Home / Tekno RC / Nitro Engines / TKR1712X
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Built for buggies and just as at home in a truggy. The BLOK 21bM is a not-broken-in competition engine with a smooth, linear power band and strong fuel mileage. Serious racers pay for that. The bottom end comes on smooth, then pulls hard through the mid and top for a short takeoff and straightaway punch. It runs a long-stroke piston and sleeve, a DLC coated silicone-filled crankshaft, and a laser-etched low-profile cooling head. Blue 6.0 and 6.5mm venturi. Parts swap with the popular 21aP. Comes paired with the 21J carburetor, known for tunability and consistency across temperature and humidity. Specs: Displacement: 3.49 cc / 0.213 cu in Bore: 16.27 mm / 0.641 in Stroke: 16.8 mm / 0.661 in Output: 2.55 ps / 2.59 hp at 33,000 rpm Practical RPM: 4,000 to 40,000 Weight: 362 g / 12.77 oz Recommended exhaust pipe: OS 2090. Recommended glow plug: OS P3. Warranty: Tekno RC guarantees it free of defects in materials and workmanship for up to 90 days from the original purchase. Fits: Tekno 1:8 NB48 2.0, NB48, NB48.3 and NB48.4 Nitro Buggy.
