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Old 28 March 2011, 17:54   #21
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Country: USA
Town: San Diego
Boat name: Stormbringer
Make: Avon Searider 5.4
Length: 5m +
Engine: 90hp Mariner
Join Date: Oct 2008
Posts: 89
Hard Deck Dims

jwn74, I have an aluminum hard deck and roll up deck you can measure. I am in San Diego, so you can get the exact dimensions then go and buy your marine plywood.
PM me and i will send you my email.
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Old 29 March 2011, 23:00   #22
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Country: USA
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Boat name: Avon 5.4
Make: Avon
Length: 5m +
Engine: 60hp Merc
Join Date: Jan 2011
Posts: 18
Quote:
Originally Posted by captnjack View Post
They suck up weeds like mad. To the point of needing to tilt the motor and rake them off. We used a hand held garden tool for this job, its surprisingly hard to reach back there while on the water. Rocks not so much unless you are in water so shallow the tubes are scuffing.

Performance wise most jets lose about 20% of the rated HP compared to a prop. In my experience with them they are quite inefficient in the mid-range too. Its idle or full throttle.

Unless you have a specific need for a Jet (running in rivers or around swimmers as a rescue boat) I would stick with a conventional prop.
I had an E-Tech 40hp with a DuraJet lower on a Zodiac F470. I never had a weed problem but I tend to steer clear of the weedy patches anyway.

I agree with Captnjack- if you don't need a jet for reasons stated above then you are better off with a nice stainless prop. The performance will be better with a prop. We were doing some night ops with swimmers in the water so the added safety of the jet was a plus.

Attached please find some tech specs (propaganda from the jet folks) on the prop Vs. jet.
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Old 30 March 2011, 01:40   #23
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Country: Canada
Town: British Columbia
Make: Gemini
Length: 4m +
Engine: 40hp 2 str
Join Date: Oct 2003
Posts: 2,151
Quote:
Originally Posted by captnjack View Post
They suck up weeds like mad. To the point of needing to tilt the motor and rake them off. We used a hand held garden tool for this job, its surprisingly hard to reach back there while on the water. Rocks not so much unless you are in water so shallow the tubes are scuffing.

Performance wise most jets lose about 20% of the rated HP compared to a prop. In my experience with them they are quite inefficient in the mid-range too. Its idle or full throttle.

Unless you have a specific need for a Jet (running in rivers or around swimmers as a rescue boat) I would stick with a conventional prop.

Thanks Captain! I am really thinking about getting an ETEC 65 commercial (rope start, tiller) for my boat once I need to replace the current motor. Was concerned about the weight of a 240 lb etec on a 470 but it seems to be the norm for military applications nowadays.
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Old 30 March 2011, 13:34   #24
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Country: USA
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Boat name: Water Dog
Make: Polaris
Length: 4m +
Engine: Yamaha 60hp
Join Date: Apr 2007
Posts: 1,152
Quote:
Originally Posted by tmuenster View Post
I had an E-Tech 40hp with a DuraJet lower on a Zodiac F470. I never had a weed problem but I tend to steer clear of the weedy patches anyway.

I agree with Captnjack- if you don't need a jet for reasons stated above then you are better off with a nice stainless prop. The performance will be better with a prop. We were doing some night ops with swimmers in the water so the added safety of the jet was a plus.

Attached please find some tech specs (propaganda from the jet folks) on the prop Vs. jet.
The "Durajet" is really more like a Kort nozzle on a prop than a Jet. Agree its probably better for those who just want swimmer/diver protection. Performance-wise it looks pretty damn good too. For shallow water running where there are logs and stumps in your river, this is what I meant by "Jet".
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Old 30 March 2011, 16:42   #25
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Country: USA
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Boat name: Avon 5.4
Make: Avon
Length: 5m +
Engine: 60hp Merc
Join Date: Jan 2011
Posts: 18
Quote:
Originally Posted by captnjack View Post
The "Durajet" is really more like a Kort nozzle on a prop than a Jet. Agree its probably better for those who just want swimmer/diver protection. Performance-wise it looks pretty damn good too. For shallow water running where there are logs and stumps in your river, this is what I meant by "Jet".
Ah, yes, a Yamaha Outboard Jet lower will come at cost in HP. The benefit is running in much more shallow water than an Etech DuraJet or traditional outboard.

