Engine details
Prestwich Model Boats
 Return to Main page 
EMAIL  marlesd@aol.com for a price and delivery quote

CMB 21 LS.21 longstroke greenhead.

  Technical details
Displacement (cc) 3.48
Bore (mm) 16.30
Stroke  (mm) 16.70

 
 
Cooling Green water-cooled head
Carb Barrel type carb 8.5mm bore .
Cylinder 1-Exhaust, 4-transfers, 1-boost, 2 piston bypass ports.
Induction  Drum valve  
Glow plug Cone plugsl  (TURBO)      
Head shims (mm) 0.1
Extra CMB Multi-Exhaust-System 2 ports + special tapered piston and top
Crankshaft 13 mm 
Main bearings  1 x 6000, 1 x 607
Recommended fuel 20% nitro
17% oil, 2% castor, the rest synthetic.
Recommended pipe length mm for gear drive. 185mm 
 
 WE SHIP WORLDWIDE  email  here  Phone.  UK  01942719147. international  0044 1942719147.   fax international 0044 1942713998.   Prestwich Model Boats, 1, Mill St, Golborne, Warrington, WA3 3QJ.  England..   Model boats of all types including FSRV, FSRH, FSR0 Offshore, Deepvee, fast electric, cats, zenoah gas boats.     Visa LogoMastercard LogoMaestro LogoElectron Logo