HomeProductsMarine Engines3,5 ccKEEP.21M OUT-BOARD

KEEP.21M OUT-BOARD


   Displacement: 3,50 cc
   R.P.M. (max power): 42.800 RPM
   Practical range: 6.000-44.000 R.P.M.
   Bore x stroke: 15,88x17,60 mm
   Sleeve: 9 ports
   Rear ball bearings: ceramic
   Front ball bearings: steel
   Crankshaft: 14,5 mm - turbo
   Carburetor: aluminium - 9 mm - rotary 
   Glowplug: Turbo (C8TGH)
   Exhaust position: rear
   Starting: -
   Weight: 430 g
   Fuel type: 25% nitro
download-exploded-view
carburetor-setting
instruction-manual

Also available with rear and front steel ball bearings (KEEP.21M OUT-BOARD/A)


FEATURES

biella-R7   08569   85021t   02032
Conrod:
The R7 conrod is made from a superlight alluminium which has been checked ultrasonic. The specific form of the R7 creates little turbulence inside the engine while running.
  Sleeve:
The sleeve has 9 transfer ports and an exhaust with booster ports. The special shape and positioning of the ports, covered by a patent, improve the internal fluid-dynamics to obtain the maximum possible performance.
  Crankshaft:
The crankshaft is grinded to increase the mixture flow and has a special shape to reduce turbulences inside the crankcase. The balancing is done by two inserts made of tungsten alloy and the inlet has a silicon filling to reduce the weight of the crankshaft to improve acceleration. The ball bearing was lowered to 5mm.
  Coolinghead:
Innovative head for out-board engines with air & water cooling.

 

51011  51011es-mar 40044  40044-es-ut
350003600039014  
 
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