I have another boat that was made by RiverPro. It will run in 3" of water at 50mph. The bottom is thick aluminum that is made for harsh river conditions. Basically it is a Jon boat with 200 hp jet. Merc put the 250hp Optimax power head on the jet drive just to get the 200 hp output. That's a 20% loss of power and the inboard jet drive system is much more effecient than a outboard jet drive system. The RiverPro is the best boat I have ever seen on a river but it was not designed for big water or open water. It is a rough ride in big waves. I've got my wife talked into letting me keep the RiverPro and my project SeaRider 5.4 for the lakes.
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Old 31 March 2011, 00:52   #26
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Country: Canada
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Make: Zodiac
Length: 4m +
Engine: outboard 55
Join Date: Mar 2011
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55 military vs 65 commercial Etec

I have an older 55 Evinrude on F470 with hard deck. I have had several of these boats. I had a Merc 50 4 stroke, a Johnson military 30 horse and a Honda for a short time. I have run 25's and 15's on smaller Zodiacs. I have been diving off of these for many years and barely get on step with a full load and 4 stroke. I like the look and theory of the jet drive, and they suggest no loss of power, but I would not want to gamble. If I did, perhaps someone with experience would know if there is a way to adjust the pitch like with a more conventional prop? My fellow Winnipeger is right on the money, the 2 stroke etec 65 is a 240 lb motor with a great hole shot. They will want $7200 new, and no one stocks it in Canada yet. My transom handled a 50 4 stroke easy, but you need to keep the boat tight. (which is tricky when the lake freezes over night).
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Old 31 March 2011, 13:00   #27
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Country: USA
Length: 4m +
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Sorry to go off topic, but I was thinking of upgrading to one of these types of boats. I currently have a Futura MKII. How do these boats handle rough water compared to something like I have? I sure would love to have the additional space!
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Old 03 April 2011, 14:19   #28
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Make: Zodiac
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MkII vs F470

I went from MkI to F470 10 years ago. Night and day. On the lakes there is a hugh difference in the chop. You will need to trailer or crane the F470 if you launch solo as you will cause damage doing it alone. The MkI sits and will likely sit until the kids want to play with it. The only disadvantage is weight and price. Excellent for diving.
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Old 20 April 2011, 22:42   #29
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Country: Canada
Town: GTA
Boat name: Zodiac
Make: Zodiac Futura MkIII
Length: 4m +
Engine: 50 HP ETec Tiller
Join Date: Aug 2010
Posts: 201
Hey Martini, Re. that bag, its definitely Zodiac. Their accessory line is branded Access. You can see in the pics there is an aluminum extrusion attached to the transom which has a tubular slot running its length. The bag has a cylindrical tag along the length of its back, like heavy piping, which slides into the aluminum thus securing it.
Guess I got lucky when they threw it in with the boat. Those MilPro boats look wicked!
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Old 21 April 2011, 12:56   #30
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Country: UK - England
Town: London
Boat name: Janey
Make: Zodiac
Length: 4m +
Engine: Outboard Yamaha 20hp
Join Date: Apr 2011
Posts: 47
Hi Guys,
These are the boats we use in the Marines. We use a Tohatsu 50 and they go like a rocket with just the coxswain in. Instead of fuel tanks we use Avon fuel bags and carry 4 which gives us a range of about 80nm.
Ours are Hypalon and weigh 650kgs with engine and fuel and are supposedly man portable. The aluminium hard floor is a major pain in the arse to fit, the roll up slatted deck with jump off board our preferred choice.
They come with a manual that says they're a militarized Zodiac fastroller Mk3 if that helps anyone.
They are majorly robust and take a hammering from us due to the nature of the job. They work brilliantly in surf due to the speed tubes.
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