UMS 125cc Gas - 5 Cylinder Radial 4 Stroke Engine
The UMS 5-125 is a very reliable radial engines which uses gas fuel. UMS has a ton of experience building radial engines. The design and construction are upper class leading to a outstanding realibility of these engines. They are easily servicebale. All critical parts are easily accesisble.

The UMS 5-125 is a very reliable radial engines which uses gas fuel. UMS has a ton of experience building radial engines. The design and construction are upper class leading to a outstanding realibility of these engines. They are easily servicebale. All critical parts are easily accesisble.
Key Features
- 5 cylinder radial configuration absolutely stunning looks and realism
- 125cc displacement perfect for scale project
- Comes complete with exhaust collector ring,spark plugs,electronic ignition, and engine mount ready to run
- User-friendly choke and throttle bellcranks included makes installation and operation easy
- Made from aluminum or bar stock where appropriate and CNC-machined accurate and repeatable specifications each and every time
- Cylinder head and crankcases produced from aircraft grade alloys
- Heavy duty double bearing crankshaft
- Billet aluminum pistons and hardened steel rings
- Hard chromed and lapped cylinder bores
- Hardened steel cams
- Burns 87-110octane gasoline with 32:1 gas/oil mixture
Standard | Metric | |
---|---|---|
Type | 4-Stroke Petrol | SPARK IGNITION |
CYLINDER | 5 (ABC TYPE) | 5 (ABC TYPE) |
CAPACITY (CU. IN) | 7.6 | 125CC |
Bore | 1.22" | 31MM |
Stroke | 1.29" | 33MM |
Thrust* | 33lbf @ 26x10 Menz prop | 15kgf @ 26x10 Menz prop. |
Power (HP) | 8 | 8 |
Rotation (RPM) | 1000 - 6000 | 1000 - 6000 |
Weight | 8.6lbs | 3.05kg incl.(silencer ) |
Engine Diameter | 10.4" | 265MM |
Engine Length | 6.5" | 166MM |
Propeller** | 26x8, 26*10 | 26x8, 26*10 |
Muffler Type | Collector Ring | Collector Ring |
Plug Type | CM-6 RcExl | CM-6 RcExl |
Carburetor | WALBRO WT-621 | WALBRO WT-621 |