Alloy jet
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Alloy jet
Just finnishing one of our little boats for a local client. 14'6", 175hp Mercury Sportjet. Does a bit of hunting in more remote areas hence the cage over the engine cover. He'll take it away to fit and finnish then I should see it back in a couple of months.
Blanks fitted in the mount holes for the cage
The cage
Blanks fitted in the mount holes for the cage
The cage
- JETTYWOLF
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Re: Alloy jet
Ya ever wonder why Honda, know for thier 4 stroke engines has not come out with something exactly like the Merc sportjet?
I have. Is it because a "jet" needs to be connected to a "chainsaw, weed eater" type motor to get the rev's??
Don't believe so, because many big bad jetboats have Chevy 454 iron's under the hood.
Things that make ya say, Hmmm.
I have. Is it because a "jet" needs to be connected to a "chainsaw, weed eater" type motor to get the rev's??
Don't believe so, because many big bad jetboats have Chevy 454 iron's under the hood.
Things that make ya say, Hmmm.
- spoiled one
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Re: Alloy jet
The four stroke outboards don't provide the low end grunt that the two strokes do. This is essential in a jet that is required to get the boat out of the hole and plane out in a boat length. There are plenty of big block V-8s in the big jet boats, but they don't run the skinny water that a sport jet will.
Spending my kids inheritance with them, one adventure at a time.
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- welder
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Re: Alloy jet
Honda has up to a 105HP jet motor at this time> http://marine.honda.com/Products/modeldetail/BF105 < if the motor is matched to the boat correctly I think either motor will get the boat up on step PDQ.
Other things we look at when building these river beaters is...
1) Cost
2) Weight
3) Dealer support
4) See #3 again
5) Horse Power needed ( Honda doesn't make a bigger motor for that app.)
To each there own, run what ya brung.
Other things we look at when building these river beaters is...
1) Cost
2) Weight
3) Dealer support
4) See #3 again
5) Horse Power needed ( Honda doesn't make a bigger motor for that app.)
To each there own, run what ya brung.
Lester,
PacificV2325, Honda BF225
2386
PacificV2325, Honda BF225
2386
- JETTYWOLF
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Re: Alloy jet
That's not what I'm talking about Welder.
I'm talking about something like the merc sportjet.
Sorry....example off 2coolfishing, and reinforced plastic resin boat.
Once ya get away from two stroke 1200 hr. blow ups and buying TCW-111, ya just never want to go back.
(1. if you use the boat alot.
(2. See #1, again.)
C'mon
I'm talking about something like the merc sportjet.
Sorry....example off 2coolfishing, and reinforced plastic resin boat.
Once ya get away from two stroke 1200 hr. blow ups and buying TCW-111, ya just never want to go back.
(1. if you use the boat alot.
(2. See #1, again.)
C'mon
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Re: Alloy jet
Not guite as lw down as you'd expect as most pumps won't place much significant load on the motor 'till 2000rpm. The good part about jets is that the load to the motor is exactly the same regardless of boat load, and the best part is the manouverability you get at low speed.spoiled one wrote:The four stroke outboards don't provide the low end grunt that the two strokes do. This is essential in a jet that is required to get the boat out of the hole and plane out in a boat length. There are plenty of big block V-8s in the big jet boats, but they don't run the skinny water that a sport jet will.
All those jetsprint boats have large V8 motors and are up on plane within their own length. Most of my boats use a V8 and waterjet combo and are used up shallow rivers, some even V6, although there is a move towards smaller 11' boats using jetski powertrain in them.
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Chevrolet LS364/440 (Carb'ed LS2, 440hp)
Re: Alloy jet
Hey Speed Boats:
Thanks for sharing your pictures. When I use my imagination to picture what a speedy jet boat should look like, the imagine is just like your boats. They really look great!
Mike
Thanks for sharing your pictures. When I use my imagination to picture what a speedy jet boat should look like, the imagine is just like your boats. They really look great!
Mike
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Re: Alloy jet
Here's some vid of the boat. It was the new owners 2nd time out, so a more sedate river was called for. Unfortunately the Go-Pro we had onboard was flat so the footage is from a handycam and smart-phone, which we go bored with holding so missed alot of the better bits.
