This is the .15 cu in (2.48cc) 2-Stroke XLS
.15A
Aircraft Engine from Magnum Engines.

FEATURES: ABC cylinder construction, "A"luminum piston with a "B"rass
liner that is "C"hrome plated Dual ball bearing-supported crankshaft Dual needle
valve carburetor Dual bushing supported connecting rod Three year limited
warranty
INCLUDES: .15 cu in (2.48cc) 2-Stroke XLS .15A Magnum engine w/ muffler,
carb, drive washer, prop nut and washer and instruction manual
REQUIRES: Glow Fuel: break-in, 15% nitro with at least 18% lubricant
content after break-in, 15 - 30% nitro with at least 18% lubricant content Glow
Plug: Hot heat range plug designed for Two-Stroke engines Propeller: 8x4 for
break-in, after break in, 7x4,5 8x3,4 7x6,7 8x5,6 Misc Items: Plug wrench,
starter and field equipment
SPECS: Displacement: .15 cu in (2.486cc) Bore: 15.2mm Stroke: 13.7mm
Practical RPM: 2,500 - 18,000rpm Weight with Muffler: 6.8oz (193g) Distance
Between Mounting Holes Same Side: 0.43" (11mm) Distance Between Mounting Holes
Opposite Side: 1.2" (32mm) Width at Mounting Tabs: 1.6" (40mm) Height/bottom of
Mounting Tabs/top of Cylinder Head: 2" (50.5mm) Height/bottom of Crankcase/top
of Cylinder Head: 2.5" (63mm) Distance/Back plate to outer edge of Prop Washer:
2.3" (57.5mm) Distance/Backplate to end of Crankcase: 3.1" (79mm)
......... $64.99 + shipping/handling
This is the O. S. Max .15LA Engine with
Muffler.

FEATURES: One-Piece natural finish crankcase Non-ringed cylinder
construction Two Bronze Crankshaft Bushings (sometimes called oilite bearings)
Schnuerle Porting (Schnuerle scavenging) Side Exhaust Nylon Backplate with
Remote Needle Valve #10G carb with remote needle valve assembly
INCLUDES: Expansion-Style Muffler #871 .15LA Engine w/Carb Instructions,
Decal Sheet, and Warranty Card Two 2.6x23mm screws to bolt muffler to engine 1.5
inch length of fuel tubing for remote needle valve One #A3 glow plug
REQUIRES: Glow Fuel with 5-15% Nitromethane and 20% (minimum) lubricant
content Glow starter, plug wrench and field equipment
SPECS: Construction: Aluminum 1-Piece Crankcase, Piston, Cylinder Head,
Crankshaft, Connecting Rod, and Crankshaft. Nickel-Plated Brass Cylinder
Displacement: 2.49cc (0.1517 cu. in.) Bore: 15.2mm (.598") Stroke: 13.7mm
(.539") Horsepower: .41 BHP at 17,000 RPM Weight: 5 oz w/o muffler (6.5 oz
w/muffler) Length: 56.5mm (2.16") distance/backplate to front of drive washer
76.5mm (3.01") distance from backplate to prop adapter Width: 24.8mm (1.0")
width of engine neglecting mounting flanges. Distance Between Mounting Holes
Same Side: 14.4mm (.56") Distance Between Mounting Holes Opposite Side: 33mm
(1.29") Height: 61mm (2.42")from bottom of mounting tab/top of cylinder head
Crankshaft Thread Size: 5mm Recommended Props: Break In: 8X4 Trainer and Sport
Models: 7X5-6, 8X4-5 Practical RPM Range: 2,500 - 18,000 RPM
COMMENTS: This engine will work well with any of the following glow
plugs: A3, A5, or A8.
......... $64.99 +
shipping/handling
This is the O. S. Max .25FX Engine with
Muffler.

O.S. has Updated the .25 SF with this New High-Performance .25 FX.
This Engine may be used in Sport and Aerobatic Aircraft. The FX is Designed to
Use a Muffler or Tuned Pipe. Comes with a 2-Year Warranty.
FEATURES: Remote Needle Attached to the Backplate keeps fingers away from
prop Twin Ball Bearing-Supported Crankshaft Schnuerle Porting (Schnuerle
scavenging) Advanced Bi-Metallic Liner. This process uses a double layer of
plating material, rather than one thicker layer. This helps the metal to bond to
the cylinder, and is more durable. Also, the plating process is more consistent,
resulting in a more precise fit between piston and sleeve, for better
compression, longer life. Side Exhaust One-Piece Crankcase
INCLUDES: One Expansion Style Muffler One Set of Instructions, Decal, and
Poster One Assembled .25 FX w/Carb
SPECS: Displacement: 4.07cc (.2485 cu in) Bore: 18.0mm (.708") Stroke:
16.0mm (.630") Horsepower: .84 BHP at 18,000 RPM Weight: 248g (8.8oz) 10.8oz
w/muffler Length: 75.6mm (2.98") distance from the backplate to drive washer
Width: 30mm(1.18") width of engine neglecting engine mounting flanges 38mm
(1.50") distance between centers of the mounting holes Height: 75.5mm (2.97")
Crankshaft Thread Size: 1/4-28 Recommended Props: Pattern Flying: 9x5, 9x6
Pattern Flying if a tuned pipe is used: 9.5x5 Sport Flying: 9x5, 9x6, 9.5x5,
10x4, 10x5 Practical RPM Range: 2,500 - 19,000 RPM
REQUIRES: Long Glow Plug (O.S. #8 recommended OSMG2691) Fuel with 18%
(minimum) lubricant content and 5%-15% Nitromethane (All 5%-15% fuels we carry
meet these requirements)
......... $89.99 +
shipping/handling

Open B Complete
Combat Can. This can will boost your rpm's.
It fits the OS
.25FX, Magnum .25/.28XL, Webra .25/.28, Thunder Tiger Pro .25 and Enya .21cx
.....$35.00 +
Shipping/Handling

Open B Combat Can,
replacement can. Comes without a header....$8.00 +
Shipping/Handling