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UMS 7-90cc Gas – 7 Cylinder Radial 4 Stroke Engine

The UMS 7-90 is a very reliable radial engines which uses gas as fuel. UMS has a ton of experience building radial engines. It has brought more than 2000 engines to market so far. The design and construction are upper class leading to a outstanding realibility of these engines. They are easily servicebale. All critical parts are easily accessible.

Availability:

Available on backorder

$2,190.00

Available on backorder

The UMS 7-90 is a very reliable radial engines which uses gas as fuel. UMS has a ton of experience building radial engines. It has brought more than 2000 engines to market so far. The design and construction are upper class leading to a outstanding realibility of these engines. They are easily servicebale. All critical parts are easily accessible.

 

  • 7 cylinder radial configuration absolutely stunning looks and realism
  • 90cc 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 bell cranks 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 87-110 octane gasoline with 32:1 gas/oil mixture

 

SKU: UMS7-90 Categories: ,
Weight 13.2 lbs
Dimensions 14 × 14 × 12 in

UMS Gas Radial Engine Manual 7-90

7-90CC 7CYLINDER  TECHNICAL SPECIFICATION

 

 

Standard Metric
Type 4-Stroke Petrol SPARK IGNITION
CYLINDER 7 (ABC TYPE) 7 (ABC TYPE)
CAPACITY (CU. IN) 5.5 90CC
Bore 0.98″ 25.1MM
Stroke 1.02″ 26MM
Thrust* 20.9lbf @ 24×10 Menz prop. 9.5kgf @ 24×10 Menz prop.
Power (HP) 6 6
Rotation (RPM) 1000 – 6000 1000 – 6000
Weight 6.1lbs 2.8kg incl.(silencer )
Engine Diameter 9″ 230MM
Engine Length 6.7″ 170MM
Propeller** 24×8, 24×10, 24×12 24×8, 24×10, 24×12
Muffler Type Collector Ring Collector Ring
Plug Type 1/4-32 RcExl 1/4-32 RcExl
Carburetor WALBRO WT-621 WALBRO WT-621

 

 

 

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