A single cylinder vertical engine has a bore of \(300 \mathrm{~mm}\), a stroke of \(350 \mathrm{~mm}\) and a connecting rod of length \(700 \mathrm{~mm}\). The weight of the reciprocating parts is \(125 \mathrm{~kg}\). When the piston is at quarter-stroke from TDC and is moving downwards, the net pressure on it is \(0.55 \mathrm{MPa}\). If the speed of the engine is \(240 \mathrm{rpm}\), calculate the turning moment on the crankshaft.