Fuel economy of older jet boats

"Mark" <mark.kempe.TakeThisOut@gmail.com> wrote in message
news:b5a6c0d2-40c2-4e38-b289-ab9209bb406e@c58g2000hsc.googlegroups.com...
> I'm seeing many older jet boats, say the 2000 sea-doo challenger 1800
> or 2002 sea-doo islandia for sale locally. What are the fuel economy
> on these older ones? Anyone know where you can find the information
> out? Someone told me they get 5 hours on a tank, but I see the have
> 41gal tanks, so they are burning 8 gal/hour?

Jet boats use more fuel that a similarly sized prop boat. It's less
efficient to push with a jet. I've heard numbers around 30% or so. They
are much safer and also are good if you boat in areas with a lot of shallow
water. But even with a prop boat expect the gas to be expensive. Boats use
a lot of gas. When we take out our 19 1/2' bow rider out on the lake it's
usually a 100 bucks or so if we make a whole day of it. We have a 760cc
yamaha jetski as well and it can run through some gas fast.
 >> Stay informed about: Fuel economy of older jet boats 

"jamesgangnc" <james RemoveThis @nospam.com> wrote in message
news:7eOdnbgnG5a0qPvVnZ2dnUVZ_jqdnZ2d@earthlink.com...
> "Mark" <mark.kempe RemoveThis @gmail.com> wrote in message
> news:b5a6c0d2-40c2-4e38-b289-ab9209bb406e@c58g2000hsc.googlegroups.com...
>> I'm seeing many older jet boats, say the 2000 sea-doo challenger 1800
>> or 2002 sea-doo islandia for sale locally. What are the fuel economy
>> on these older ones? Anyone know where you can find the information
>> out? Someone told me they get 5 hours on a tank, but I see the have
>> 41gal tanks, so they are burning 8 gal/hour?
>
> Jet boats use more fuel that a similarly sized prop boat. It's less
> efficient to push with a jet. I've heard numbers around 30% or so. They
> are much safer and also are good if you boat in areas with a lot of
> shallow water. But even with a prop boat expect the gas to be expensive.
> Boats use a lot of gas. When we take out our 19 1/2' bow rider out on the
> lake it's usually a 100 bucks or so if we make a whole day of it. We have
> a 760cc yamaha jetski as well and it can run through some gas fast.
>

My namesake came up with a winner when he developed the modern propeller.
They are amazingly efficient.

Eisboch
 >> Stay informed about: Fuel economy of older jet boats 

"Mark" <mark.kempe DeleteThis @gmail.com> wrote in message
news:b5a6c0d2-40c2-4e38-b289-ab9209bb406e@c58g2000hsc.googlegroups.com...
> I'm seeing many older jet boats, say the 2000 sea-doo challenger 1800
> or 2002 sea-doo islandia for sale locally. What are the fuel economy
> on these older ones? Anyone know where you can find the information
> out? Someone told me they get 5 hours on a tank, but I see the have
> 41gal tanks, so they are burning 8 gal/hour?

2000 is not that old. But the sea-doo types are very inefficient relative
to the bigger jet drives. The new Hamilton 212's are about 95% the
efficiency of props. And yes, the sea-doo's / jetski motors are famous for
fuel usage.
 >> Stay informed about: Fuel economy of older jet boats 

On Sat, 28 Jun 2008 04:27:51 -0700 (PDT), Mark <mark.kempe.TakeThisOut@gmail.com>
wrote:

>I'm seeing many older jet boats, say the 2000 sea-doo challenger 1800
>or 2002 sea-doo islandia for sale locally. What are the fuel economy
>on these older ones? Anyone know where you can find the information
>out? Someone told me they get 5 hours on a tank, but I see the have
>41gal tanks, so they are burning 8 gal/hour?

