O.S. GT33 2-Stroke Gasoline Engine w/Muffler

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O.S. GT33 2-Stroke Gasoline Engine w/Muffler
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This is the O.S. GT33 2-Stroke Gasoline Engine. The GT-33 Gasoline Engine produces 10% more power than any other engine in its class! An electric ignition system offers fast, easy starting and can use LiFe, LiPo, NiCd or NiMH power. The E-5030 muffler resists distortion, resulting 5dB less noise than the competition. Includes a Walbro carb and CM-6 spark plug.

Features:
  • Second in the O.S. line of gas engines — second to none in quality and performance!
  • 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 CM-6 spark plug.
Specifications:
Displacement: 2.013"³ (32.98cc)
Bore: 1.417" (35.99mm)
Stroke: 1.276" (32.41mm)
RPM Range: 1000-8000
Total Weight: 43.39 oz (1230g)
Engine: 34.57 oz (980g)
Muffler: 4.94 oz (140g)
Ignition: 3.88 oz (110g)
Requirements: 2-cycle oil, 4.8-6V (4-5 cell) NiCd or NiMH or 7.4V (2S) LiPo or 6.6V (5.5-cell) LiFe battery pack, Voltage regulator (LiPo use only) and 18x8 prop (for break-in); 18x10-12, 19x10 or 20x8-10 (for subsequent use)

This product was added to our catalog on January 24, 2018

Matt C
Sunday, Feb 11 2024 (10 months ago)
O.S. GT33 2-Stroke Gasoline Engine w/Muffler
I picked up one of these many years ago and ran it in a 30cc Escapade. It was easy to break in and easy to tune. Starts pretty easy when warm out, first start you will want to prime the engine or use a starter. Lots of power runs really well. Another testimate is that I didn't run the engine for two years (had a son), I fired it up a couple months ago and took me about 18 or so flips and it fired right up.

Ensure you run the fuel out of the carb when you are finished for the day. I use a large 18 inch roller to start mine as I have heard it can start backwards if you don't flip it well (I've seen it maybe half a dozen times but it died right away). Also since this doesn't have bolt holes like others. I bought some Bushing Sleeve 8 x 10 x 10mm from Amazon as it is a weird size which is probably the only annoying thing I feel about this engine.

I ended up buying 2 more of these. One in a 26% Extra 330, the other in a 70' wingspan FW 190.
Amit B
Thursday, Dec 31 2020 (about 3 years ago)
O.S. GT33 2-Stroke Gasoline Engine w/Muffler
Very pleased with in. Using the engine over three years now, no issues at all.
Switched to 20x8 prop After break-in period, unlimited vertical climb on the Ultrastick 30CC.
kim scheie
Sunday, Oct 11 2020 (about 4 years ago)
O.S. GT33 2-Stroke Gasoline Engine w/Muffler
awesome power but mine after only 12 hours folded a piston ring okay no problem will fix and get warranty . Doubt any warranty and parts are very hard to get . plane survived .
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