Double-Ace Racing Products present the AA K21 Engine. Double-Ace Racing Products is excited to offer the AA K21 Engine to provide RC boating enthusiast with a high-performance engine with quality and craftsmanship that can't be matched by other popular RC boating engine manufacturers at a competitive price.
. The K21 comes with a cable collet for 3/16" cable and two head buttons. One head button is for a standard glow plug and one for a turbo plug. The engine does not come with a carburetor. A CMB 21 bolt on carb works well and Speedmaster makes a carb as well. ...
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One of the most well-crafted mass production engines in the history of Radio-Controlled Boat Racing power plants, and owner of many of its own World Championship accomplishment, the Kalistratov 45 (AKA K45) is back on the block. If you are looking for a quality but less expensive alternative to the competition bolt in a K45. Test Tune and Go Racing. Built to be competitive out of the box.
Bore = .866"
Stroke = .772"
Exhaust timing = 180 degrees
Intake timing = 126 degrees ...