We have an example of the first jet boats sold in the US, a
turbocraft, SN 10. 1958 I seem to recall. Came with lifting eyes fore
and aft. You attached tow lines to the one and the anchor to the
other. Four clamshell vents at the gunnels. It came with a Graymarine
flathead six, 109 hp. My kid brother swapped in a Buick six that got
us 3700 RPM up from the 3200 we had been getting. Eighteen gallon
tank. Skiing it would go 3 hours or so. Neither engine was big enough
to drive the pump at rated engine speed and you can't change anything
out, like you can a prop or gearbox. So, many jet boats have a
mismatched drive train that may not be especially good for mileage. On
a small lake the actual top speed doesn't really matter much.

Casady
 >> Stay informed about: Fuel economy of older jet boats 

richardcasady.TakeThisOut@earthlink.net (Richard Casady) wrote in
news:4878e074.537140062@news.east.earthlink.net:

> you can't change anything
> out, like you can a prop or gearbox.

Simply not true. There are the same kinds of impeller pitches as there are
props.

http://solas.com/products/pwc/impeller/impeller.htm

Older jetboats also have different impeller pitches available but are
getting hard to find. Try a prop shop in your area...
 >> Stay informed about: Fuel economy of older jet boats 

richardcasady RemoveThis @earthlink.net (Richard Casady) wrote in
news:4878e074.537140062@news.east.earthlink.net:

> you can't change anything
> out, like you can a prop or gearbox.

Oh, about the SeaDooDoo Islandia powered by 2-stroke jetski engines....

Never talk about "mileage" around jetski-powered boaters. They just get
angry.

A properly tuned SeaDooDoo 2-stroker can eat 14 gallons per hour PER
ENGINE.

Don't forget to carry your VISA. You're gonna need it!

Though not as "cool", Mercury Sport Jet 2-strokers aren't so high
performance, trying to squeeze every rev out of a too-small jetski engine
whining away at high RPM to produce power. In a Sea Rayder 16' jetboat,
the 175hp, 6-cylinder Sport Jet will guzzle around 14-20 gallons a day,
especially if you drive it like you stole it or pull skiiers for hours.

Jet boats are VERY inefficient power plants for anyone interested in fuel
management.
 >> Stay informed about: Fuel economy of older jet boats 

On Jul 3, 2:31 pm, "Reginald P. Smithers III" <"Reggie is Here
"@yahoo.com> wrote:
> HK wrote:
> > Reginald P. Smithers III wrote:
> >> HK wrote:
> >>> Reginald P. Smithers III wrote:
> >>>> HK wrote:
> >>>>> Richard Casady wrote:
> >>>>>> On Wed, 02 Jul 2008 23:46:08 +0000, Larry <no... RemoveThis @home.com> wrote:
>
> >>>>>>> In a Sea Rayder 16' jetboat, the 175hp, 6-cylinder Sport Jet will
> >>>>>>> guzzle around 14-20 gallons a day, especially if you drive it
> >>>>>>> like you stole it or pull skiiers for hours.
>
> >>>>>> That statement is useless without a time factor better than 'per
> >>>>>> day',
> >>>>>> Eight hour day would be maybe 2 gallons per hour. I don't think that
> >>>>>> is what you meant.
>
> >>>>>> Casady
>
> >>>>> Really, and 14-20 gallons wouldn't be that much for any boater with
> >>>>> an engine around that size who ran at a high cruise or was pulling
> >>>>> tubes or skiers.
>
> >>>> You don't pull skiers, wakeboarders or tubes at high cruise.
>
> >>> Try reading the sentence again, braindead.
>
> >>> "...ran at high cruise *or* was pulling tubes or skiers."
>
> >> My experience is that pulling a skier/tube at 3000 rpm, or a
> >> wakeboarder at 2200 rpm would burn about the same or maybe slightly
> >> more than running at 3400 without towing anyone.
>
> >> What have you noticed when you are pulling skiers/wakerboarders and
> >> tubers?
>
> > What I noticed is you cannot properly decode a simple sentence.
>
> So are you saying there is  no appreciable difference between cruising
> at 3400 rpm and pulling water toys at 2200-3200?
>


Could be IMO. Depends on the boat and how it is powered.
 >> Stay informed about: Fuel economy of older jet boats 

