what prop to buy?

TRBenj wrote: What did the gps say? Either your tach is off or you’re missing 200-400rpm somewhere.

I am going to take it out tonight (if storms stay away) and check again. I did have 5 people in the boat when I checked, and didn't GPS it either...... I just had glanced at the RPM's once while running a WOT, so I'll pay more attention and report back.

Dan

What did the gps say? Either your tach is off or you’re missing 200-400rpm somewhere.

I agree that the ACME 540 is quite nice. your top end RPM is ok?

Where are you sending the OJ to get tuned?

Flyweed

Here's a little discussion in the link to maybe expand your nut knowledge whether you have 2 or just 1


link

Got my new 540 installed this morning.
I think the old O.J. 680 MUST have been on this boat as OEM.

The new 540 was installed the same as the 680....two Nuts, and NO cotter pin. There wasn't even a hole in the shaft that I saw.   Was this ever common?? I see most with a thin nut, thick nut and cotter, pin...mine just has two thicker nuts. Again, it's the way it came when I got it.

Anyway, here is a pic of the new 540 on. Ready to test out tonight on the lake.

GottaSki wrote: For posterity, if you could take a picture of your wake from the stern of the boat at 30mph with the old prop and new prop, i would be most interested in seeing that.

GottaSki - I took the boat out this morning with my two boys..and here is the photo of the wake at 30 mph, on the prop that the boat came with. (an O.J. 608) 4 blade.


Original Prop that came with my boat

For posterity, if you could take a picture of your wake from the stern of the boat at 30mph with the old prop and new prop, i would be most interested in seeing that.

Oh boy......Got my new "toy" from UPS today. Can't wait to get this on and try it out.

Well...got the 540 prop on order from Delta, and went to NAPA and picked up some Prussian Blue and valve grinding compound. Can't wait to get a new prop on!!

$345 with free shipping from Delta... a CCFan site sponsor.

TRBenj wrote: 540 would be the right place to start. Could potentially benefit from a 542.

flyweed wrote: DGabler....I don't think a 540, 3 blade on my boat would be any good. With the 285hp engine, and the pitch on that prop, it would put my RPM's well above the recommended 5000rpms.

Not sure how you got there.

540 would be the right place to start. Could potentially benefit from a 542.

DGabler....I don't think a 540, 3 blade on my boat would be any good. With the 285hp engine, and the pitch on that prop, it would put my RPM's well above the recommended 5000rpms.   

https://acmemarine.com/pages/custom-fit was spot on for my needs.

[edit to add]
On my 88 I put a ACME 540 3 Blade 13" X 12"   WOW what a difference compared to the stock Federal prop (13RH13) Great out of the hole, max speed is down a bit to ~45 +/- Gulps gas at WOT so rarely up there. Highly responsive.

Hey guys...So I've decided that I want to get a second prop for my 93 SN.   I will keep the original prop thats on it currently as a spare. It's got a few little nicks and dings, so may get those fixed on it, after I swap them out.

Anyway, my engine is: PRP-PR-R10   and my transmission is the 1:1

I am attaching a pic of what is currently on the boat. Is this NOT a right hand prop?? or am I mistaken? Just want to be sure to order correctly. Props are so confusing.

Also, should I look at a 3 blade, or 4 blade? I am looking for a bit better Hole shot.

(photo of my current prop)