FS72-a
The Tradition Continues...
Everyone knows about how the FS56-a, FS81-a and FS110-a deliver superior 4-stroke power and performance, as well as how they've revolutionized the engine industry. Now, O.S. has filled in the missing link with the release of the FS72-a. Pilots of .60-sized aircraft can now enjoy such FS-a benefits as a blow-by internal oil system. It eliminates the need for a crankcase and re-circulates excess oil throughout the engine. No fuss...No muss...Just a first-rate engine that sets new standards while continuing traditional O.S. quality. The FS72-a Four-Stroke – only from O.S.
- The adjustable F-5030 muffler can be rotated 360° and moved in or out for a perfect fit. Rich, deep sound is an added benefit.
- A reversible carb and narrower camshaft housing simplify installation.
- Tighter tolerances and updated engineering reduce maintenance and ease set-up.
- Delivers more performance power to sport pilots and more realistic flight to scale pilots.
- Specifications
- Exploded Views
- Parts Listing
- Accessories
Stock Number: OSMG0877
Displacement: 0.72 cu in (11.8 cc)
Bore: 1.063 in (27 mm)
Stroke: 0.822 in (20.6 mm)
Practical rpm range: 2,400-12,500
Output: 1.18 hp @ 11,000 rpm
Weight w/o muffler: 16.79 oz (476 g)
Weight w/muffler: 18.7 oz (530 g)
Includes: 61N carburetor, F-5030 muffler & F glow plug
Displacement: 0.72 cu in (11.8 cc)
Bore: 1.063 in (27 mm)
Stroke: 0.822 in (20.6 mm)
Practical rpm range: 2,400-12,500
Output: 1.18 hp @ 11,000 rpm
Weight w/o muffler: 16.79 oz (476 g)
Weight w/muffler: 18.7 oz (530 g)
Includes: 61N carburetor, F-5030 muffler & F glow plug
Primary Accessories
| Stock Number | Mfr Number | Product Description | Quantity Needed |
| TOPQ5155 | TOPQ5155 | Top Flite 13x6 Power Point Propeller | 1 |
Field Equipment
| Stock Number | Mfr Number | Product Description | Quantity Needed |
Optional Accessories
| Stock Number | Mfr Number | Product Description | Quantity Needed |
| DTXR0185 | DTXR0185 | Duratrax Engine Tuning Screwdriver | 1 |
| DTXR0187 | DTXR0187 | Duratrax Engine Tuning Tool | 1 |
| OSMG2624 | 72109500 | O.S. Exhaust Manifold Inside FS-70/FS-91 | 1 |
| OSMG2625 | 72109600 | O.S. Exhaust Manifold Outside FS-70/FS-91 | 1 |
| OSMG2672 | 72108110 | O.S. Flex Pipe FS70-91S/70U/FL70/FS81A 240mm 1111B | 1 |
| OSMG2684 | 72108100 | O.S. Flex FS70-91S/70U/FL70/FS/81A 120mm 1111A | 1 |
| OSMG2687 | 72108120 | O.S. Flex FS70-91S/70U/FL70/FS81A 170mm 1111C | 1 |
| OSMG2689 | 72108130 | O.S. Flex FS70-91S/70U/FL70/FS81A 330mm 1111D | 1 |
| OSMG2805 | 71905010 | O.S. Radial Mount 72FS-a | 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 |
| OSMG7290 | 72200080 | O.S. Needle Ext Cable FR5 300 | 1 |
| OSMR2976 | 71521000 | O.S. Long Socket Wrench With Plug Grip | 1 |
| PAAP1453 | PT31 | Pacer Zap After-Run Engine Oil 1 oz | 1 |
| TOPQ5160 | TOPQ5160 | Top Flite 13x8 Power Point Propeller | 1 |
| TOPQ5170 | TOPQ5170 | Top Flite 14x6 Power Point Propeller | 1 |
