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Magnum - MGMG2905 MGM210851 210851 032227029861 0032227029861
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Magnum XL52 RFS Blue 4-Stroke
Magnum XL52 RFS Blue 4-Stroke
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Mid Jun

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Tech Notes
This is the Magnum XL52 RFS Four-Stroke Aircraft Engine
with Blue Rocker Cover.


Aluminum piston, iron piston ring and steel cylinder sleeve for long
life and high power output
Dual ball bearing supported crankshaft and camshaft
Dual needle valve carburetor insures precise fuel/airflow metering
High-flow muffler
One year limited warranty through manufacturer (valid only for
engines purchased and used in the United States and its possesions


Magnum XL52 RFS Four-Stroke Engine with Muffler, instruction manual
and parts list


Fuel: For break-in, 10% 2-stroke airplane blend
For normal use, 15% 4-stroke airplane blend
Glow Plug: 4-stroke type
Break-in Propeller: 12x5, after break-in 11x7-8-9, 12x5-6-7, 13x4
Glow starter, fuel tubing and field equipment


Displacement: 0.52 cu in (8.53cc)
Bore: 0.90" (23mm)
Stroke: 0.83" (21mm)
Practical RPM: 2,000 - 10,500
Weight with Muffler: 15.7 oz (445g)
Distance Between Mounting Holes Same Side: 0.69" (17.5mm)
Distance Between Mounting Holes Opposite Side: 1.7" (44mm)
Width at Mounting Tabs: 2" (50.9mm)
Height from Bottom of Mounting Tabs to Rocker Cover: 3.2" (82mm)
Height from Bottom of Crankcase to Rocker Cover: 3.8" (96mm)
Distance from Backplate to Front Bearing: 2.7" (68.7mm)
Distance from Backplate to end of Crankshaft: 4.3" (109mm)

High Speed Needle: Turn in completely then back out 2-1/2 turns
Low Speed Needle: Do NOT adjust until engine is broken in. Hold carb
barrel open, turn needle screw counter-clockwise until it stops
then turn in clockwise 4 turns-this is the factory setting


Some Differences Between 4-Stroke and 2-Stroke Engines;
4-strokes are quieter.
4-strokes get better fuel economy.
2-strokes generate more RPM.
4-strokes generate more torque and will swing a larger prop.
4-strokes have a realistic sound, like a real aircraft engine.

jxs 8/31/09

– If you need more information, use these Magnum resources –
Email: service@globalhobby.net
Web Site: http://globalservices.globalhobby.com/
Phone: 714-964-0827
  Postal Address:

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Accessories Needed
This is the Magnum XL52 RFS Four-Stroke Aircraft Engine w/Blue Rocker Cover. FEATURES: Dual ball bearing supported crankshaft & camshaft, dual needle rear mount carb, dual bushing con rod, high-flow quiet muffler REQUIRES: 10% 2-stroke fuel for break-in, 15% 4-stroke fuel for normal running, glow plug, prop, glow starter & field equipment

Accessories for the Magnum XL52 RFS Blue 4-Stroke

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2.69   In Stock
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2.99   In Stock
 LXK134 Great Planes Ultra Precision Fuel Filter
Qty Discount Available
3.79   In Stock
 LXUM80 Duratrax Glow Starter C Battery
Qty Discount Available
7.99   In Stock
Limited Quantities
 LXCB28 O.S. Type F Glow Plug Medium Four Stroke
Qty Discount Available
8.99   In Stock
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8.29   In Stock
Subtotal for this Group of Accessories: 34.74  
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Primary Accessories   Building & Field Equipment Optional Accessories

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