Hey guys, I have posted another thread in the engine forum stating that I am having a problem getting my boat on plane with a heavy load at the higher altitude lakes. The general concensus is that I need a different prop so I am hoping I can get some insight here. So, here is what I have:<br /><br />#1. Drive - 1998 4.3L EFI Merc Alpha 1<br />#2. Current prop - Merc. Vengence SS # 48 16316A45 19P<br />#3. Current RPM - 4850<br />#4. Hull - 1998 Sea Ray Sig 190 fiberglass<br />#5. Jack plate - not sure what that is.<br />#6. No tabs/foils<br />#7. General uses - The prop I use now works great for sea level uses. I am looking for another prop for use at higher altitude lakes (4800' MSL). I normally have a full load of people and like to wakeboard. I would like something that will pull a boarder out of the water easily and gets on plane quickly when cruising. Top speed isn't a huge issue but I would like 35-40 mph if possible.<br /><br />Thanks for any insight, advice, or recomendations you have.<br /><br />-Beer
<br /><br />So those numbers on my current prop, what do they mean? Is the 19P mean pitch? Isn't pitch measured in degrees not inches? If not, what is an inch of pitch? I was looking at the Merc prop finder and it says you need to know the outdrive gear ratio. Where can I find that out?<br /><br />I'm so boat stupid.