Horizon Hobby presented the Dynamite 12V DC Nitro Engine Heater. This device will properly pre-heat your .19-.32 size engine to 140-158˚F (60-70˚C) in approximately 10 minutes based on ambient temperatures. It helps to relieve the stress on the crank, connecting rod, piston and sleeve during warm-up. It will also help provide a smooth engine start, with reduced stress on your starter box.