On Jul 3, 3:58 pm, JimH <osu....TakeThisOut@oh.rr.com> wrote:
> On Jul 3, 2:31 pm, "Reginald P. Smithers III" <"Reggie is Here
>
>
>
> "@yahoo.com> wrote:
> > HK wrote:
> > > Reginald P. Smithers III wrote:
> > >> HK wrote:
> > >>> Reginald P. Smithers III wrote:
> > >>>> HK wrote:
> > >>>>> Richard Casady wrote:
> > >>>>>> On Wed, 02 Jul 2008 23:46:08 +0000, Larry <no....TakeThisOut@home.com> wrote:
>
> > >>>>>>> In a Sea Rayder 16' jetboat, the 175hp, 6-cylinder Sport Jet will
> > >>>>>>> guzzle around 14-20 gallons a day, especially if you drive it
> > >>>>>>> like you stole it or pull skiiers for hours.
>
> > >>>>>> That statement is useless without a time factor better than 'per
> > >>>>>> day',
> > >>>>>> Eight hour day would be maybe 2 gallons per hour. I don't think that
> > >>>>>> is what you meant.
>
> > >>>>>> Casady
>
> > >>>>> Really, and 14-20 gallons wouldn't be that much for any boater with
> > >>>>> an engine around that size who ran at a high cruise or was pulling
> > >>>>> tubes or skiers.
>
> > >>>> You don't pull skiers, wakeboarders or tubes at high cruise.
>
> > >>> Try reading the sentence again, braindead.
>
> > >>> "...ran at high cruise *or* was pulling tubes or skiers."
>
> > >> My experience is that pulling a skier/tube at 3000 rpm, or a
> > >> wakeboarder at 2200 rpm would burn about the same or maybe slightly
> > >> more than running at 3400 without towing anyone.
>
> > >> What have you noticed when you are pulling skiers/wakerboarders and
> > >> tubers?
>
> > > What I noticed is you cannot properly decode a simple sentence.
>
> > So are you saying there is  no appreciable difference between cruising
> > at 3400 rpm and pulling water toys at 2200-3200?
>
> Could be IMO.   Depends on the boat and how it is powered.

It also depends on many other factors such as number of passengers
aboard when doing 3400 rmp and pulling water toys at 2200 rpm.

All things being equal, I doubt pulling folks in water toys and in the
boat at 3200 rmp is the same fuel burn rate as cruising with with
those folks at 3400 rpm.
 >> Stay informed about: Fuel economy of older jet boats 

On Jul 3, 4:03 pm, JimH <osu....RemoveThis@oh.rr.com> wrote:
> On Jul 3, 3:58 pm, JimH <osu....RemoveThis@oh.rr.com> wrote:
>
>
>
> > On Jul 3, 2:31 pm, "Reginald P. Smithers III" <"Reggie is Here
>
> > "@yahoo.com> wrote:
> > > HK wrote:
> > > > Reginald P. Smithers III wrote:
> > > >> HK wrote:
> > > >>> Reginald P. Smithers III wrote:
> > > >>>> HK wrote:
> > > >>>>> Richard Casady wrote:
> > > >>>>>> On Wed, 02 Jul 2008 23:46:08 +0000, Larry <no....RemoveThis@home.com> wrote:
>
> > > >>>>>>> In a Sea Rayder 16' jetboat, the 175hp, 6-cylinder Sport Jet will
> > > >>>>>>> guzzle around 14-20 gallons a day, especially if you drive it
> > > >>>>>>> like you stole it or pull skiiers for hours.
>
> > > >>>>>> That statement is useless without a time factor better than 'per
> > > >>>>>> day',
> > > >>>>>> Eight hour day would be maybe 2 gallons per hour. I don't think that
> > > >>>>>> is what you meant.
>
> > > >>>>>> Casady
>
> > > >>>>> Really, and 14-20 gallons wouldn't be that much for any boater with
> > > >>>>> an engine around that size who ran at a high cruise or was pulling
> > > >>>>> tubes or skiers.
>
> > > >>>> You don't pull skiers, wakeboarders or tubes at high cruise.
>
> > > >>> Try reading the sentence again, braindead.
>
> > > >>> "...ran at high cruise *or* was pulling tubes or skiers."
>
> > > >> My experience is that pulling a skier/tube at 3000 rpm, or a
> > > >> wakeboarder at 2200 rpm would burn about the same or maybe slightly
> > > >> more than running at 3400 without towing anyone.
>
> > > >> What have you noticed when you are pulling skiers/wakerboarders and
> > > >> tubers?
>
> > > > What I noticed is you cannot properly decode a simple sentence.
>
> > > So are you saying there is  no appreciable difference between cruising
> > > at 3400 rpm and pulling water toys at 2200-3200?
>
> > Could be IMO.   Depends on the boat and how it is powered.
>
> It also depends on many other factors such as number of passengers
> aboard when doing 3400 rmp and pulling water toys at 2200 rpm.
>
> All things being equal, I doubt pulling folks in water toys and in the
> boat at 3200 rmp is the same fuel burn rate as simply cruising with
> those folks (no water toys) at 3400 rpm.

