What's the perfect engine for a 40 size Seamaster and is an OS 52 4s okay. My last one had an OS 46 FX 2 stroke and was plenty of power. So I'm wondering if the OS with the extra weight is okay. Book says 50 to 60 size 4 stroke so I hope I'm okay with the 52. Thanks for any input. I'm normally a Saito guy but I wanted to use a 4 stroke and had this one laying around.

Jim