OS 61 SF Engine Featured Engine: OS 61 SF

I have had people tell me that the future of power for RC airplanes lies with electric motors or gasoline engines. But I find that two stroke nitro engines are still a very effecient, reliable, and inexpensive way to fly medium sized planes. A sport flyer would be remiss not to consider two stroke nitro engines for power. Listed here are a number of preowned new and used options that might interest you.

BRAND SIZE RATING PRICE SKU DESCRIPTION
Enya 25 10 $50 9  
Enya 29 10 $50 8  
Evolution 46 8 $55 97  
Evolution NT 61 10 $90 99  
Evolution NT 61 10 $90 90  
Evolution NT 61 10 $90 98  
HB 25 8 $40 1  
HB 61 10 $80 13  
K & B 61 7 $40 59 Muffler is patched, but engine is great!
Magnum GP 65 9 $65 132 Engine bench run once.
Magnum XL 25 7 $40 49 One of a pair used on a P61. Carefully broken in and flown 8 times. Plane wrecked without effecting the engines.
Magnum XL 25 7 $40 48 One of a pair used on a P61. Carefully broken in and flown 8 times. Plane wrecked withuut effecting the engines.
MAGNUM XL 28 9 $45 41 Mounted but never run
Magnum XL 46 10 $60 50  
Magnum XL 52 10 $70 85  
Magnum XL 61 9 $65 93 Evolution muffler and OS carb. runs exceptionally well
Magnum XL 61 10 $75 94  
MDS 40 5 $25 jp5  
OS Max AX 46 8 $80 60 FX muffler
OS Max FP 20 7 $30 96  
OS Max FP 35 7 $40 89  
OS Mas FP 40 7 $40 91 Rear mounted needle
OS MAX FP 60 7 $65 82 Semico strap on muffler
OS Max FP 60 7 $65 81 Small chip out of the top of carb throat
OS Max FP 60 7 $70 46 Very easy to start.
OS Max FX 40 7 $50 44  
OS MAx FX 40 7 $55 45  
OS Max FX 61 7 $95 53 Runs like a fine machine.
OS Max FX 61 7 $100 58  
OS Max FX 91 7 $130 63  
OS Max FX 91 7 $125 67  
OS Max LA 40 7 $45 55  
OS Max LA 65 6 $65 71 Chipped fin reduced it to a 6 rating
OS Max SF 46 7 $55 65  
OS Max SF 61 7 $100 64 Ringed version
OS Max SF 61 7 $100 39  
OS Max SR 40 7 $50 61 New Ring
OS Max SR 60 7 $110 54 My best 60 engine new or used!
RJL 61 7 $95 70  
Super Tiger 45 7 $55 195 Made in Italy
Super Tiger 45 9 $75 191 New bearings
Skyward 60 1 $15 jp1 Crankcase is excellent. Some other parts included, but condition uncertain.
Thunder Tiger Pro 46 10 $85 73 Priced down to 9 because of light shelf patina
Thunder Tiger Pro 61 7 $75 142  
Thunder Tiger Pro 61 8 $85 140  
Thunder Tiger Pro 61 9 $90 71  
Webra 40 7 $50 75 performs like an #8, but used more than an #8. Semico strap-on muffler
Webra Speed 61 7 $65 79