XLS .15A AIRCRAFT ENGINE TROUBLESHOOTING GUIDE
This troubleshooting guide has been provided to help you diagnose and solve most problems that you may encounter with your XLS
series engine. Most problems encountered can be solved by carefully following the problem-cause-solution sections below. If you
cannot solve the problem using this troubleshooting guide, please feel free to contact us using the information below.
WARRANTY INFORMATION
All Magnum engines returned for warranty service must be within the warranty terms as stated on the warranty card provided with your engine. Do not return the engine
to the place of purchase. They are not authorized or equipped to perform warranty work on Magnum products. When requesting warranty service, please observe the
following guidelines:
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Always send the complete engine including the carburetor and muffler. The engine must be removed from the model.
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Include a note detailing the problem or service you are requesting. Service cannot be provided without this information. Include your daytime phone number in the event
we need more details pertaining to the service requested.
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You may request an estimate of services at the time you return your engine for service. An omission of this request implies permission for the Magnum Service Center
to service your engine at our discretion.
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Include a method of payment for any service charges. If not specified, the unit will be returned to you C.O.D.
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Send the engine to us by United Parcel Service, Federal Express or by Insured Mail. Postage is not refundable. Send to:
Global Services
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18480 Bandilier Circle
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Fountain Valley, CA 92708
Phone (714) 963-0329
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Fax (714) 964-6236
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Email: [email protected]
1) Engine does not start
A) Failed glow plug
A) Replace glow plug with new one
B) Glow starter not charged and/or faulty
B) Fully charge glow starter and/or replace
C) Engine not being turned over fast enough
C) Use an electric starter to start engine
D) Low speed needle valve set too lean
D) Reset low speed needle valve to factory setting
E) Old or contaminated fuel
E) Replace with new fuel
F) Engine flooded with too much fuel
F) Remove glow plug and expel fuel from cylinder
G) Faulty fuel tank and/or stopper assembly
G) Check and/or replace fuel tank assembly
H) Air leak in fuel system and/or engine
H) Replace fuel lines and/or tighten all engine bolts
2) Engine does not draw fuel
A) Air leak in fuel system and/or engine
A) Replace fuel lines and/or tighten all engine bolts
B) High speed needle valve fully closed
B) Reset high speed needle valve to factory setting
C) Low speed needle valve set too lean
C) Reset low speed needle valve to factory setting
D) Fuel lines kinked
D) Check and straighten fuel lines
E) Defective fuel tank
E) Replace fuel tank
3) Engine vibrates excessively
A) Propeller out of balance
A) Balance propeller
B) Engine and/or engine mount loose
B) Tighten engine mounting bolts
4) Engine does not transition
A) Failed and/or wrong type glow plug
A) Replace with new recommended glow plug
B) Old and/or wrong type fuel
B) Replace with new recommended fuel
C) High speed needle valve set too rich
C) Set high speed needle valve to leaner setting
D) Low speed needle valve set too lean
D) Set low speed needle valve richer
E) Low speed needle valve set too rich
E) Set low speed needle valve leaner
F) Air leak in fuel system and/or engine
F) Replace fuel lines and/or tighten all engine bolts
G) Propeller too large
G) Replace with one size smaller propeller
5) Throttle barrel does not
A) Throttle servo linkage out of adjustment
A) Adjust throttle linkage to close throttle barrel
close completely
completely
6) Engine overheats
A) Engine running too lean
A) Richen high speed needle valve
B) Cowl too restrictive
B) Open larger vents in cowling to allow air to exit
C) Wrong type of fuel used
C) Use fuel with recommended oil content
D) Engine not fully broken in
D) Allow engine further break-in time
7) Engine stops abruptly
A) Engine running too lean
A) Richen high speed needle valve
B) Piston and sleeve out of tolerances
B) Return engine to Global Services
C) Engine Overheating
C) See # 6 above
PROBLEM
CAUSE
SOLUTION