You'll have to excuse the guy with the hand gesture, it would seem he didn't wish to appear on camera...
http://www.youtube.com/embed/yGxVhjdanfE
Coming down the river...
http://www.youtube.com/embed/9c3JFWSG4gg
You'll have to excuse the guy with the hand gesture, it would seem he didn't wish to appear on camera...
http://www.youtube.com/embed/yGxVhjdanfE
Coming down the river...
http://www.youtube.com/embed/9c3JFWSG4gg
Last edited by speedboats on Wed Mar 06, 2013 8:27 pm, edited 1 time in total.
- welder
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Re: Alloy jet
She came out reel nice and sounds good.
I like the Bloody Decks Salute.
I like the Bloody Decks Salute.
Lester,
PacificV2325, Honda BF225
2386
PacificV2325, Honda BF225
2386
Re: Alloy jet
Do you always have the river to yourself...saw a red boat tied up and maybe a float in the bushes further on? You were going down river where would you end up? What river? Thta is pretty cool...good video and sounds nice as Les said. What was the speed? THX for sharing.
2009 Raider 185 Pro Fisherman, 2005 90Yamaha, 2012 Yamaha9.9HT, 2008 EzLoader roller, 2004 Dodge TCD dually, 2005/2015 Lance1161
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Re: Alloy jet
No we don't always get the river to ourselves, however there isn't a huge amount of traffic either. The Red / Orange boat belongs to the local tour operator there, and as we had a couple of cruise ships in harbour they were booked to take 200pax up the river the following day. The river can be quite boring as it's a non-technical drive however is scenic as it meanders its way to the river mouth and into the Pacific Ocean.
Here is the google earth address of the tour operator (Kaituna River Jet)
37°49'51.18" S 176°23'41.55" E
You will see a smaller river that flows into the Kaituna just a little down stream to the operators jetty, we did manage a trip up there (no camara as we got bored of holding it), touched some rocks twice. It was a little more difficult to boat (still comparatively easy to other rivers) with a few shallow sections and gorges that would have been about 17' wide (we were only just able to turn the boat around in one), Water was suprisingly clear being 3' deep in places but able to clearly see the pebbles on the river bottom (as strange as it may seem that is not real common around here as NZ intensively farms and we get alot of run-off of nitrates and phosphates into our rivers, that is when farmers aren't pumping all the water for irrigation). It is a trout spawning stream and we could well see a few trout 'duck for cover' as we boated past.
The boat only achieves 52mph, which is fine for what it is with the 175 Sportjet. Pump is a little small when you have 5 big-block guys like me on board, but was intended for the owner to get to the upper reaches of rivers to areas inaccessable by road to go hunting (mostly deer and pig) and then bring them all out, hence the removable 'game cage' over the engine cover. However he has decided that the boat is a little small for what he wants so is selling this one to get our bigger 4.8m model with an 8 1/4" pump and possibly Chev LS2 motor (that'll lift 5 big-block guys while towing a skiier!).
Here is the google earth address of the tour operator (Kaituna River Jet)
37°49'51.18" S 176°23'41.55" E
You will see a smaller river that flows into the Kaituna just a little down stream to the operators jetty, we did manage a trip up there (no camara as we got bored of holding it), touched some rocks twice. It was a little more difficult to boat (still comparatively easy to other rivers) with a few shallow sections and gorges that would have been about 17' wide (we were only just able to turn the boat around in one), Water was suprisingly clear being 3' deep in places but able to clearly see the pebbles on the river bottom (as strange as it may seem that is not real common around here as NZ intensively farms and we get alot of run-off of nitrates and phosphates into our rivers, that is when farmers aren't pumping all the water for irrigation). It is a trout spawning stream and we could well see a few trout 'duck for cover' as we boated past.
The boat only achieves 52mph, which is fine for what it is with the 175 Sportjet. Pump is a little small when you have 5 big-block guys like me on board, but was intended for the owner to get to the upper reaches of rivers to areas inaccessable by road to go hunting (mostly deer and pig) and then bring them all out, hence the removable 'game cage' over the engine cover. However he has decided that the boat is a little small for what he wants so is selling this one to get our bigger 4.8m model with an 8 1/4" pump and possibly Chev LS2 motor (that'll lift 5 big-block guys while towing a skiier!).