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Can anyone tell me how to identify the difference between a BM100 and a BM130 from the outside? Are there any diferences in the fins, head or casting numbers?
Keith,The BM 130 does have more fins than the 100 due in part to the longer stroke. Also a larger bore. I think the 100 has 8 (not including the head fins) and the 130 has 9. If that doesn't tell you let me know and I can go count mine or take a couple pictures.
Dan
