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Magnum XL .25ARNV, Operating Instructions Manual

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Magnum XL .25ARNV Operating Instructions Manual Download Page 8

QUANTITY

PART #

DESCRIPTION

1

12114

Pressure Nipple

1

12811

Idle Mixture Screw Housing

1

12812

Throttle Arm

2

12819

Fuel Nipple w/Gasket

1

12833

Detent Spring

1

12845

Idle Mixture Screw O-Ring

2

12847

Gasket

1

25801F

Carburetor Assembly - Complete

1

25803F

Carburetor and Rear Needle Valve Assembly - Complete

1

25863

Carburetor Body w/Spray Bar

1

25874F

Rear Needle Valve Assembly - Complete

1

28101X

Crankcase

1

28102

Backplate

1

28103

Cylinder Head

1

28109

Front Bearing

1

28110

Rear Bearing

1

28111

Backplate Gasket

1

28112

Cylinder Head Gasket Set

1

28119

Carburetor Retaining Bolt (2)

1

28120

Muffler Bolt Set

1

28123

Cylinder Head Bolt Set

1

28134

Backplate Bolt Set

1

28203

Piston and Sleeve Set

1

28204

Wrist Pin

1

28210

Crankshaft

1

28213

Wrist Pin Assembly

1

28238

Drive Washer and Collet

1

28601

Muffler Assembly - Complete

1

28616

Muffler Axial Bolt

1

28810

Idle Mixture Screw w/O-Ring

1

32609

Muffler Gasket Set (2)

1

32814

Carburetor Barrel Spring

1

32832

Idle Stop Screw Set

1

32837

Rotor Bolt Set

1

40123

Rear Needle Valve Bolt Set

1

40228

Prop Washer and Nut

1

40816

Carburetor O-Ring

1

46845F

High Speed Needle Valve O-Ring

1

46861F

High Speed Needle Valve Only w/O-Ring

1

91137

Needle Valve Mount Gasket

1

S32868F

Carburetor Plug

To order replacement parts, visit your nearest

Magnum Engines dealer or call the Magnum

Service Center direct at 1-714-963-0329.
Parts are listed here in numerical order.

PARTS LIST

XL .28A

RNV

Summary of Contents for XL .25ARNV

Page 1: ...ect size wrench to tighten the propeller nuts Do not use pliers N Inspect the spinner propeller and propeller nut on a regular basis looking for any signs of nicks cracks or loosening N To stop the engine adjust the throttle linkage to completely close the throttle barrel and therefore cut off the air supply You can also pinch the fuel line to stop the engine but only if it is safely accessible Do...

Page 2: ...tor Use a screwdriver to carefully tighten both screws securely There is no need to overtighten the screws Note Do not overtighten the retaining screws The screws only need to be tightened enough to keep the carburetor from moving in the crankcase Overtightening the screws can cause severe damage to the base of the carburetor q Rear Needle Valve Installation The rear needle valve assembly is held ...

Page 3: ...ower the airplane sufficiently Using a propeller that is too small will cause the engine to run at too high an R P M Using a propeller that is too large will cause the engine run at too low an R P M and cause it to lug down too much In both instances this can lead to premature engine wear and eventual failure Propeller Size Recommendations q Glow Plug Recommendation Glow plugs can also make a big ...

Page 4: ...balhobby com MAINTENANCE q Avoid running the engine under dusty conditions If you are in a dusty environment we suggest using an air filter over the carburetor q At the end of every flying day purge the engine of fuel by disconnect ing the fuel line and allowing the engine to run dry of fuel q Use a high quality after run oil in the engine after you have purged the engine of fuel Inject the oil in...

Page 5: ...ce for heating the glow plug It uses a Sub C Nicad includes a meter to determine the quality of your glow plug and it also includes a charger to recharge the battery It s a very economical product to purchase and can be used with any engine that uses a glow plug q Motor Mount Hayes Motor Mount AL 25 011 The Hayes motor mount is a glass filled type that mounts to a ply wood firewall in the model It...

Page 6: ...Reset high speed needle valve to leaner setting D Idle mixture set too lean D Set idle mixture richer E Idle mixture set too rich E Set idle mixture 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...

Page 7: ...PARTS BREAK DOWN XL 28ARNV ...

Page 8: ...23 Cylinder Head Bolt Set 1 28134 Backplate Bolt Set 1 28203 Piston and Sleeve Set 1 28204 Wrist Pin 1 28210 Crankshaft 1 28213 Wrist Pin Assembly 1 28238 Drive Washer and Collet 1 28601 Muffler Assembly Complete 1 28616 Muffler Axial Bolt 1 28810 Idle Mixture Screw w O Ring 1 32609 Muffler Gasket Set 2 1 32814 Carburetor Barrel Spring 1 32832 Idle Stop Screw Set 1 32837 Rotor Bolt Set 1 40123 Rea...

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