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Discussion Starter · #1 ·
Sorry guys but I bet this question rises a lot but jet boats are not common here in Australia and the hull I have is not seen in these parts.
I have a Daytona eliminator and I am looking to put a lighter engine in it. It's currently running a extremely heavy marine cast iron mercruiser engine with heat exchange cooling but slightly modified for better hp to run the three stage jet.
Where do I start on locating a engine and using the water directly to cool it?
It's seems to be a performance hull and I want the the thing to do just that.
The only thing it has going for it is killer roosts but with the weight of the engine (900lbs I think) it is hard to get out of the water.
Any tips will be appreciated please.
 

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Discussion Starter · #2 ·
Sorry guys but I bet this question rises a lot but jet boats are not common here in Australia and the hull I have is not seen in these parts.
I have a Daytona eliminator and I am looking to put a lighter engine in it. It's currently running a extremely heavy marine cast iron mercruiser engine with heat exchange cooling but slightly modified for better hp to run the three stage jet.
Where do I start on locating a engine and using the water directly to cool it?
It's seems to be a performance hull and I want the the thing to do just that.
The only thing it has going for it is killer roosts but with the weight of the engine (900lbs I think) it is hard to get out of the water.
Any tips will be appreciated please.
I am trying to upload a picture for people's opinions for what I should put in this boat. I hope it work's.
 

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Discussion Starter · #6 ·
Thanks for the links guy's it's great.
I got the boat as a shell and put a Hamilton 773 pump on it from nz with extra impellers and nozzles. The hull is from USA and I wanted something different here in Australia. I built the trailer out of a caravan. The engine I got from a marine company and they done some work to match the jet but it is too heavy so I wouldn't mind selling it for a lighter engine and get rid of the closed circuit cooling.
 

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The water runs through three impellers before its discharged.
I assume the 3 stage pump is why the boat is having a hard time. My 21 runs 70 plus with only about 500 hp. Until now mine was the slowest 21 tona on here:)grn
Sorry...couldnt resist....welcome to the madness:thumb:
 

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Discussion Starter · #9 ·
I assume the 3 stage pump is why the boat is having a hard time. My 21 runs 70 plus with only about 500 hp. Until now mine was the slowest 21 tona on here:)grn
Sorry...couldnt resist....welcome to the madness:thumb:
It's all good mate, this is half the fun and a great learning curve for me.
I don't have a problem with speed it's just takes a very long time to break 70mph
I have been looking at the lsx engine or 400ci old school with alloy heads plus Bassett pipes coming from the state's but I will keep researching and if I need to replace the jet I can easy
 

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It's all good mate, this is half the fun and a great learning curve for me.
I don't have a problem with speed it's just takes a very long time to break 70mph
I have been looking at the lsx engine or 400ci old school with alloy heads plus Bassett pipes coming from the state's but I will keep researching and if I need to replace the jet I can easy
Sounds like it moves pretty good. I love my daytona. There is are a few ls powered boats on here.

There is a guy that posts on here that put a ls motor in a liberator 21' (like a daytona)

I imagine getting rid of the closed cooling will shed a few pounds in itself.

Most of us are running old school bigblocks.

If you have any questions....or need measures/dimensions on my set up feel free to ask.

I personally would love to see what that 3 stage pump looks like out the back of that boat.
 

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Discussion Starter · #11 ·
Sounds like it moves pretty good. I love my daytona. There is are a few ls powered boats on here.

There is a guy that posts on here that put a ls motor in a liberator 21' (like a daytona)

I imagine getting rid of the closed cooling will shed a few pounds in itself.

Most of us are running old school bigblocks.

If you have any questions....or need measures/dimensions on my set up feel free to ask.

I personally would love to see what that 3 stage pump looks like out the back of that boat.
Thanks I appreciate it mate. I am so confused which way to go with a replacement engine but I will just keep looking at ideas.
I have a picture of the pump on the boat and another when I was doing work on it. The three impellers are at different pitches increasing from front to back.
 

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Discussion Starter · #14 ·
Great looking boat. I'll be watching to see what you end up with.
Thanks mate. We don't see any boats like this here and when I see one on tv I had to have it and it is so much fun.
I will have to get a engine from the state's because they don't built them here like you guys do or make it a project for myself.
 

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I love hamiltons. this video was posted on another thread. pretty cool

Thanks mate. We don't see any boats like this here and when I see one on tv I had to have it and it is so much fun.
I will have to get a engine from the state's because they don't built them here like you guys do or make it a project for myself.
 

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Discussion Starter · #16 ·
That is a awesome clip and that looks the same as the river here.
It looks like he was running a very old 750 Hamilton pump. Very short and compact for shallow rough rivers but speed is compromised.
Those guys are crazy but it's great to see them try to battle that river.
 

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What is your ultimate goal for the boat? I would assume you have good access to the GM LSx engine from a Holden. Might be worth doing a little research. FormulaZR has a pretty reliable LSx in his Liberator. There are a few guys around here that have made the switch.

http://www.performanceboats.com/jet-boats/105427-efi-383-ls1-liberator-lives.html

EDIT: Should have read first. You already stated almost everything I just said in a previous post.
 

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Discussion Starter · #18 ·
What is your ultimate goal for the boat? I would assume you have good access to the GM LSx engine from a Holden. Might be worth doing a little research. FormulaZR has a pretty reliable LSx in his Liberator. There are a few guys around here that have made the switch.

http://www.performanceboats.com/jet-boats/105427-efi-383-ls1-liberator-lives.html
Light weigh and brisk acceleration because the rivers and lakes here are small.
I never thought of that. I could get a damaged Holden commodore with a engine that has low miles. They are a 6L ls2, so I think that is 355 ci I could get some performance part for additional hp.
That is a great suggestion thanks and I will do some research on that engine.
The jet requires 300+ hp to turn so it should be easy. I think I can get parts from the U.S. to marinise it.
 

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That is a awesome clip and that looks the same as the river here.
It looks like he was running a very old 750 Hamilton pump. Very short and compact for shallow rough rivers but speed is compromised.
Those guys are crazy but it's great to see them try to battle that river.
Yea that was the grand canyon in the early 80's

 
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