Wondering if anyone has gone through this. I have an 87 374V with a 88 Merc 150 XR4 which originally had the (smaller) 4 1/4" 1.78:1 gear case and now I installed a 4 3/4" 1.87:1 gear case and was wondering what the best prop might be? Also, running a 5" CMC jackplate. I was running a 13 1/2" x 24p four blade with 3/8" holes that I believe was worked on before I bought it 20 years ago or so but the hub is spun, so I can't really try that one to start. Before the gearcase swap I was running about 60 (gps) at 5600 rpm. Thanks in advance.
Paul