Re: 54Evinrude Big Twin crankcase

[Don]

quote OLCAH:

Bolted the crankcase together this morning then removed the head as one spark plug thread is stripped. The port side of each bore is shiny smooth. The starboard side of each bore has lots of shallow scratches. I really do not want to open the crankcase again but is condition of these bores common?
Thank you.
http://i77.photobucket.com/albums/j66/c … 1456167090
http://i77.photobucket.com/albums/j66/c … 1456167094
http://i77.photobucket.com/albums/j66/c … 1456167094
http://i77.photobucket.com/albums/j66/c … 1456167094

Well, can’t really see much in your pictures. Minor "scratches" are usually not a cause for concern, is there any evidence of aluminum scuffing on the cylinder walls? The intake bypass covers can easily be removed on the port side to get a closer look at the rings/piston skirts. Removing the exhaust cover shouldn’t be too tough on a fresh water motor, but cleaning up the gasket surfaces/carbon is time consuming, but removing the cover will give you a better look at the exhaust side of the pistons/rings.
I usually use some fine emery to clean up and remove the glaze from the cylinder walls. A little unethical, but works just fine.
Again, I can’t make any judgements based on your pictures because the cylinder walls don’t show up well. Take some more pictures if you can…D
PS, you can see the lower exhaust side of one piston just by flipping the powerhead on its side and looking up into the exhaust chamber if the powerhead is still off the exhaust housing….