edit
 >> Stay informed about: Fuel economy of older jet boats 

On Wed, 02 Jul 2008 23:46:08 +0000, Larry <noone DeleteThis @home.com> wrote:

>In a Sea Rayder 16' jetboat,
>the 175hp, 6-cylinder Sport Jet will guzzle around 14-20 gallons a day,
>especially if you drive it like you stole it or pull skiiers for hours.

That statement is useless without a time factor better than 'per day',
Eight hour day would be maybe 2 gallons per hour. I don't think that
is what you meant.

Casady
 >> Stay informed about: Fuel economy of older jet boats 

Richard Casady wrote:
> On Wed, 02 Jul 2008 23:46:08 +0000, Larry <noone DeleteThis @home.com> wrote:
>
>> In a Sea Rayder 16' jetboat,
>> the 175hp, 6-cylinder Sport Jet will guzzle around 14-20 gallons a day,
>> especially if you drive it like you stole it or pull skiiers for hours.
>
> That statement is useless without a time factor better than 'per day',
> Eight hour day would be maybe 2 gallons per hour. I don't think that
> is what you meant.
>
> Casady


Really, and 14-20 gallons wouldn't be that much for any boater with an
engine around that size who ran at a high cruise or was pulling tubes or
skiers.
 >> Stay informed about: Fuel economy of older jet boats 

HK wrote:
> Richard Casady wrote:
>> On Wed, 02 Jul 2008 23:46:08 +0000, Larry <noone DeleteThis @home.com> wrote:
>>
>>> In a Sea Rayder 16' jetboat, the 175hp, 6-cylinder Sport Jet will
>>> guzzle around 14-20 gallons a day, especially if you drive it like
>>> you stole it or pull skiiers for hours.
>>
>> That statement is useless without a time factor better than 'per day',
>> Eight hour day would be maybe 2 gallons per hour. I don't think that
>> is what you meant.
>>
>> Casady
>
>
> Really, and 14-20 gallons wouldn't be that much for any boater with an
> engine around that size who ran at a high cruise or was pulling tubes or
> skiers.

You don't pull skiers, wakeboarders or tubes at high cruise.
 >> Stay informed about: Fuel economy of older jet boats 

Reginald P. Smithers III wrote:
> HK wrote:
>> Richard Casady wrote:
>>> On Wed, 02 Jul 2008 23:46:08 +0000, Larry <noone.RemoveThis@home.com> wrote:
>>>
>>>> In a Sea Rayder 16' jetboat, the 175hp, 6-cylinder Sport Jet will
>>>> guzzle around 14-20 gallons a day, especially if you drive it like
>>>> you stole it or pull skiiers for hours.
>>>
>>> That statement is useless without a time factor better than 'per day',
>>> Eight hour day would be maybe 2 gallons per hour. I don't think that
>>> is what you meant.
>>>
>>> Casady
>>
>>
>> Really, and 14-20 gallons wouldn't be that much for any boater with an
>> engine around that size who ran at a high cruise or was pulling tubes
>> or skiers.
>
> You don't pull skiers, wakeboarders or tubes at high cruise.


Try reading the sentence again, braindead.

"...ran at high cruise *or* was pulling tubes or skiers."
 >> Stay informed about: Fuel economy of older jet boats