I want to replace the original prop a 1998 115 heart Johnson motor with a stainless steel prop not sure which pitch to use or which size to buy new to boating
Go for a spin loaded as you would usually go boating and check max achieved RPM at wot with current prop, then decide from there if needing - or + pitch to optimize boat/engine performance.
Welcome, Please read the stickys at the top of the prop forum and get us as much info as possible.
We need a lightly loaded wot rpm and gps speed to evaluate your setup.
Your present prop size should be under the prop nut. diameter X pitch
