Reply To: Power Head Cross Reference for 1958 Evinrude Fisherman 5516

[Mike Nazarenko]

1. Regarding the rings, are you suggesting that new ones be purchased.  The only rings available are  0378417 : 0378417 is 0.020 inches oversize and very few available online.  As I mentioned I was able to get a compression reading of 60 lbs on the bottom cylinder with the current rings.  Before I did the cylinder bore measurement I wiped down the cylinders to remove the debris.  If new rings are .020 oversize I will need to file them down and will need some help in how to best do that.
2. On the rings – – if the current rings have gap of .002 and .005 and there is compression reading of 60 lbs, what is the purpose of getting new rings, why not fit them both to .005.  At this point the additional cost is moot, but just asking.
3. Don’t believe the alignment pins were messed up originally but its hard to say now.  With the number of times I have reassembled the halves one came out and I knocked out the other.
4. As far as the connecting rod lock plates they were only on the top piston, not on the bottom one which is the connecting rod with a different color, suggesting that the rod was replaced and the lock plates left off during the repair.
5. There must be an issue with my digital caliper, I measured at the bottom of the piston skirt,  top piston – – 1.934, bottom piston – – 1.935.  I remeasured the cylinder bores,  top cylinder bore .1.9215, bottom cylinder bore 1.9230 which means the cylinder shouldn’t fit but it does.
6. Thank you for your continued comments.