Prop selection question |
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Crmaverick
Senior Member Joined: July-06-2019 Location: Central MA Status: Offline Points: 190 |
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Posted: August-11-2019 at 3:04am |
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I’m looking at ordering an Acme prop for my 454, it’s a LH motor. Dumb question does this mean I order a LH prop? I was looking at getting the Acme 541
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KENO
Grand Poobah Joined: June-06-2004 Location: United States Status: Offline Points: 10669 |
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In your case you need a LH prop with your 1 to 1 transmission that turns the same direction as the engine. Not exactly knowing what you're using the boat for, I'd say you might want to do a little more research before getting a 541 with your 400 ish HP 454 in the boat What's on it now as far as pitch and diameter? |
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Crmaverick
Senior Member Joined: July-06-2019 Location: Central MA Status: Offline Points: 190 |
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I’m not sure I’ll have to take a measurement, but when I punch the throttle at 30 or so it cavitates. Out of the hole it doesn’t cavitate though, guessing whatever on there is wrong
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KENO
Grand Poobah Joined: June-06-2004 Location: United States Status: Offline Points: 10669 |
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It would be a lot easier to read what's stamped into the hub for diameter and pitch.
You must have 4 thousand or so HP if it acts like you describe above, cavitating when you punch it at 30 |
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Crmaverick
Senior Member Joined: July-06-2019 Location: Central MA Status: Offline Points: 190 |
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Haha makes sense, how about a RH prop would that cause it? Print is hard to make out except for one code. Does this look like an RH prop? Also measures out to an 11” prop. https://drive.google.com/file/d/1W9mwUGi4wbtHeQJ1y5_0twl2P8nAhnDN/view?usp=drivesdk https://drive.google.com/file/d/1qej4GlOPJpcaY5bv8g_PW0Z87VTT5yb0/view?usp=drivesdk https://drive.google.com/file/d/1oYGUAEFVdVZuhp0gNQU1lbL0t7HPB-F-/view?usp=drivesdk |
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GottaSki
Grand Poobah Joined: April-21-2005 Location: NE CT Status: Offline Points: 3333 |
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What's up with the stop collar?
And that's a LH prop, we determined that when you first arrived Should be 13x14 I see prop damage and wonder if the key is spun out |
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"There is nothing, absolutely nothing, half so much worthwhile as messing around with boats...simply messing."
River Rat to Mole |
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GottaSki
Grand Poobah Joined: April-21-2005 Location: NE CT Status: Offline Points: 3333 |
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That engine should spin a 13x14 5200rpm abouts or higher
You put a 451 on it it's going to frag the engine |
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"There is nothing, absolutely nothing, half so much worthwhile as messing around with boats...simply messing."
River Rat to Mole |
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Crmaverick
Senior Member Joined: July-06-2019 Location: Central MA Status: Offline Points: 190 |
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Right I was looking at 541 prop, one on mine measures out to 11” and makes me cavitate past 6000 rpm |
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KENO
Grand Poobah Joined: June-06-2004 Location: United States Status: Offline Points: 10669 |
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451 that must be a case of inverse, modified dyslexia or something You better turn the key off and hide it somewhere till you get something like Gotta Ski mentioned as a starting point to keep the RPM's down |
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GottaSki
Grand Poobah Joined: April-21-2005 Location: NE CT Status: Offline Points: 3333 |
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Indeed, we advise against the 541 you are looking at!
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"There is nothing, absolutely nothing, half so much worthwhile as messing around with boats...simply messing."
River Rat to Mole |
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Crmaverick
Senior Member Joined: July-06-2019 Location: Central MA Status: Offline Points: 190 |
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Sounds good thanks. How about the acme 425? It’s a 13x13. All the 13x14 are no longer available for some reason |
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KENO
Grand Poobah Joined: June-06-2004 Location: United States Status: Offline Points: 10669 |
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Look on the end of your prop hub where the nut butts up against it, you might find the dimensions stamped right there.
Some have it on the other end too. |
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KENO
Grand Poobah Joined: June-06-2004 Location: United States Status: Offline Points: 10669 |
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Mav
You have a PM |
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GottaSki
Grand Poobah Joined: April-21-2005 Location: NE CT Status: Offline Points: 3333 |
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why the chub for an acme?
