Home › Forum › Ask A Member › OMC Big Twin Cylinder Bores › Re: OMC Big Twin Cylinder Bores
OK, I see that measurement now…
.010" is quite a bit out of round…But, he mentions this is at the top of the cylinder. I’m wondering if this measurement is actually in the ring travel area, or just above where combustion takes place. I wouldn’t worry about it too much if this out of round condition is only above the area of ring travel. The rest of the cylinder seems only off by .001" which is very little wear. I guess this is a case where a quick/light hone job with a nice rigid hone might help show just where the actual wear is….
I guess I would re-measure, and perhaps check the ring end gaps using the old rings. I’m with Frank, new standard rings and a quick hone job is probably all that is needed unless you find more excessive out of round/oversize conditions in the area of ring travel….