17794A 1 Mercury BEARING ASSEMLBY

Additional Reference Material
ASTM D217-68 - Worked PenetrationASTM D2896 - TBN MeasurementsAll ASTM Specifications can normally be obtained from your local technological society, library or college.SAE J313 - Diesel FuelsSAE J754 - NomenclatureSAE J183 - ClassificationSAE Specifications can be found in your SAE handbook or can be obtained from your local library, college or technological society.Brake Horsepower (BHP)A measurement of the developed power of an engine in actual operation.DroopSometimes referred to as steady state speed regulation. It is the speed variation from High Idle speed to Full Load speed expressed as droop = H.I. - F.L. × 100% ÷ F.L.H.I. = High Idle SpeedF.L. = Full Load SpeedFull Load SpeedThe speed at which maximum hp, and maximum fuel delivery are usually developed. Full load speed equates to a full contact with the fuel control stop (stop bar or torque spring) and is 20 rpm below "set point".GovernorA device designed to control the speed.Governor OverrunThe rpm range of the engine between high idle speed and full load speed where the governor is controlling the fuel rate.High Idle SpeedThe highest speed attained with no load on the engine. It is not an adjusted specification and may vary due to parasitic load, full load speed and governor spring.Low Idle SpeedMinimum engine speed with the throttle (governor control lever) released or in the lowest setting.LugThe rpm range of the engine below full load speed, throttle is fully open, engine cannot accelerate because of load. Governor is holding rack at its maximum and engine rpm is a function of load.Operating RangeThe acceptable rpm range of the engine between full load speed and peak torque speed for maximum power at full throttle or maximum fuel efficiency at part throttle.PowerThe rate at which work is being done.Rated SpeedSame as full load speed.Peak TorqueThe maximum amount of torque developed.RPMAbbreviation for revolutions per minute.Set PointAn adjusted specification 20 rpm above full load speed. Set point ensures full contact with the fuel control stop (stop bar or torque spring) as the engine is loaded to full load speed. Set point equates to 10% to 75% contact with the fuel control stop.Speed DroopEngine speed variation from no load to full load.StabilityThe ability of a governor to maintain desired engine speed without speed fluctuations.Stop BarSolid stop in the governor used to limit the amount of fuel being injected.TDCAbbreviation for top dead center and refers to the position of the piston in the cylinder.TorqueAn effort devoted toward twisting and turning.Torque RiseTorque increase between rated full load speed and peak torque speed, expressed: Torque Rise = P.T. - R.T. × 100% ÷ R.T.P.T. = Peak TorqueR.T. = Rated TorqueTorque increases due to increased combustion efficiency and less friction as the engine is loaded below full load speed.Torque SpringA flexible stop bar which allows a small amount of additional fuel to be injected as the engine is loaded below full load speed. This causes more torque rise to be developed. A torque spring is used to increase the natural torque rise of the engine in order to adapt the engine to a specific application.Progressive ShiftingShifting through the gears during vehicle acceleration in such a way as to accelerate the engine in each gear only up to the engine rpm required to permit picking up the load easily in the next gear.