FS155-a Pumped 4-Stroke Engine

More power from a smaller package!

O.S. is legendary for four-stroke superiority, tuneability, performance, technology and ease of operation. Here is another fabulous large displacement where you can enjoy more power without the increase in size. It's easy to retrofit the FS155-a in your giant-scale aircraft - and enjoy consistent, 200-size power now and less cleanup in the long run! The FS155-a is a single cylinder overhead valve four cycle engine equipped with a fuel pump system. The PD-08 pump is designed for bigger models. With the 70R carburetor integrated with the pump, it ensures stable fuel delivery at all times.


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osmg0998
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  • Specifications
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Stock Number: OSMG0998
Displacement: 1.548 cu in (25.63 cc)
Bore: 1.323 in (33.6 mm)
Stroke: 1.126 in (28.6 mm)
RPM Range: 2,000-10,000
Output: 2.56 hp @ 10,000 rpm
Engine Weight: 28.40 oz (805 g)
Muffler Weight: 3.35 oz (95.0 g)
Includes: Type F glow plug & F-6020 muffler
Recommended Props: 16x8-12, 17x8-12

Primary Accessories

Stock Number Mfr Number Product Description Quantity Needed
 GPMQ4150   GPMQ4150  Great Planes Ultra Precision Fuel Filter 1
 MASQ1410   MA1680  Master Airscrew 16x8 K Series G/F Nylon Propeller 1

Field Equipment

Stock Number Mfr Number Product Description Quantity Needed
 DTXP0300   DTXP0300  Duratrax Glow Starter C Battery 1
 VNRP5292   15292  Venom C Eco Alkaline Batteries (2) 1

Optional Accessories

Stock Number Mfr Number Product Description Quantity Needed
 GPMP2000   GPMP2000  Great Planes 4-Way Prop Wrench 1
 GPMQ4131   GPMQ4131  Great Planes Silicone Fuel Tubing Standard 3' 1
 HCAP3300   HCAP3300  Hobbico TorqMaster 180 Heavy Duty 12 Volt 1
 HCAP3305   HCAP3305  Hobbico Panel Ready TorqMaster 180 1
 OSMG3130   72200170  O.S. Plug Cable Set Sirius 7 1
 OSMG3131   72200171  O.S. Plug Cable Sirius 7 1
 OSMG3133   72200200  O.S. Booster Cable Single 1
 OSMG5870   71531000  O.S. Bubbleless Clunk 1
 OSMG5872   72403050  O.S. Super Can Filter Large 1
 OSMG6334   72200060  O.S. 4-Stroke Valve Adjustment Kit 1
 OSMR2976   71521000  O.S. Long Socket Wrench With Plug Grip 1
 PAAP1453   PT31  Pacer Zap After-Run Engine Oil 1 oz 1
 XOAQ1708   PJA17X8  Xoar Props 17x8 PJA Serices Beechwood Propeller 1