What's your intent with the boat? |
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"There is nothing, absolutely nothing, half so much worthwhile as messing around with boats...simply messing."
River Rat to Mole |
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Crmaverick
Senior Member Joined: July-06-2019 Location: Central MA Status: Offline Points: 190 |
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Haha I hear they’re good props. I’ll be pulling skis and tubing, probably mostly cruising though |
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8122pbrainard
Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41040 |
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Somethings very odd with that prop. Besides the key, I wonder about the taper in the bore. |
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GottaSki
Grand Poobah Joined: April-21-2005 Location: NE CT Status: Offline Points: 3333 |
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I see Well a great prop but wrong size will still leave you flat, or worse, broken, you understand. Something is amiss, continue to be patient with our inquiries, and we'll get you sorted out and undo what has been mismanaged prior to it getting to you. A run of the mill 13x14 federal should still pull 3 footers on that boat so its not like you should need to experiment with an unproven recipe to get similarly good, solid performance. |
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"There is nothing, absolutely nothing, half so much worthwhile as messing around with boats...simply messing."
River Rat to Mole |
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Crmaverick
Senior Member Joined: July-06-2019 Location: Central MA Status: Offline Points: 190 |
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I actually ordered a acme 425 this morning https://www.skidim.com/products.asp?dept=1130 Skidim recommends them on the barefoot 454, ordered from nettleprop.com for $345 |
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Crmaverick
Senior Member Joined: July-06-2019 Location: Central MA Status: Offline Points: 190 |
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My next issue is how do I pull that old prop with that collar in the way? |
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TRBenj
Grand Poobah Joined: June-29-2005 Location: NWCT Status: Offline Points: 21113 |
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That’ll come out of the hole well but you’re gonna need more prop up top... probably not the best all around choice. At least for an early hull with the HO.
Delta is a site sponsor and $10 cheaper with free shipping FYI. |
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8122pbrainard
Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41040 |
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You may need to disconnect the shaft coupling at the trans and pull the shaft aft so you have room for the puller between the collar and strut. Then pull the collar along with the prop. I recommend looking at the shaft very carefully and see why the collar is even on there. I suspect there's damage to the tapered bore of the prop. Don't forget to lap the new prop to the shaft. |
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Crmaverick
Senior Member Joined: July-06-2019 Location: Central MA Status: Offline Points: 190 |
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What’s lap the prop to the shaft, is that putting in the key way? |
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Crmaverick
Senior Member Joined: July-06-2019 Location: Central MA Status: Offline Points: 190 |
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Maybe I’ll send this one back if I don’t like it, what do you recommend for a delta prop on a 454 2001? |
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KENO
Grand Poobah Joined: June-06-2004 Location: United States Status: Offline Points: 10669 |
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Let's hope somebody replaced that original 1 inch shaft with a 1 1/8 shaft somewhere along the way Otherwise it'll be a loose sloppy non fit Hopefully a prop puller is in the order too, no fair beating on the old one with a hammer. Good talking to you earlier today I guess you won't need my loaner prop to try |
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Crmaverick
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Thanks yeah I saw that they were used on the barefoot 454 so I figured safe to order. I did order the puller and hardware kit |
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KENO
Grand Poobah Joined: June-06-2004 Location: United States Status: Offline Points: 10669 |
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They're not used on many direct drive Barefoot 454's at all since forward would be reverse and vice versa.
And .....................the direct drive Barefoot 454's had a one inch shaft. Hope you got it right |
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Crmaverick
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Hmm well the 425 I got is a LH 1 1/8 shaft. Would a 13x12 prop have more top end speed than a 13x13? |
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8122pbrainard
Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41040 |
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Acme actually recommends the procedure. |
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JoeinNY
Grand Poobah Joined: October-19-2005 Location: United States Status: Offline Points: 5693 |
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We are talking about 400 hp at 5100 ish rpm LH engine in a 2001 - acme 431 is the correct prop. Unfortunately mine didn't survive more than a day or two before I destroyed it, but worked great while it was on.
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8122pbrainard
Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41040 |
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Joe, What happened to the prop? Did it flatten out? Throw blades? |
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