Merc 25 prop for Utah?

[fish_or_die]

Hi guys,

I just bought an 84 merc 25xd that came with an 11 pitch prop. It'll be pushing a riveted 1542 (300lbs?) and typically carrying two people and gear (500lbs?)

Running it at 5000-8000', am I better off finding a 13 pitch?

 

[jestor68]

Re: Merc 25 prop for Utah?

That's what the Mercury prop selector comes up with......13 pitch; at 8000 ft elevation.

 

[fish_or_die]

Re: Merc 25 prop for Utah?

ok. is there a good place to buy used merc props? or a good reason to get a new one?

 

[steelespike]

Re: Merc 25 prop for Utah?

Hi guys,

I just bought an 84 merc 25xd that came with an 11 pitch prop. It'll be pushing a riveted 1542 (300lbs?) and typically carrying two people and gear (500lbs?)

Running it at 5000-8000', am I better off finding a 13 pitch?

You lose 3% of power for each 1000 ft. So at 8000 You will be down about 24%
Roughly 5 hp. I would run it with the 11" and see how it does.
You should get a tach,Something like a Tinytach. Get the wot rpm and gps speed
lightly loaded.

 

[mpsyamaha]

Re: Merc 25 prop for Utah?

Yeah, i agree. why not run the 11 pitch and see where it lands you? Aluminum props for that motor shouldnt cost very much, so if the 11 isnt ideal, you could get a 13p as well. Having a spare prop once you figure out which one runs better for you would be nice anyways.

 

[fish_or_die]

Re: Merc 25 prop for Utah?

Sounds good, I'll see if I can get it up and running before everything ices over for the season! then....the long wait till spring