Hello I have a 89 tracker tf1800 with a mariner 150 mag 2. I had a 25 pitch 4 blade not sure what the diameter is. I bought a 3 blade 23 14 1/4 aluminum because I needed to gain some rpms, Motor wouldn’t even go about 1500 rpms. The 25 4 blade has a smaller exhaust than the new one. Wondering what you guys think. Do the smaller props like 12 3/4 and 13” have a smaller exhaust? If you have same boat and motor or a mercury and prop you run and have good performance please let me know! Thanks
