I'm Broke and Stuck!!!

[Maclin]

Re: I'm Broke and Stuck!!!

Aluminum gives up sooner and takes up more of the shock than SS in most hits, that means not as much shock is delivered to the hub and that means even less gets delivered to the propshaft. Theoretically. I must add that, in my opinion, my choice of running aluminums is the only reason I have not had to fix my lower from hitting rock-bottom at speed.

 

[Home Cookin']

Re: I'm Broke and Stuck!!!

some say less apt to cause corrosion issues.

That's a new one.

Not that it matters on a trailer boat.

 

[jkust]

Re: I'm Broke and Stuck!!!

Frankly I dont know how it gets started that and aluminum prop will protect the drive train better that steel.

I'll venture a guess then that it started here in MN where it is reality not theory.

 

[oldjeep]

Re: I'm Broke and Stuck!!!

I'll venture a guess then that it started here in MN where it is reality not theory.

Truth - I've hit rocks solidly enough to actually stop the engine and fold a prop blade completely over, so I'm not sure what it actually takes to spin a hub. (Idle speed in a channel on Minnetonka)

 

[bgc]

Re: I'm Broke and Stuck!!!

Missing the point, hub spins before drive damage. What your seeing is the prop goes before the hub.
I work on outdrives 5 days a week and we have limestone, shale, slate, and clay bottoms.

 

[oldjeep]

Re: I'm Broke and Stuck!!!

Missing the point, hub spins before drive damage. What your seeing is the prop goes before the hub.
I work on outdrives 5 days a week and we have limestone, shale, slate, and clay bottoms.

And that is some mighty soft rock. Rocks in the lakes here tend more towards the granite variety. It is fairly well known around here that drives can get damaged when hitting rocks with a stainless prop. Its not something we are making up, it actually happens.

 

[tincanman]

Re: I'm Broke and Stuck!!!

Glad to see it all worked out for you. Be nice to the ol' girl for a few dates till you get to know her a bit. don't just go slaming her around on the first date.

 

[Home Cookin']

Re: I'm Broke and Stuck!!!

"The hub is NOT there as a sacrificial part, it's to help control vibration. "

That's another new one. But since it's on the internet it must be true.

And some rocks are softer than others, and that makes a difference? PLease.

 

[oldjeep]

Re: I'm Broke and Stuck!!!

"The hub is NOT there as a sacrificial part, it's to help control vibration. "

That's another new one. But since it's on the internet it must be true.

And some rocks are softer than others, and that makes a difference? PLease.

A prop will break a soft rock

 

[jkust]

Re: I'm Broke and Stuck!!!

And that is some mighty soft rock. Rocks in the lakes here tend more towards the granite variety. It is fairly well known around here that drives can get damaged when hitting rocks with a stainless prop. Its not something we are making up, it actually happens.

There's one lake in particular we like where try as I might, I just can't get to and from the ramp withougt going through the sand. I swear I'm trimmed up enough even though it is shallow and when I get out the prop is slightly damaged. It just slightly chips the aluminum prop edges and there I'd love the SS prop. Instead I just switch from my new Aluminum to my spare aluminum for the day that has hit a few things lightly. At the end of the day, who wouldn't want a nice, shiny ss prop on their boat but for us practicality wins out over desire. The whimpy 190hp I've got wouldn't see much if any benefit over a decent aluminum prop IMO anyway.

 

[bgc]

Re: I'm Broke and Stuck!!!

"The hub is NOT there as a sacrificial part, it's to help control vibration. "

That's another new one. But since it's on the internet it must be true.

And some rocks are softer than others, and that makes a difference? PLease.

TRUE, and it gives during a strike to help protect the drive. A step above the old shear pins as you can usually keep going. With anything, hit it to hard and it will break. I have yet to see a lower or upper fail for normal use with the correct prop because the hub did not give (excluding the racing engines or solid hubs). My lowers hop up when I'm digging in soft limestone.

"Both have rubber bushings, that took the place of the shear pins, to protect the drive train. Frankly I dont know how it gets started that and aluminum prop will protect the drive train better that steel. The bushing absorbs shock and will give when the load is great enough, be it steel or aluminum."

"Missing the point, hub spins before drive damage. What your seeing is the prop goes before the hub.
I work on outdrives 5 days a week and we have limestone, shale, slate, and clay bottoms."

http://www.solas.com/newweb/propeller/products/access.asp

 

[Insteada]

Re: I'm Broke and Stuck!!!

SS vs Aluminum here on the Mississippi as well is an argument. The way it was explained to my little brain was that while what everyone is saying about a strike when the prop hits a rock while spinning will usually cause the hub to give before drive damage, what protects the drive against the forward (or backward) momentum of the boat? There is no give on an SS forward/backward and the hub isn't really helping there, right? I know in many cases the drive will pop up but won't there already be significant force applied? Whereas if you drag that Alum prop forward over the rocks and catch the prop that way it will bend/shear AND you will have the protection that the hub provides as a second layer.

Don't know if that's totally the reason but I found it to be a quality argument. Thoughts?

 

[Home Cookin']

Re: I'm Broke and Stuck!!!

often but obviously not always the skeg hits the object and that protects the prop and lifts the engine (for an outboard). of course the shape of the rock matters, too.

 

[Jlawsen]

Re: I'm Broke and Stuck!!!

Is the prop still on? If it's still on the hub might be spun.

Bingo..