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Old 28 July 2013, 05:05   #1
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Jet RIBs?

Hi,

I'm fairly new to ribbing, but borrowed a friends a few times and I'm hooked!

Looking for a 4m-ish RIB in the region of 2000-4000. It's mainly for fun family days out on the lake.

I've seen a few Zodiac jet boats, they seem quite cheap compared to outboard counterparts, and wondered if there are any particular problems with them I should be aware of?

I assume that if the motor breaks it isn't as easy as just swapping out an outboard, which I guess is one reason they are cheaper, but how hard is it to get a replacement?

Are there any other particular issues that relate to jet boats?

Many thanks

Matt
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Old 28 July 2013, 05:18   #2
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Originally Posted by bownessie View Post
Hi,

I'm fairly new to ribbing, but borrowed a friends a few times and I'm hooked!

Looking for a 4m-ish RIB in the region of 2000-4000. It's mainly for fun family days out on the lake.

I've seen a few Zodiac jet boats, they seem quite cheap compared to outboard counterparts, and wondered if there are any particular problems with them I should be aware of?

I assume that if the motor breaks it isn't as easy as just swapping out an outboard, which I guess is one reason they are cheaper, but how hard is it to get a replacement?

Are there any other particular issues that relate to jet boats?

Many thanks

Matt
Small jet ribs a pretty hopeless things and only really used as big yacht tenders. Do you want ruffty tuffty or soft and squidgy?
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Old 28 July 2013, 05:34   #3
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Originally Posted by Mollers View Post
Small jet ribs a pretty hopeless things and only really used as big yacht tenders. Do you want ruffty tuffty or soft and squidgy?
I appreciate the reply. To be honest it's only be going to be for fun running up and down Windermere with family so I'm not bothered about tackling big sea swells and fighting the waves in some very manly way (as tempting as that sort of thing is!).

I just really want to know if I'm going to get myself into a lot of maintenance issues buying a jet rather than outboard.

Cheers

Matt
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Old 28 July 2013, 05:43   #4
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Hi Matt,

Jets can make a huge wake compared to the equivalent outboard / prop, it would be the same maint costs as an inboard, but with to prop or gearbox to look after (ours have a reduction box as opposed to gear)

But I'm sure a more detailed answer will come along.
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Old 28 July 2013, 05:45   #5
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Small jet ribs a pretty hopeless things and only really used as big yacht tenders. Do you want ruffty tuffty or soft and squidgy?
+1

When they go wrong they can be a pain to put right.

Wouldn't touch the smaller jet RIBs. IMHO they're a pain to drive at slower speeds bit like a jet ski with a tube round it !
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Old 28 July 2013, 06:16   #6
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Jets can make a huge wake compared to the equivalent outboard / prop,
Anyone explain the physics of that?
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Old 28 July 2013, 06:23   #7
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probobly to do with trim more than anything.

They are a nightmare to keep in a straight line, and my experiance is from a Halmatic Pacific 32, certainly not a light boat!
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Old 28 July 2013, 07:08   #8
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Anyone explain the physics of that?
More prop wash, not wake Mr Pedantic. ;-)
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Old 28 July 2013, 09:47   #9
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Jet drives create no more wake than standard prop-driven boats; why would they? Jet drives are less efficient though because of the need to turn helical thrust into linear thrust via the drive's stator vanes. The maneuverability of any jet-driven craft is unbelievable; we've all seen the Ocean Dynamic video. The small jet-drive ribs won't have a gear box so that's one less thing to go wrong. Most people on this forum don't like jet drives because they hate jet skis. And they hate jet skis because secretly they know they're the future of ribbing. Oh yes.
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Old 28 July 2013, 10:11   #10
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Jet drives create no more wake than standard prop-driven boats; why would they? Jet drives are less efficient though because of the need to turn helical thrust into linear thrust via the drive's stator vanes. The maneuverability of any jet-driven craft is unbelievable; we've all seen the Ocean Dynamic video. The small jet-drive ribs won't have a gear box so that's one less thing to go wrong. Most people on this forum don't like jet drives because they hate jet skis. And they hate jet skis because secretly they know they're the future of ribbing. Oh yes.
I run a rib and a ski, skis are fantastically easy to manoeuvre - my current unit ( RXP260 ) has fly-by-wire forward, neutral and reverse, all at the your finger tips - brilliant to helm. Regards the comment ' hating jet skis ' - unfortunately there's idiots on every type of watercraft
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