21' Scarab Prop Selection
#21
Thread Starter
Registered
Joined: Oct 2022
Posts: 282
Likes: 89
From: WI
Good find - I find a lightly used 4B B1 28" prop, I am talking with the seller and should hopefully be able to pick it up. You mentioned solid hub, from my understanding, is that not required when you are talking about higher horsepower applications? Ive read that 400hp is the line between rubber and solid hubs. Would love to know more, as the props im looking at are all solid
#22
VIP Member

Joined: Jun 2021
Posts: 3,503
Likes: 2,131
From: SW Ohio
Good find - I find a lightly used 4B B1 28" prop, I am talking with the seller and should hopefully be able to pick it up. You mentioned solid hub, from my understanding, is that not required when you are talking about higher horsepower applications? Ive read that 400hp is the line between rubber and solid hubs. Would love to know more, as the props im looking at are all solid
Personally, I prefer the props with a sacrificial hub. It's pretty much just a failsafe to prevent breaking or bending the shaft. Yes, at some point, HP/torque is going to dictate a solid hub. I don't think there's anything wrong with either, aside from overpowering the sacrificial hub.
I posted this Mirage Plus because I think your boat is going to be happier with it than the Bravo. This is merely an opinion based on empirical experience with our Rinker. As I understand it, the Bravos are considered "lifting" props, and I'd bet your hull doesn't need any transom lift, and, in fact, will ride wet like our Rinker did.
Thanks. Brad.
(937)545-8991
#23
Thread Starter
Registered
Joined: Oct 2022
Posts: 282
Likes: 89
From: WI
Checkmate,
Personally, I prefer the props with a sacrificial hub. It's pretty much just a failsafe to prevent breaking or bending the shaft. Yes, at some point, HP/torque is going to dictate a solid hub. I don't think there's anything wrong with either, aside from overpowering the sacrificial hub.
I posted this Mirage Plus because I think your boat is going to be happier with it than the Bravo. This is merely an opinion based on empirical experience with our Rinker. As I understand it, the Bravos are considered "lifting" props, and I'd bet your hull doesn't need any transom lift, and, in fact, will ride wet like our Rinker did.
Thanks. Brad.
(937)545-8991
Personally, I prefer the props with a sacrificial hub. It's pretty much just a failsafe to prevent breaking or bending the shaft. Yes, at some point, HP/torque is going to dictate a solid hub. I don't think there's anything wrong with either, aside from overpowering the sacrificial hub.
I posted this Mirage Plus because I think your boat is going to be happier with it than the Bravo. This is merely an opinion based on empirical experience with our Rinker. As I understand it, the Bravos are considered "lifting" props, and I'd bet your hull doesn't need any transom lift, and, in fact, will ride wet like our Rinker did.
Thanks. Brad.
(937)545-8991
#25
VIP Member

Joined: Jun 2021
Posts: 3,503
Likes: 2,131
From: SW Ohio
All of mine have been some sort of hard plastic that pressed into the prop and a brass (?) insert that splined on the shaft and keyed into the plastic sacrificial hub.
While I've never needed any of it, I keep a spare prop, sacrificial hub, brass insert, a couple castle washers and prop nuts on the boat.
Thanks. Brad.
(937)545-8991
Last edited by Brad Christy; 04-12-2023 at 04:44 PM.
#26
Thread Starter
Registered
Joined: Oct 2022
Posts: 282
Likes: 89
From: WI
The 3 blade seller never responded. Ended up buying a standard Bravo 1 28" - figured it's a safe enough point to get me on the water then I can start experimenting. I'll do more research on hubs, but leaning towards solid due to some of the stories I've heard with the non-solids
#27
Registered

Joined: Mar 2020
Posts: 846
Likes: 507
Don't sweat the replaceable hubs like the Flo Torq from merc. Those can use a plastic for lower HP or they have a "solid" aluminum one for the higher HP engines. Either one can be installed/replaced into the prop.
https://www.ebay.com/itm/31207122832...3ABFBM_Lmr6fJh
I specifically will not use the "old style" rubber hubs any longer. Those are what i was having problems with.
They look like this. https://www.ebay.com/itm/36413309060...Bk9SR7y6zenyYQ
https://www.ebay.com/itm/31207122832...3ABFBM_Lmr6fJh
I specifically will not use the "old style" rubber hubs any longer. Those are what i was having problems with.
They look like this. https://www.ebay.com/itm/36413309060...Bk9SR7y6zenyYQ
#28
Be very careful with the 4 blade we built a 22 Scarab with a 525 and bravo shorty on ITS and could not run a 4 blade it would pick the back of the boat up and bow steer badly. we ended up with 27 pitch 3 blade mirage
#29
VIP Member

Joined: Jun 2021
Posts: 3,503
Likes: 2,131
From: SW Ohio
This is still my thinking, only higher in pitch.
Thanks. Brad.
(937)545-8991
#30
Thread Starter
Registered
Joined: Oct 2022
Posts: 282
Likes: 89
From: WI
Don't sweat the replaceable hubs like the Flo Torq from merc. Those can use a plastic for lower HP or they have a "solid" aluminum one for the higher HP engines. Either one can be installed/replaced into the prop.
https://www.ebay.com/itm/31207122832...3ABFBM_Lmr6fJh
I specifically will not use the "old style" rubber hubs any longer. Those are what i was having problems with.
They look like this. https://www.ebay.com/itm/36413309060...Bk9SR7y6zenyYQ
https://www.ebay.com/itm/31207122832...3ABFBM_Lmr6fJh
I specifically will not use the "old style" rubber hubs any longer. Those are what i was having problems with.
They look like this. https://www.ebay.com/itm/36413309060...Bk9SR7y6zenyYQ



