This is the O.S. Max 21TM Engine with the Revo Manifold. Direct fit for the 2.5 and 3.3 Traxxas Revo. *** Two year limited warranty *** Distance between mountin...More

This is the O.S. Max 21TM Engine with the Revo Manifold. Direct fit for the 2.5 and 3.3 Traxxas Revo. *** Two year limited warranty *** Distance between mounting hole centers same side: 0.43 (11mm) Distance between mounting hole centers opposite side: 1.2 (31.4mm) Distance from end of crankshaft to drive washer: 1.03 (26.3mm) Distance from center of engine to front bearing: 1.4 (34.8mm) Distance/bottom of mounting flanges/top of cylinder head:3.2(81.2mm) Width of mounting flanges: 1.5 (39mm) Length of exhaust flange: 0.24 (6mm) Height/backplate mount to top of cylinder head: 3.3 (85.3mm) COMMENTS: Needle Settings: - High Speed Needle (Needle Valve) 2-1/2 turns out from close. To break-in close approximately 30¦ after running one tank of fuel through vehicle, repeat five times - Mid Range Needle (Mixture Control Valve) Screw head is exactly 1/2 turn in from flush with the carb body - Low Speed Needle (Metering Needle) Turn 30¦ clockwise to lean mixture or counter-clockwise to richen mixture jxs 8/31/07 ir/jxsLess