Magnum XL .52RFS Operating Instructions Manual Download Page 7

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Revision 2 September 2009

lac

t p

arts

n b

e o

rde

red

dir

tly

fro

ur l

al M

gin

y re

tail

er.

your

hobby

retailer

does

not
stock

Magnum

engines,

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alley

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92708

Phone: (714) 963-0329 / Fax: (714) 964-6236

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XL .52RFS AIR

CRAFT ENGINE EXPL

ODED P

AR
TS VIEW

284070

281510

281
174

281
160

284265

281
160

284085

284267

284068

281507

281022

282004

284065

280109

280812

282408

281308

281307

281601

28061

281210

280416

281418

280709

280933

280935

280934

281
117

282002

280520

281417

280313

280210

281308

284092

284071

284069

281403

284067

284066

284086

282450

284063

282450

282309

282231

282202

282109

284064

282407

282606

282002

281903

284206

281901

281
166

282450

281803

281804

Carburetor

Assembly (Complete)

280010

282501

282004

282501

282004

282501

284062

ER #

REFERE

nc
E #

RIPTI

280010

52801

Carbureto

r Assembly - Complete

280109

52601

Muffler

Assembly - Complete

280210

52228

Propeller

Nut, Safety Nut, and W

asher

280313

52-A

Drive W

asher with W

oodruf

f Key

280416

52210

Cranksha

280520

52101X

Crankcas

28061

52102

Backplate

280709

52204

Connectin

g Rod

280812

52213

rist Pin with Retainer

280933

52231

Piston

280934

52232

Sleeve

280935

52236

Piston Rin

281022

52-N

Cylinder H

ead with V

alves

281
117

521
12F

Cylinder H

ead Gasket Set

281
160

80841

Lock W

ashers (2) (M3)

281
166

12862

Needle V

alve Seat

Assembly

281
174

80719

Rocker

Arm Retaining Bolt (M3 x 16mm)

281210

521
11

Backplate

Gasket

281307

52134

Carbureto

r Retaining Bolts (M2.5 x 20mm)

281308

12518

Inta

ipe

/ C

aft

er B

olts

2.5

x 8

)

281403

12109

Camshaft Ball Bearing

281417

52109

Front Ball Bearing

281418

521
10

Rear Ball

Bearing

281507

160120

Cylinder H

ead Bolts (M3 x 18mm)

281510

12122

Valve Cov

er Bolts (M2.5 x 12mm)

281601

40134

Backplate

Bolts (M3 x 8mm)

281803

12861

High Spee

d Needle V

alve with O-Ring

281804

12860

High Spee

d Needle V

alve

Assembly - Complete

281901

12833

Needle V

alve Detent Spring

281903

12847

Needle V

alve Seat Gasket

282002

12819

Fuel Nipp

le with Fiber W

asher

282004

121
14

Fuel Nipp

282109

52-B

Rotor Bolt

282202

12812

Throttle

Arm

282231

1281

Throttle

Arm Retaining Nut

282309

52-C

Low Spee

d Needle V

alve with O-Ring

282407

52816

Carbureto

r O-Ring

282408

52831

Intake Pipe Gasket

282450

12845

O-Ring for Needle V

alves and Pushrod

Tubes

282501

137

Fiber W

asher for Fuel Nipple

282606

52-D

Idle Stop Screw with Spring

284062

52218

oodruf

f Key

284063

52-E

Pushrod Set

284064

52-F

Intake Pipe

284065

52-G

Exhaust Pipe with Cinch Nuts (2)

284066

52-H

Intake V

alve Set

284067

52-J

Exhaust V

alve Set

284068

52-K

Rocker

Arm

Assembly - Complete

284069

52714

Camshaft

284070

FS5271

Valve Cov

er (Blue)

284071

52-M

Camshaft Housing Cover with Bolts

284085

80517

Rocker

Arm Retaining Clip

284086

52729

Camshaft Followers (2)

284092

52732

Camshaft Cover Gasket

284206

12830

Needle V

alve Seat

284265

121
18

Rocker

Arm Lifter Nut (M3)

284267

80724

Rocker

Arm Lifter Bolt

Summary of Contents for XL .52RFS

Page 1: ...he engine is running l If you need to carry your model while the engine is running be conscious of the spinning propeller Keep the aircraft pointed away from you and others at all times l Do not use a tight fitting cowl over the engine It can restrict air from flowing over the engine which could result in engine damage from overheating For proper cooling the total cowl air exit area should be 30 g...

Page 2: ...during flight Idle Stop Screw and Rotor Bolt The idle stop screw adjusts the closure of the throttle barrel idle speed We recommend adjusting the idle stop screw to allow the throttle barrel to close completely This will allow you to adjust the idle speed via your transmitter therefore you will need to set up your transmitter throttle trim lever to keep the engine at a low idle when the trim lever...

Page 3: ...ckwise direction When using an electric starter it is not necessary to prime the engine The starter turns the engine over fast enough that the engine draws fuel on its own Priming the engine prior to using an electric starter can cause the engine to hydro lock flood Turning the engine over with an electric starter while the engine is flooded can cause extreme damage to the engine and or cause the ...

Page 4: ...etween a 200 300 rpm drop q 3 With the engine running at full power carefully lift the nose of the aircraft about 45º into the air The mixture should not become too lean but you may hear a slight increase in rpm If the engine sags or loses rpm when you hold the nose up the mixture is too lean If this is the case slightly richen the mixture and follow the test once more IMPORTANT Rpm will increase ...

Page 5: ...underbolt HP Glow Plug Product Number 115480 The Thunderbolt HP glow plug is designed specifically for four stroke engines and produces low idle speeds smooth transition and cooler running temperatures The glow plug is also very durable and able to withstand repeated use day after day Propeller APC 12 x 6 Propeller Product Number LP12060 We have found that XL RFS series engines run best using APC ...

Page 6: ...e 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 Use propeller within the recommended size range H Valves out of ad...

Page 7: ...0 80841 Lock Washers 2 M3 281166 12862 Needle Valve Seat Assembly 281174 80719 Rocker Arm Retaining Bolt M3 x 16mm 281210 52111 Backplate Gasket 281307 52134 Carburetor Retaining Bolts M2 5 x 20mm 281308 12518 Intake Pipe Camshaft Cover Bolts M2 5 x 8mm 281403 12109 Camshaft Ball Bearing 281417 52109 Front Ball Bearing 281418 52110 Rear Ball Bearing 281507 160120 Cylinder Head Bolts M3 x 18mm 2815...

Page 8: ...ard the front of the engine of the 6 o clock position q 4 Reinstall the camshaft housing cover RESETTING THE TIMING MAINTENANCE Engine maintenance should be done on a regular basis to ensure that you keep the engine running in top form especially over time Following these simple maintenance practices will ensure the long life and dependability you expect from your engine l Avoid running the engine...

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