Re: 4hp Evinrude impellor help needed
The top of the drive shaft is splined, and under normal circumstances, it should just pull out of the crankshaft. If it sticks, it's probably because of 2 reasons. Either it's rusted at the shaft/crank junction or there's been metal displacement in the spline area of the junction. You can try inverting the motor and dribble PB Blaster or other 'bust rust' penetrating oil down the shaft. This should be allow to soak. Using a pair of pliers, try rotating the shaft counter-clockwise, then clock-wise to free the shaft. Be sure your pliers are not used on the section of the shaft where the pump or pump housing are located. You don't want to 'knarf'(technical term) the bearing surfaces.<br /><br />Replace the drive shaft back into the lower unit, you may have to slightly rotate the prop to re-engage the lower drive shaft splines back into the lower unit pinion gear.<br /><br />Be sure you grease the upper drive shaft splines before you re-install the lower unit. The grease helps to prevent rusting again and helps the torque loading on the shaft splines.
