Yanmar 2GM20 vs 2GM20(f) (What the F?)

[TropicCat]

I recently pulled and disassembled one of my 1GM10 Yanmar diesels. I discovered that my 26 year old engine was in terrific shape even though being raw water cooled. I think I'll keep it another 26 years!!

[CapitainMike]

I had a 2GM18 Yanmar diesel. Do you have any fotos of the stuffing box/stern gland I would be very interested to see them as my stuffing box was removed and a Volvo stern gland fitted in its place and not very well I might say.