Rigging a 94 21' superboat with a 260 what prop?

[scottistang]

Like the title says I'm going to be rigging my 94 21' superboat with a 4" set. Ack hydraulic gorilla jack plate and a 260 with a offshore can. Just looking for some input on what I should be running for a prop and what kind of speed I should see. I was thinking a 26p offshore to start? Any input would be greatly appreciated as I am new I the superboat scene Also Im not sure the height I am going to be running the prop shaft at yet as I ha net mounted the jack plate yet but plan on running it as high as possible

[sheermagic65]

Superboats need a 12" setback to start with and a low water pickup

[Superbender]

When I had a 260 on my boat,I ran a 24 et and 8inches of set back,but every boat is different your going to have to experiment a little.Which boat do you have,maybe some pics would be nice

[sheermagic65]

And the master is alive need that freakin bat number

[scottistang]

I will be running a sportmaster sorry I didn't mention that earlier. I plan to run the boat offshore a fair amount and from my understanding it will handle better with less set back.
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[dnelson964]

Then I assume you are replacing the OMC with a 2.5 merc 260? 1.87 gearing? You could go 8" like Superbender said and still handle very well plus allow higher engine height to boot !

An offshore, ET or HOSS HPD would be a good start.

Good luck ....it's a great performance boat !

I ran mine to Marths'a vineyard from montauk w/ 2.4 200 merc. so you should have no problem. :thumbsup:

[scottistang]

Yeah the omc was the first thing to go long gone now...putting a 2.5 260, offshore mid, 1.87 sporty lower with marine machine steering. I have everything minus a new set of gauges and side control. Going to plate the back and run angle on the inside for support.

[gm250]

And the master is alive need that freakin bat numberwho is the master and what is the bat number louie

[sheermagic65]

Don't give out our secrets superbender hands down the master

[scottistang]

What are everyones thoughts on just running the jack plate (4" set back) off the transom? Will I end up buying a stainless marine 7" to add to it?

[dnelson964]

All depends on your boats balance with YOUR setup. So you will tell us after you try it. ;)

[vnemous]

I would guess 8" would be a good compromise between top speed and handling in the ruff assuming your transom is in good shape. JMO

[Hoss Marine Propellers]

What are everyones thoughts on just running the jack plate (4" set back) off the transom? Will I end up buying a stainless marine 7" to add to it?

If the one on the boat is already a 4" plate, then I would try it first with the intention of going back 8-12" like everyone else said.
The bottom does not have a notch/cutback so you'll probably end up back a ways?
Get some good numbers with what you have & then everyone will be able to help with setup/props.