Whats the salvageability of this MC-1 upper?

[ttownthomas]

As I work through the mechanicals I decided to disassemble the uppers from my 1972 Bertram project. MC-1 165's. I watched some online videos and studied seloc and the fsm. My spanner came today so I took it apart. Got everything but the larger driveshaft seal apart. Here are the pictures. Not overly optimistic about it at this point.

Upper cap outer race:
MC-1 Upper - 1 by ttownthomas, on Flickr

Top driveshaft bearing:
MC-1 Upper - 2 by ttownthomas, on Flickr

Drive shaft Gear:
MC-1 Upper - 3 by ttownthomas, on Flickr

Output end of gear assembly:
MC-1 Upper - 4 by ttownthomas, on Flickr

Lower seal, the mangled part was just floating in there:
MC-1 Upper - 5 by ttownthomas, on Flickr

Yoke:
MC-1 Upper - 6 by ttownthomas, on Flickr

Yoke Seal:
MC-1 Upper - 7 by ttownthomas, on Flickr

Mounting surface for lower seal:
MC-1 Upper - 8 by ttownthomas, on Flickr

Gear assembly and roller bearing assembly. Looks like it has been hot.
MC-1 Upper - 9 by ttownthomas, on Flickr

Outer race of lowest roller bearing on driveshaft:
MC-1 Upper - 10 by ttownthomas, on Flickr

Roller bearing looks like it has been spinning due to discoloration?
MC-1 Upper - 11 by ttownthomas, on Flickr

 

[kenny nunez]

Since the plastic water pocket cover is melted I am willing to bet that the 4 mounting screws are not going to come out and will break off which is the death knell for a driveshaft housing. If that was not the case it would be possible to rebuild the housing with all new internals. What is the spline count on the vertical shaft?

 

[ttownthomas]

13. I’ll try to break those cover screws on Monday. I’m away from the house

 

[dubs283]

the worst part is the top cap bearing and race, you can replace them and not have to worry about the gear height. you will need to check the driveshaft preload and possibly adjust the shims under the top cap race

everything else looks normal for a 48 year old merc drive, clean up the seal surfaces really good and they should be fine

good luck on the water passage pocket removal, heat the bolts prior to removal

if the input shaft bearing race were spinning the casing would be destroyed, it's either stained or heat has caused the discoloration

don't forget to grab the spacer and shims from the input shaft seat

 

[ttownthomas]

Water pocket screws came out ok. Used a little heat (thanks for the suggestion) and a light electric impact and they came right out. A little scotch-bright made some progress on the yoke also.

MC-1 Upper - 2 (1) by ttownthomas, on Flickr

MC-1 Upper - 1 (1) by ttownthomas, on Flickr

MC-1 Upper - 4 (1) by ttownthomas, on Flickr

MC-1 Upper - 1 (2) by ttownthomas, on Flickr