Today I finally got a compression guage to test ye old Mercury.
Well, let's just say that now I have a compression guage.
I tested all 6 cylinders and thus far I'm not too impressed. I didn't get any really what I thought were good readings. #s 3 & 4 are reading about 15 pounds lower that the others. They all read better when the cylinders are shot with oil. From what I hear this could be one of two things. Rings that are stuck and or not doing their job. Or scored cylinder walls. I'f it's the latter does anyone need a 300# paper weight? It'll hold down a BIG sheet of paper.
I'm hoping that the rings are just stuck from sitting in the barn for 5+ years. I would think that they would break loose over use of the motor?
I guess I'm going to proceed with the test fire this weekend (hopefully). If I can get it to fire and turn over this weekend I guess that it would be worth a new set of rings.
Any suggestions would be greatly appreciated as always. Do you all think I'm nuts?