Land & Sea drive Extension.
 

Land & Sea drive Extension.

I talked to a few people about my boat and they say that it likes the drive set back rather than raising the drive height. But installing a stelling box would interfere with the swim platform. so I was thinking about a land & sea extension. I heard some good things about them and also heard some people spent a lot of $$$ with not much to gain. My question is how much stress do they put on the drive if any and what kind of power can the hold. This would be going on a 28 Scarab with a single 575 -600 HP engine. Also I have a IMCO single ram steering. What do I have to do to the steering to compensate for the set back of the drive???

I just took two Stern Jacks off my 38' They are basically an aluminum box that you mount to the bell housing with long studs. The steering and trim cylinders must be modified. The Trim cylinder rams are cut and you have to weld on an extension tube. The steering may differ from manufacturer to manufacturer. Mine had a Latham setup that when the sternjacks were put on they provided a special setback plates and rodends and clevises. This was so you just use the standard mount and steering cylinder. During installation the input drive shaft is detached at the U Joint and then you put their new yoke on the old drive and then use your old driveshaft to go back into the coupler basically a swap of a few parts.

I removed mine because I needed to get stronger drives and the new IMCO SC's I bought were not known to work with the stern jacks.

The way I understand it the sternjack works well on smaller boats but not as dramatic on larger boats like my 38' Here is a picture of the steering setup.

I will be selling them if you are interested but at this time I need to inspect them and figure out what else would be needed from land and sea like gaskets and such to make the sellable.

The installation manuals are online at their website

Hey Raypanic, I have a friend that may be interested in the other extension, let me know how much once you know, Thanks Dwight

Whitey,

No problem, the nice thing is I have the trim cylinders that are allready welded up and in working order. (I put brand new ones on the new setup) This will make the install basically a bolt on deal. I will let you know.

Can you give details of the differences you saw, before and after?

Sorry Brad, I bought the boat with them on it. - No Idea

L&S and steering.....
 

Hot Boat,
you might want to speak with Full Throttle Marine in TX. They are, as we speak, doing one of these setups with Mayfair steering. They have finished one with excellent results I believe. They may be able to help you out with sales and install issues.
Ask for Bob at 830-693-5591
Dave
:D

Thanks guys for the help. :)

What you are saying is that the trim rams and steering rams have to be cut and extended???? Do they supply the parts to do so or is this done by a local welder????

Ray I would love to buy a set from you but currently its not in the budget. But I would like to know roughly what it is going to cost me to install a used one.

If any one has installed one , if you can please post what kind of results you seen.

Hot Boat,

The trim ram extenders are included with the kit but they are simply just tubes that you have to cut the ring off the trim ram and have someone weld in between. I would guess about 5 Hours for an install If the mechanic can weld. I will e-mail you the installation instructions.

P.S. Email me your E-mail address

Hot Boat
Sounds like your looking for 1 stearn jack.If thats the case I have have got you covered.I have a complete assembly including extended rams for Bravo 1 drive, also filled in the land & Sea logo on sides and painted them Merc. black . If interested .

Hey Brian and Ray

How much do you want for one of these?

I,m asking $ 1500 plus shipping cost have everything plus manual. Stern Jack was us ed for about 35 hours in perfect condition.

Hey Brian

What did you have them on, and what kind of results? Did you have to change props? Did it clear the swim platform, or is there a way to limit travel so it doesn't hit?

I it on a 1989 Checkmate 25 Convinser .Its hard to say what gains came from the stern jack I repowered from 330hp to 450hp at the same time but I did gain about 15 mph.Had no clearence problems.

15 MPH sure seems like a lot from 120 HP upgrade. I would have to think the combo of the two "woke up" the boat.

I am getting ready to drop in a new motor and I have a Stern Jack sitting in the box.

I am going to do a GPS run with the stock 7.4 MPI, then do the same run with the new motor (about 200HP more), then put on the Stern Jack so I can see what the results are for each.

Should be interesting...I will post when I get it all done.

hotboat

there is a complete land and seas bravo extension on ebay. It is at $700 and no bids yet.

I installed one on a 26 POwerQuest and saw no speed increase at all!! Ialso tried several differant props but no help. I guess it depends on the hull design.

I go away for a few days and I have 16 post. Thanks everyone for the help. Currently I am just contemplating on the Idea. I am still waiting for the motor to be installed in the boat, I would like to do the land & sea in the next few months, after the motor is broken in or over the winter. I remember seeing a add. in some magazine where land & sea posted there results on specific hulls. it varied considerably. from 2 - 10 mph depending on the hull. I believe mine would be a good candidate for 3 - 4 mph. but who knows

Thanks for all the help

On there website they show actual boat tests. demonstrating before and after installation speeds:

http://www.land-and-sea.com/marine/s...ck_results.htm

Thanks Ray. There is a 28' wellcraft at the bottom. I assume it is the same boat as mine and it got a 5 mph speed increase. This is something I will defiantly be getting in the future.