Is it possible to change sx drive to duo prop?

shipfaced · **Joined:** Sat May 07, 2011 10:10 pm **Posts:** 8

Calling on you experts out there to let me know if it's possible to change my Volvo penta 5.7 sx drive to a duo prop even if it means changing drives( if that's even possible). I just feel
Like a duo prop would help docking and backing in my slip. I've seen newer 238's than mine with duo props.Can this be done?
Shipfaced

P.S. Shipfaced is a 1997
[IMG]http://i1261.photobucket.com/albums/ii587/mscottcook/boatforifourwinns.jpg[/IMG]

Paul I. · **Posted:** Tue Jan 31, 2012 2:46 pm

I have never heard of it being done, but who am I?? NO ONE!! I think the amount of $$$ would not be worth it. It could be the same cost or a little more for a newer boat with counter rotating props. The two props alone are about $1,000 for a set.

The Kid · **Posted:** Tue Jan 31, 2012 2:49 pm

Absolutely!!! Especially easy (not cheap) being a Volvo.. the upper half of the drive is the same on a SX and DP drive.. so all it involves is changing the lower half of the drive and then getting the props pitched right. We have done it on a few 298 Vistas and it has made a huge difference!!!

ric · **Posted:** Tue Jan 31, 2012 2:57 pm

Do you know how amazing it would be to have DP on my H180 with a 3.0? hahahaha

aguyindallas · **Posted:** Tue Jan 31, 2012 5:31 pm

ric wrote:

Do you know how amazing it would be to have DP on my H180 with a 3.0? hahahaha

Your boat would do wheelies.

ric · **Posted:** Tue Jan 31, 2012 6:42 pm

aguyindallas wrote:

ric wrote:

Do you know how amazing it would be to have DP on my H180 with a 3.0? hahahaha

Your boat would do wheelies.

If it's that easy I'm going to search for one at the salvage yards!!

Paul I. · **Posted:** Tue Jan 31, 2012 8:46 pm

The Kid wrote:

Absolutely!!! Especially easy (not cheap) being a Volvo.. the upper half of the drive is the same on a SX and DP drive.. so all it involves is changing the lower half of the drive and then getting the props pitched right. We have done it on a few 298 Vistas and it has made a huge difference!!!

"ABOUT" how much per drive to change it??

I saw you at the Newport Boat Show. What a show that is!!!! I loved to 30 footer you guys had there!

shipfaced · **Joined:** Sat May 07, 2011 10:10 pm **Posts:** 8

O.k now the big question how much?? Ive had shipfaced for 2 seasons now and before i splash this season I will be servicing the drive and changing my bellows so im going to look into it. It would be awesome. Has anyone done this or even heard of doing it?
To splurge or not to splurge??
Shipfaced

ric · **Posted:** Tue Jan 31, 2012 9:40 pm

$6158 plus shipping for the complete conversion kit without props for a small block engine. Apparently the SX and DP-S share the same upper, it's just the lower gear assembly that's different. SWEET!!!!

SX to DPS conversion kit:
http://www.marinepartsexpress.com/cobraconversion.htm
Each kit contains the following items: Intermediate Shaft, Bearing Retainer, Quad Ring, SX-C1, 2 0-Rings, Water Pickup Tube Grommet, Water Pickup Tube, Tube Retainer, Seal, Anode (w/ screws and washers) and the entire lower gear assembly.

Install yourself, shouldn't be hard. I'd look for a used one, probably find a lower for under 3k.

TX H210SS · **Joined:** Thu May 27, 2010 9:10 am **Posts:** 1488

Holy Cash Batman. That sound like a deal breaker for me. Cheaper to buy a 20hp outboard and mount it at the bow for backing up. Boat would handle like a forklift.

ric · **Posted:** Tue Jan 31, 2012 10:14 pm

TX H210SS wrote:

Holy Cash Batman. That sound like a deal breaker for me. Cheaper to buy a 20hp outboard and mount it at the bow for backing up. Boat would handle like a forklift.

20hp? You're nuts. Pick up one of those small self contained outboard.. like a old Nissan NS3.5a. Had one on my 12ft steel jon boat. Moved it like scalded dog and weighed 28lb fueled up. Roughly 150lb thrust. That'll dock just about anything.

Paul I. · **Posted:** Tue Jan 31, 2012 10:36 pm

ric wrote:

$6158 plus shipping for the complete conversion kit without props for a small block engine. Apparently the SX and DP-S share the same upper, it's just the lower gear assembly that's different. SWEET!!!!

SX to DPS conversion kit:
http://www.marinepartsexpress.com/cobraconversion.htm
Each kit contains the following items: Intermediate Shaft, Bearing Retainer, Quad Ring, SX-C1, 2 0-Rings, Water Pickup Tube Grommet, Water Pickup Tube, Tube Retainer, Seal, Anode (w/ screws and washers) and the entire lower gear assembly.

Install yourself, shouldn't be hard. I'd look for a used one, probably find a lower for under 3k.

I did not think that the upper unit could be used. So I was thinking that the total cost plus labor would be in the 10 to 12k range. I am sure that the $6158 will turn into $6.5 to 7k add labor $1,500. Is it worth it?? If you needed a drive, yes, but just to do it. Or put the money into a newer boat.

powellcrazy · **Posted:** Sun Feb 05, 2012 7:01 am

yes it can be done as already posted. When my friend bought his H200, it came from FW with DP, to get price where he wanted, dealer offered to swap out DPS with an SX. That made the deal. Takes a good mechanic a few minutes to swap..... If mechanic had to split upper / lower outdrive and reassemble with new DPS lower half, maybe couple hours with a break!

I personally thought friend was nuts going backwards to a SX..... but he go a boat

If you could find entire used DPS, could swap drives in less than an hour and have a back up drive.....
This would be as easy, remove hyd rams, 6 nuts holding drive to transom housing, swap

DPS would make you boat more desirable come time to sell.

LouC · **Posted:** Mon Feb 06, 2012 1:29 pm

The DP would be a great conversion, the issue is the cost of the lower unit and the props. As long as you can get all the bolts loose that hold the upper and lower units together, it should not be a hard job. Once you get out those bolts, the only things holding the units together are the o-rings and the water tube gaskets, as long as the splines for the driveshaft are not rusted.

Cap'n Morgan · **Posted:** Sat Feb 11, 2012 7:51 am

Here you go.

http://detroit.craigslist.org/mcb/boa/2827869323.html

www.iFourWinns.com

Is it possible to change sx drive to duo prop?

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