My on-line Seloc account is not working so... until I get that squared away:
I decided to get a new lower unit for this motor. I have to use my old drive shaft but do not know how to remove it from the old lower unit. Is there a trick to removing the upper half of the drive shaft or is mine just stuck? After looking at the new lower unit, it looks like its just a spline shaft that should pull straight up and out.
The exact cause of the damage is unknown but could have been a prop strike about a year ago. Hit a small diameter pipe sticking up off of the bottom in the middle of the channel. Dinged my brand new stainless prop. Aside from that incident, there has been no trouble until the case bulged out and split around the area of the pinion gear. Oil changes were fine with no metal or "milk" until it tore itself apart.
Is there a way to remove only the upper shaft of the 2 piece drive shaft from my old unit and install it in my new lower unit without the complete teardown?
My new lower unit came completely assembled with lower drive shaft installed. All it needs is my upper drive shaft to go back on the boat. Most new lower units I looked at are sold the same way, i.e., you use your old upper shaft.
Thanks in advance,
60
Last edited by CL60 : January 13th, 2008 at 06:04 PM.
Reason: Continuity
Now that I've removed the old shaft, I can see how it works. The manual just doesn't go into that kind of detail. Just have to tap the old shaft into the new unit until it snaps in to place.
By the way, after gutting my old unit, I discovered that the pinion gear was missing an entire tooth. The tooth fell out into my hand after removing the bearing carrier. It looks like the loose pinion gear tooth floated around until it got wedged between the reverse gear and the case causing the split. I'm lucky I made it back to the dock without catastrophic failure.
Anyone know what could cause an entire pinion gear tooth to break off cleanly?
Gear tooth breakage is usually caused by either improper shimming of the driveshaft/pinion gear, or a faulty gear that got by the quality control department.
The upper driveshaft removal/installation? I'm not familiar with the 1997 model as I retired a few years before that BUT the earlier two piece shafts incorporated a spring and a locking pin that retained the shafts. There was no snapping the two together. Hopefully someone with that 1997 knowledge will jump in here with that know how.
A cylindrical clip is set inside the lower shaft by use of a roll pin on one end. The upper shaft, when inserted, snaps into the end of this clip. Only thing is, its a one way deal. Once you install the upper shaft, it won't come out without gutting the unit.
Got the LU assembled now, just waiting on a grommet for the midsection. Painting today, then installation later in the week. After that, break-in.
If I ever have to R&R and lower unit again, I'm spending the dough and getting a complete unit...ready to install!
Evinrude drive shaft removal
Linear Mode
