prop for 2310 parker

[RLA69]

I bought a powertech ofx4 15x15.25 stainless and i'm not impressed.Maybe i need to raise the motor or maybe i bought the wrong pitch.It was probably not as good as the three blade it replaced around the dock.Mid range cruising i think it was pretty good and top end a little slower although it spun at 6000 rpm's trimmed out. I ran with a full tank,and three guys in almost flat conditions so i'm not sure what will happen in rough water like i usually see at the cbbt.I bought it hopeing for better bite around the docks,these bracketed parkers seem to slide instead of turning especially in reverse around the docks.I do know to trim up some in reverse but it didn't respond any better with this new prop.I don't plan on giveing up on this prop just yet but my first thoughts were to put the other prop back on.Any ideas?

 

[jeffnick]

And your motor is?

 

[Bryan 2530]

6000? You could probably step up the pitch to a 17 and be dialed in.

 

[RLA69]

And your motor is?

06 F225

 

[RLA69]

And your motor is?

06 F225

Someone suggested the 15.25 x15 may be a bit small for the f225

 

[RLA69]

6000? You could probably step up the pitch to a 17 and be dialed in.

Would the 17 pitch give more or less bite,i know where i could get an ofs4 with that pitch but i'm not sure if it would be better or not.

 

[sparky]

More pitch (higher number) is more bite.

 

[Parker 2310]

I have the 2310 with a OX66 225 and i run the 15x17 three blade. I dont have any problems with it, reverse in the marine going into my slip i just give her a little more room to get the momentum going, she will slid with the wind. On windy days i am better off pulling, that way i dont get too loud after a failed attempt.

 

[Marty D]

HI,
You need a 17 in prop. If you keep your boat near IR Inlet you can try using my prop that I have up for sale. See if its works for you.
Marty D

 

[gdelolach]

RLA69

We are sorry you are experiencing a problem with your prop, but maybe I can give you some insight into what is going on.

When you went from a three bladed prop to a four blade, you obviously added blade surface area. That is counter to what you need to have on a prop that will back more effectively. Actually, the best prop for backing up would be a single bladed prop. Of course no-one makes one of those. So the reality is, your three blade prop should have backed better than your four blade. Everything you do when propping a boat has a trade off. You can get a better hole shot but lose top end speed. You can get more speed but probably lose hole shot and bite in corners.

You seem to be very concerned about maneuverability around docks. The only way you are going to get there is with a prop that, most likely, will suffer in hole shot, mid-range, and rough water handling. The same grip that most people talk about when it concerns a prop does not equate to better grip while in reverse. When spinning a prop in reverse, you are using the back of the blade to move the boat. There is nothing on the back of a prop blade to assist with gripping the water like there is on the front of the blade (cupping). The cupping that helps with prop “grip” while going forward, causes aeration while backing.

Additionally, with a wide flat transom, like those on Parkers, there are other issues that enter into the picture. You said that you have a bracket on your boat. When backing a boat with a bracket, the reverse thrust cannot get under the boat as easily as it could without the bracket, if mounted low enough. All of that water hits the transom and actually works against the motor and prop. That is why it is better to trim out while backing. The transom also acts like a wall and resists any change in direction.

I think the best you are going to be able to do is to find a prop that has a reasonable trade off to help with backing, but still provide good performance in other areas. My suggestion would be to find a three bladed prop that will get the right rpm’s at top speed and still provide good rough water performance and mid-range cruising. At that point, you will likely have to live with the backing characteristics of the boat/motor/prop setup.

If you would like to talk with one of our tech support specialists, please call PowerTech! at 1-800-736-7767.

George

 

[RLA69]

RLA69

We are sorry you are experiencing a problem with your prop, but maybe I can give you some insight into what is going on.

When you went from a three bladed prop to a four blade, you obviously added blade surface area. That is counter to what you need to have on a prop that will back more effectively. Actually, the best prop for backing up would be a single bladed prop. Of course no-one makes one of those. So the reality is, your three blade prop should have backed better than your four blade. Everything you do when propping a boat has a trade off. You can get a better hole shot but lose top end speed. You can get more speed but probably lose hole shot and bite in corners.

You seem to be very concerned about maneuverability around docks. The only way you are going to get there is with a prop that, most likely, will suffer in hole shot, mid-range, and rough water handling. The same grip that most people talk about when it concerns a prop does not equate to better grip while in reverse. When spinning a prop in reverse, you are using the back of the blade to move the boat. There is nothing on the back of a prop blade to assist with gripping the water like there is on the front of the blade (cupping). The cupping that helps with prop “grip” while going forward, causes aeration while backing.

Additionally, with a wide flat transom, like those on Parkers, there are other issues that enter into the picture. You said that you have a bracket on your boat. When backing a boat with a bracket, the reverse thrust cannot get under the boat as easily as it could without the bracket, if mounted low enough. All of that water hits the transom and actually works against the motor and prop. That is why it is better to trim out while backing. The transom also acts like a wall and resists any change in direction.

I think the best you are going to be able to do is to find a prop that has a reasonable trade off to help with backing, but still provide good performance in other areas. My suggestion would be to find a three bladed prop that will get the right rpm’s at top speed and still provide good rough water performance and mid-range cruising. At that point, you will likely have to live with the backing characteristics of the boat/motor/prop setup.

If you would like to talk with one of our tech support specialists, please call PowerTech! at 1-800-736-7767.

George

Thanks for the detailed info,i appreciate it and now understand the problem better.When i read other posts about better bite around the docks i assumed they were talking about reverse as well as forward.I can and have managed around the docks even in crowded conditions just not as easily as my other boats.I also trim the motor to get some water under the transom and that does help.I like the prop at cruise and it gets up to the proper rpm's with just a bit slower at top end. I spend most of my time at cruise so i'll just live with the way the boat responds in reverse.