Re: Good prop pitch for fat guys on a 15' runabout 45hp Mercury Classic Fifty 50?
Let me see...don't know the size of boat,where the barnacles are,how much"lard"there is and maybe you only drink a 6 pack?
I doubt you know the rpms but even without that dropping 6 in pitch is normally going over board/extreme.
You say the boat isn't getting up to speed,what is it doing?
Take all the lard out you can and give her a try.
Old boat,waterlogged foam,barnacles on boat,motor runs good...?
Give us some more info and welcome to the site>.
That's about the most straight up answer I've heard on here in a long time. However, the OP is clearly asking for help and that's what we should be trying to provide, not excuses for not helping..
So then, to the OP (original poster). The factory prop that came stock with the motor can be identified with a little research at the iBoats store. Once you know what that is, you can compare it to what you have now and then start trying to figure out what you need to do to get the best possible performance.
If you're boat has barnacles on the hull it's going to affect performance so haul it out and clean it up before you go any further. You don't want to go spending money on props in the boats present condition. Essentially, you want to be able to say, "OK., this is the best that this boat is ever going to be, now lets do some test runs, record speed and RPM and see if we have the correct prop or if we need to change it."