Name: UMS 100cc Gas – 3 Cylinder Radial 4 Stroke Engine
SKU: UMS3-100
Price: 2000.00 USD
Availability: InStock
Rating: 5.00 (1 reviews)

The UMS Radial 100cc it is a very reliable engine, machined with a very hi precision .

Key Features

3 Cylinder in RADIAL configuration absolutely stunning looks and realism
100 cc displacement perfect for scale project
Comes complete with exhaust muffler ,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 40:1 gas/oil mixture

Specifications

3 100 cc dimensions

TBD Manual

	Standard	Metric
Type	4-Stroke Petrol	SPARK IGNITION
CYLINDER	2(ABC TYPE)	2 (ABC TYPE)
CAPACITY (CU. IN)	6.10	100 CC
Bore	1.45″	37 MM
Stroke	1.25″	32 MM
Thrust*	27.55lbf , 24×10 SEP prop	12.5 Kgf, 30×10 SEP prop
Power (HP)	6.6	6.6
Rotation (RPM)	1000 – 5500	1000 – 5500
Weight	6.83 lbs	3.1 kg incl.(silencer )
Engine Diameter	10.35″	263 MM with Valve open
Engine Length	9.07″	230.5 MM
Propeller**	24 x 8 – 24 x 10	24 x 8 – 24 x 10
Muffler Type	Collector	Collector
Plug Type	CM-6 RcExl	CM-6 RcExl
Carburetor	WALBRO WT-621	WALBRO WT-621

Reviews (1)

1 review for UMS 100cc Gas – 3 Cylinder Radial 4 Stroke Engine

Rated 5 out of 5

Daniel Basovitch – October 30, 2025

This is my 3rd 4 Stroke from UMS / C&H, another incredible motor !
This 3 cyl 100CC is going into my Ziroli AT-6, instead of the typical G62 or DA-60 2 stroke.