GT-33 Gasoline Engine
Second in the line of O.S. gasoline engines — but second to none in quality and performance!
When it comes to gasoline aircraft engines, the GT-33 is in a class of its own. It has the muscle to swing larger props, and it stands out for many other reasons, too. The GT-33 runs more quietly than comparable engines while exceeding their output, and it starts easily with electronic ignition that accepts many battery types. Once again O.S. has produced a gasoline powerhouse for the serious pilot!
- Produces 10% more power than any other engine in its class!
- Electronic ignition system offers fast, easy starting — and accepts LiFe, LiPo, NiCd and NiMH power.
- Rear-mounted Walbro® carb and intake simplify mounting and installation.
- O.S. E-5030 muffler effectively controls exhaust noise without compromising performance.
- Includes Rcexl spark plug.
With other engines you have to purchase a Pitts-style muffler separately — but the GT-33 comes with an E-5030 muffler that resists distortion, resulting in 5dB less noise than similar engines. The space-saving design reduces the need to cut the cowl in order to fit in scale applications.
Enjoy quick, confident starts with the included ignition module — which accepts batteries of all types, including LiFe and LiPo chemistries.
Mounting the Walbro carb at the rear allows for easy installation and easy needle access. The backplate mount is designed to reduce vibration, and the carb features a factory-supplied choke linkage, which needs to be set up by the modeler.
Crankshaft/bearings, piston liner and piston/pin and rod for the GT-33.
- Specifications
- Exploded Views
- Parts Listing
- Accessories
- Gallery
Stock Number: OSMG1533
Displacement: 2.013 cu in (32.98 cc)
Bore: 1.417 in (36.0 mm)
Stroke: 1.276 in (32.4 mm)
Practical rpm: 1,800-8,000
Output: 3.85 hp @ 9,000 rpm
Engine: 34.72 oz (984 g)
Silencer: 5.65 (160 g)
Igniter: 3.70 oz (105 g)
Includes: engine, E-5030 muffler, ignition module, CM-6 spark plug, exhaust gasket
Requires: gasoline, 2-cycle oil
Suggested Props: 18x10-12, 19x10, 20x8-10, 18x8
Suggested Break-In Prop: 18x8
Ignition Battery: 4.8-6.0V NiCd or NiMH, 6.6V LiFe or 7.4V LiPo pack
Gasoline/Oil Mix: 30:1-50:1
Displacement: 2.013 cu in (32.98 cc)
Bore: 1.417 in (36.0 mm)
Stroke: 1.276 in (32.4 mm)
Practical rpm: 1,800-8,000
Output: 3.85 hp @ 9,000 rpm
Engine: 34.72 oz (984 g)
Silencer: 5.65 (160 g)
Igniter: 3.70 oz (105 g)
Includes: engine, E-5030 muffler, ignition module, CM-6 spark plug, exhaust gasket
Requires: gasoline, 2-cycle oil
Suggested Props: 18x10-12, 19x10, 20x8-10, 18x8
Suggested Break-In Prop: 18x8
Ignition Battery: 4.8-6.0V NiCd or NiMH, 6.6V LiFe or 7.4V LiPo pack
Gasoline/Oil Mix: 30:1-50:1
Primary Accessories
| Stock Number | Mfr Number | Product Description | Quantity Needed |
| GPMQ4135 | GPMQ4135 | Great Planes Gasoline Fuel Tubing 3' | 1 |
| KSFP0310 | KL-310 | Klotz Gasoline RC Modelube 16 oz | 1 |
| TOPQ5220 | TOPQ5220 | Top Flite 18x8 Power Point Propeller | 1 |
Field Equipment
| Stock Number | Mfr Number | Product Description | Quantity Needed |
Optional Accessories
| Stock Number | Mfr Number | Product Description | Quantity Needed |
| HCAM6402 | HCAM6402 | Hobbico LifeSource LiFe 6.6V 200mAh 1C Receiver U | 1 |
| HCAM6410 | HCAM6410 | Hobbico LiFeSource LiFe 6.6V 1300mAh 1C Receiver U | 1 |
| HCAM6415 | HCAM6415 | Hobbico LiFeSource LiFe 6.6V 1100mAh 10C Receiver U | 1 |
| HCAM6425 | HCAM6425 | Hobbico LiFeSource LiFe 6.6V 1800mAh 10C Receiver U | 1 |
| HCAM6435 | HCAM6435 | Hobbico LiFeSource LiFe 6.6V 2100mAh 10C Receiver U | 1 |
| HCAM6445 | HCAM6445 | Hobbico LiFeSource LiFe 6.6V 3200mAh 10C Receiver U | 1 |
| HCAM6520 | HCAM6520 | Hobbico LiFeSource LiFe 6.6V 1900mAh 3C Tx/Rx U 4PK | 1 |
| HCAM6525 | HCAM6525 | Hobbico LiFeSource LiFe 9.9V 1500mAh 1C Transmitter U | 1 |
| HCAP3335 | HCAP3335 | Hobbico Safety Stick Engine Starter | 1 |
| SULP1703 | S603 | Sullivan Dynatron Super Power Starter | 1 |
| TOPQ5222 | TOPQ5222 | Top Flite 18x10 Power Point Propeller | 1 |
| TOPQ5224 | TOPQ5224 | Top Flite 18x12 Power Point Propeller | 1 |
| TOPQ5235 | TOPQ5235 | Top Flite 20x8 Power Point Propeller | 1 |
| TOPQ5240 | TOPQ5240 | Top Flite 20x10 Power Point Propeller | 1 |
| XOAQ1910 | PJA19X10 | Xoar Props 19x10 PJA Series Beechwood Propeller | 1 |
