112cc
MAXIMUM POWER 26 HP @ 10900 RPM
MAXIMUM RATED SPEED 26 HP @ 11300 RPM
BORE 55 mm
STROKE 43 mm
REDUCTION MECHANICAL 1:4 OIL LUBRICATED
THRUST 72 Kg WITH TWO 125cm PROPELLERS @ 10900 RPM*
CARBURETOR WALBRO WG8
TOTAL ENGINE WEIGHT 13 Kg WITH LIQUIDS (28.66 Lbs.)
EGT 700° C (1292° F)
CHT 170° C (338° F)
MAXIMUM COOLANT
TEMPERATURE 95° C (206° F)
MAXIMUM CAPACITY MAXIMUM WEIGHT OF USER: 120-135 Kg (264-297
Lbs.)
CLUTCH DRY CENTRIFUGAL
* Test was made in optimal conditions at sea level and after running break-in.

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3.3 ASSEMBLY OF SECONDARY COMPONENTS
3.3.1 SPECIAL ASSEMBLY INSTRUCTIONS
The engine SKY110 is more complex than other models
and a higher level of experience is required to assemble
its components, specifically its internal ones. As the
engine is liquid cooled, the assembly of the components
that use the radiator’s coolant requires the
implementation of specific tasks that only a skilled
mechanic is able to carry out. Therefore all users who
are not specifically skilled or trained to perform these
operations SHOULD NOT WORK WITH THE ENGINE EXCEPT
FOR ORDINARY MAINTENANCE OPERATIONS, WHICH SHOULD
BE PERFORMED FOLLOWING THE DETAILED INSTRUCTIONS
SPECIFIED BELOW. DO NOT IMPROVISE OR ATTEMPT TO MAKE
UNAUTHORIZED CHANGES THAT COULD DAMAGE THE ENGINE
AND VOID THE WARRANTY.
Unauthorized changes could make the engine very
unstable.
Replace the components of the engine with original
SKYENGINES spare parts to guarantee reliable and
smooth operation.

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3.3.2 RADIATOR

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3.3.3 MUFFLER