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.
- The same 2.6 horsepower as many 200-size power plants — with the dimensions and weight of a 120-size engine.
- Because it's a pumped 4-stroke, you'll enjoy plentiful power regardless of tank position, attitude or fuel level.
- Instead of oil venting through the crankcase, it's re-circulated to lubricate working parts — reducing friction and wear as well as cowl cleanup.
- Offers a broad power band to suit a variety of models.
- Specifications
- Exploded Views
- Parts Listing
- Accessories
- Gallery
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
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 |
