Re: 24:1 vs 50:1 in 64′ vs 65′ OMC engines Home › Forum › Ask A Member › 24:1 vs 50:1 in 64′ vs 65′ OMC engines › Re: 24:1 vs 50:1 in 64′ vs 65′ OMC engines Steve DReplies: 694Topics: 57 August 15, 2018 at 9:21 pm #81240 It’s unreasonable…and illogical…but I just don’t feel comfortable using 50:1 until maybe the late 60s early 70s. So sue me. 😎