Re: '56 Evinrude 30hp coming out of gear
Remove the 6 or so bolts that hold the lower unit to the leg, and the big bolt at the rear of the motor that goes in from the top. Then remove the little plate on the side of the leg to access the shift rod coupler. Remove the bottom bolt from the coupler. This will free up the lower shift rod, and the lower unit can then be removed. When putting it back together, make sure to grease the splines on the top of the driveshaft (just the splines, not the top) and make sure the water tube inserts properly into the rubber grommet on the water pump housing. Put the shift lever in forward, and re-install the bolts. Now, carefully move the shift lever to neutral or reverse until the lower shift rod slips back in the coupler. Make sure the notch in the end of the shift rod lines up with the bolt hole in the coupler, as the bolt must pass through the notch for it to tighten up properly and for the engine to shift properly. Re-insert bolt, tighten it, and you're done.