INTRODUCTION

THE MAX-10LA,15LA,25LA have been developed to meet  the  requirements  of    beginners  and  sport  flyers.Of modern design and having a separate needle-valve  unit  mounted  at  the  rear,  where  manual  adjustment  is  safely  remote  from  the  rotating  propeller, they offer the advantages of reliability and  easy  handling,  at  lower  cost.  Like  all  O.S.  engines they are built to standards of engineering excellence that have evolved through more than 60 years' experience in the design and production of model  internal-combustion  engines.  Advanced  modern precision machinery, top quality materials and  the  efforts  of  highly  skilled  craftsmen  and  technicians are combined  to ensure a continuation of  the  levels  of  performance,  durability  and  reliability for which O.S. is world famous.

SPECS:

Benchmark Prop: 8x4 break-in    
Bore: 0.598" (15.2mm)    
Carb Type: O.S. 10G designed for remote needle tuning    
Crankshaft Threads: UNF1/4-28 M5    
Crankshaft Type: Threaded    
Cylinders: Single    
Displacement: 0.15 cu in (2.49 cc)    
Engine (Only) Weight: 4.87oz (138g) w/o muffler    
HP: .41PS, 0.41 HP @17,000 RPM    
Height: 2.4" (61mm) crankcase botton to top of cylinder head    
Length: 2.16" (56.5mm) from back plate to front of drive washer    
Muffler Type: 2-piece aluminum    
Muffler Weight: 1.5oz (42g)    
Oil Type & Content: At least 18% synthetic lubricant    
Plug Type: O.S. A3    
Prop Range: 7x5-6 x 8x4-5    
RPM Range: 2,500 - 18,000    
Recommended Fuel: 5%-15% two stroke blend nitromethane    
Stroke: 0.539" (13.7mm)    
Type: 2-stroke glow powered aircraft engine    
Width: 1.6" (40mm) at mounting tabs