bonz_d
Vice Admiral
- Joined
- Apr 22, 2008
- Messages
- 5,276
To start this off here is a link to the original thread I had started back in Oct.
http://forums.iboats.com/johnson-evinrude-outboards/late-80s-70hp-evinrude-driveshaft-584118.html
Now to the update. Got tired of looking at this thing sitting in the garage and the weather was nice so took some time today to see what I could do to get it apart. As the exhaust housing was already cracked very badly I took an angle grinder to it and cut out the sides around the water pump and was then able to get enough seperation between the pump housing and lower unit to get a sawsall in there to the drive shaft. Cut the shaft and was then able to remove the lower unit and the remaining part of the exhaust housing leaving the shaft well exposed.
The shaft as it was would not move so I took a 3lb hammer and tried to beat it back down which then loosened the shaft and it would wiggle around and slide up about 3/16" and get stuck again. With a 5lb hammer and a pipe wrench I was finally able to beat it out.
Looking at the splined end it appears the the shaft must have twisted inside the crankshaft. There are burrs on all 4 of the splines about half way down the spline were it looks like it turned.
Does anyone know or have pictures of what the splines should look like on this shaft? They do not look very deep until it gets just above where the oring will go. Also the spline is deeper on right side of the spline than it is on the left side when looking down the shaft from the end.
I have some picture of this but they are not very clear and don't show much detail.
Next step from here I think will be to reinstall the exhaust and transom clamp mounts and get it on a stand to try and get some compression testing done. If in poor condition I'll then start breaking it down for parts.
http://forums.iboats.com/johnson-evinrude-outboards/late-80s-70hp-evinrude-driveshaft-584118.html
Now to the update. Got tired of looking at this thing sitting in the garage and the weather was nice so took some time today to see what I could do to get it apart. As the exhaust housing was already cracked very badly I took an angle grinder to it and cut out the sides around the water pump and was then able to get enough seperation between the pump housing and lower unit to get a sawsall in there to the drive shaft. Cut the shaft and was then able to remove the lower unit and the remaining part of the exhaust housing leaving the shaft well exposed.
The shaft as it was would not move so I took a 3lb hammer and tried to beat it back down which then loosened the shaft and it would wiggle around and slide up about 3/16" and get stuck again. With a 5lb hammer and a pipe wrench I was finally able to beat it out.
Looking at the splined end it appears the the shaft must have twisted inside the crankshaft. There are burrs on all 4 of the splines about half way down the spline were it looks like it turned.
Does anyone know or have pictures of what the splines should look like on this shaft? They do not look very deep until it gets just above where the oring will go. Also the spline is deeper on right side of the spline than it is on the left side when looking down the shaft from the end.
I have some picture of this but they are not very clear and don't show much detail.
Next step from here I think will be to reinstall the exhaust and transom clamp mounts and get it on a stand to try and get some compression testing done. If in poor condition I'll then start breaking it down for parts.
