As you push the throttles forward, you can really feel the thrust of the turboboost forcing you back into your seat. The MAN engines, combined with Viking's favorite Veem Interceptor propellers, give this boat both respectable speed and fuel economy. And the propeller pockets not only shorten the draft, allowing you to enter shallow harbors, they also substantially decrease the shaft angle, vectoring the props' thrust more parallel to the water's surface for improved fuel economy. At 1,800 rpm, the MANs moved the 46 along at a very comfortable 28.4 knots while burning a relatively conservative 64 gph. Top speed nearly touched 39 knots at 2,335 rpm, burning 118 gph.