31 gallon fuel tank run time

You don't give enough information to answer this honestly.

I think the Ford and Chevy small blocks tend to burn 8-9 gallons per hour at 3000rpm, if I remember some of the old data sheets (mostly data sheets on EFI engines from the 1990s and early 2000s). That would be about 3 hours of continuous run time at that speed with a 10% reserve.

Unless the day was flat calm and I were just cruising on a big lake, I'd never operate that way for that amount of time. I think some of these engines can burn 2-3 three times that amount at wide open throttle.

John,
Did you retrofit the 31 gal. tank into 66?

Wow no way would I take a ski Nautique out that crooked inlet. I've run many days and nights thru there, Sebastion separates the boy boats from the man boats.

I worked all last summer on the 1715 fleet wrecks in a 16 foot shamrock ski boat with a 80hp diesel in it and blower that only did 10 mph max.Had no problems going thru sebastian inlet.I dont think ill have any problems with my boat that will do 40mph+ going in an out of that inlet.Ive seen 40 and 50 foot commercial king fish boats get sideways in the inlet before.Plus some of my other treasure hunting friends in their boats with big diesel detroits get in a little trouble there.But none have capsized.Im far from being new to boating.I also own a 37 foot all aluminum striker sportfish but dont use it for treasure hunting,just diving and salvage work in the past.Ill prolly be doing fishing tournaments with it after i get it painted inside and out.I havent put a 31 gallon tank in the nautique yet.trying to find out what the fuel burn is first then decide what size tank would be suitable for it.

That 17' shamie is far superior to any Ski Nautique for those conditions and Shamrock never made a ski boat, to the best of my knowledge.

Here is a pic of the shamie i worked last summer.It orginally had a chevy 350 in it that died and someone put a underpowered diesel yanmar 80hp in it with the wrong pitched prop.

Orlando76 wrote: That 17' shamie is far superior to any Ski Nautique for those conditions and Shamrock never made a ski boat, to the best of my knowledge.

Oh yes they did says so right in their brochure. That by the way is a 20'   Walk Thru just like mine. The only 17 they made is a center console,like the one Reid has.

Are you planning to mount all that gear on the '66 Ski? How about some pictures of the boat, love to see it!

I actually think the Shamrock is a very cool boat. Out of curiosity, why didn't you just re-power it since it's all set up for your purposes?

Heres some pics of my 1966 correctcraft.The windshield is so clear you cant even see it.

The gear thats going on my nautique is this 18 inch blower.I have to modify this one to fit plus make some brackets to hold it.It only weighs 20lbs.Also ill be adding some bigger cleats to the port and starboard stern and next to them will be sailboat rope winches,the type with the removable hand crank to tighten up 2 stern anchors.

You lower that pipe like in the last picture start her up put it in gear and the prop wash blows away the sand allowing you to find your treasure. Once you have gold fever there is no cure.
As a side note doesn't the Fishers own the rights and lease them out for a cut on the take?

Also very doubtful any pattons from that many years ago would have any restrictions on the use of prop thrust re directional devices.

shierh wrote: Also very doubtful any pattons from that many years ago would have any restrictions on the use of prop thrust re directional devices.

Talking about owning salvage rights not patents

I'd like to be able to tip the duct upside down so the outlet faces upward, could have the first Fountain Nautique at the sandbar.

I assume that is removed for driving to and from the dive site. Is there also some sort of extension to get to deeper water or does doing that from the surface give you enough clearing power. I am with Hollywood - craziest ski nautique application ever.