UMS 90cc Gas / Petrol 7 Cylinder Radial 4 Stroke Engine with Pump

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
• 4-stroke
• Midsize 90cc displacement
• Comes complete with exhaust collector ring and electronic ignition —one-box purchase for a ready-to-mount-and-run engine
• 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

Technical information  

• Cylinder:                   7 
• Cylinder capacity:     90cc
• Bore:                         25mm
• Stroke:                      26mm
• Power:                      9.5kg of thrust
• RPM Range:            1000-6000
• Weight:                     3.2.kg incl.(ignition coil and silencer)
• Width:                       230mm
• Lenght:                     158mm
• Propeller:                  24 x 10  1000 - 5900 RPM 2 Blade Menz's
• Propeller:                  24 x 12  1000 - 5700 RPM 2 Blade Menz's
• Propeller:                  23 x 10    800 - 5300 RPM 3 Blade Biela
• Muffler type:              Collector Ring
• Plug type:                  1/4-32 RECXL
• Carburetor:                WT 793-A Carburetor
• Petrol/Oil Mix:           1:32 2 stroke oil