NEW PROP QUESTION

i am in the process of buying a new prop and was hoping for some input. for those of you that don't know, don't care or forgot i have an 88' 18' cc with a 96' merc 125. the current prop has no #'s stamped on it anywhere so i have no idea what size prop i am running now. top speed now is 32mph with 2 men and a full tank of fuel. i normally run about 5000-5200 rpms but wot is 5800. should i go three or four blade? stainless or aluminum? ??? thanks in advance for your input ;D

[spareparts]

there should be #'s somewhere, pull the prop off and look behind where the nut goes or look where the thrust washer goes. Worst case, carry it to a prop shop and have it checked. BTW some prop manufactures don't use the standard diameter/pitch identification( Michigan Wheels, maybe some others), you have to look up the prop part number to figure it out

[tsubaki]

Have you pulled the nut and washer off the shaft and looked to see if there is a size on the prop there? (same as spare :P)

i have pulled it off and looked inside and out and there is no stamp identifying the diameter or pitch. on the outside of the hub between two of the blades there is this #- FE3442

[tsubaki]

Not that this explaines the location any better.

I have seen a few without identifying marks.

[tsubaki]

Right now I have no short answers to what prop size will work best. However I do suggest starting with the AL props and reserve the 4 blades for later experiments.
Try the prop charts for the size boat you got if no one comes up any better suggestions. I have seen it become expensive trying to arrive at the correct prop for a boat. Many times it's not just the prop that matters but how deep or shallow the motor is set and also how the weight in the boat is arranged.

[macojoe]

Wow thats a small prop for a 125??

[Skools Out]

http://www.iboats.com/mall/propfinde...;cart_id=42871

use this to see what you have with the numbers

[reelapeelin]

What concerns me about that prop is lack of surface...blades look narrow and looks like too much space between blades ... I'd be lookin' for a prop w/wider blades=more surface=more thrust ...

Stainless vs aluminum is a tuff question and depends on your use ...lots of shallow, hard bottom, I'd stick w/ alum. ... performance in open-water; hard to beat SS ...

At WOT, yer gettin' the right RPMs, so the pitch sounds right, but you gotta figure out WHAT it is ... prop-shop in your area?...

[Skools Out]

wrong prop guys that's not who's asking lol