Does anybody know if its ok to run a Jacuzzi 12yj jet in the driveway to
tune up the engine? Is there any seals that need to worry about running dry?
If so is there a way to run water to the critical parts?

You should never run any marine engine dry. No water flowing to cool
the engine, no water running to cool the exhaust manifold.

Well thats swell but if you read the subject or my original post I was
asking about running the jet without water, not the motor,of course I would
T into the raw water inlet for the heat exchanger with a garden hose so the
motor didn`t overheat.

Again, does anybody know about the Jacuzzi 12yj and if its ok to run it on
the trailer, or if there is a way to conect a hose to it so it is ok to test
run??

"Capt John" wrote in message
oups.com...
You should never run any marine engine dry. No water flowing to cool
the engine, no water running to cool the exhaust manifold.

R Mac wrote:

Well thats swell but if you read the subject or my original post I was
asking about running the jet without water, not the motor,of course I would
T into the raw water inlet for the heat exchanger with a garden hose so the
motor didn`t overheat.

Again, does anybody know about the Jacuzzi 12yj and if its ok to run it on
the trailer, or if there is a way to conect a hose to it so it is ok to test
run??

"Capt John" wrote in message
oups.com...

You should never run any marine engine dry. No water flowing to cool
the engine, no water running to cool the exhaust manifold.


I often wonder why sea-doos don't come standard with a fire hose
connection on the jet outlet. What a way to get smoke jumpers to a
fire by a lake, eh?

Running the jet pump with no water shouldn't hurt it for a while,
but might there be a water seal on it's drive shaft which needs to
be cooled?

Terry K

By all means, Yes! The best way to fix a 'personal watercraft' is to run it
for about an hour in your driveway, no water needed, especially if you
habitually use it anywhere near fishing grounds.

Brian



"R Mac" wrote in message
news:TRJve.102800$El.64220@pd7tw1no...
Does anybody know if its ok to run a Jacuzzi 12yj jet in the driveway to
tune up the engine? Is there any seals that need to worry about running
dry?
If so is there a way to run water to the critical parts?

Another post from someone who obviously gets off on the sound of their own
typing.
If you took the time to read the original post and had a clue you would
realize that a 12yj isn`t for a PWC.
This is in fact a river fishing boat I am trying to get going.

"Brian D" wrote in message
...
By all means, Yes! The best way to fix a 'personal watercraft' is to run
it
for about an hour in your driveway, no water needed, especially if you
habitually use it anywhere near fishing grounds.

Brian



"R Mac" wrote in message
news:TRJve.102800$El.64220@pd7tw1no...
Does anybody know if its ok to run a Jacuzzi 12yj jet in the driveway to
tune up the engine? Is there any seals that need to worry about running
dry?
If so is there a way to run water to the critical parts?

What everyone is trying to tell you is don't do it. If their is a seal
where the prop shaft exits the hull it probably needs to be run in
water to cool it, it's not getting cooled in air. For very brief
periods of time you might get away with it, but not for very long.

On Mon, 27 Jun 2005 02:52:35 +0000, R Mac wrote:

Does anybody know if its ok to run a Jacuzzi 12yj jet in the driveway to
tune up the engine? Is there any seals that need to worry about running dry?
If so is there a way to run water to the critical parts?

Common-sense wise, it is very hard for me to believe that you could run a
water jet dry without ruining it.

I mean, fish can't breathe air, birds can't fly in water, land animals
can't breathe water, airplanes can't fly underwater, and submarines can't
fly in air.

Just my quick thoughts on the topic.

--Mac

As you see, it often helps to ask the question in such a manor as would get you the answer you're looking for.
"How do I run a Jacuzzi 12yj jet equipped marine engine in my boat (river fishing boat, not PWC) in my driveway (on a trailer) without damaging either motor or jet?" That should eliminate most of the "trolls".
Now to the problem, not that I have the real solution, but I have some experience on jet boats, but I have destroyed a lot of good stuff in the last half century, so I do know of what I speak.

Lets start with some clarification:
Is it a Jacuzzi 12yj jet (neat) or a Jacuzzi 12yj jet Golden Eagle?
Does the marine engine get its coolant from the jet auxiliary water outlet?

What would I do? I'd remove the Impeller X Cut No. 4906 (1 of 10 different cuts)
and re assemble. Then T into the coolant line. Then, I'd probably discover that when I turned on the water, most of it went out the jet intake, so I'd block that and discover that most of it was going out the thrust nozzle so I'd block that (allowing some to flow so that everything is cool in the jet housing.

That could work, but remember "I have destroyed a lot of good stuff in the last half century" but I have also fixed a lot of broken stuff that "they" said couldn't be done (usually because I broke it first).

The first thing I would do is get the service manual or at least go to the local Jacuzzi authorized repair facility and ask what they do to get around this problem. Asking us, would show questionable reasoning abilities on your part. I mean really, would you trust the knowledge and advice of a news group when four out of five responses don't address the problem or just keep saying you cant do it?
Go slow and Good luck
Shawn

"R Mac" wrote in message news:TRJve.102800$El.64220@pd7tw1no...
| Does anybody know if its ok to run a Jacuzzi 12yj jet in the driveway to
| tune up the engine? Is there any seals that need to worry about running dry?
| If so is there a way to run water to the critical parts?
|
|

Mungo Bulge wrote:
As you see, it often helps to ask the question in such a manor as would get you the answer you're looking for.
"How do I run a Jacuzzi 12yj jet equipped marine engine in my boat (river fishing boat, not PWC) in my driveway (on a trailer) without damaging either motor or jet?" That should eliminate most of the "trolls".
Now to the problem, not that I have the real solution, but I have some experience on jet boats, but I have destroyed a lot of good stuff in the last half century, so I do know of what I speak.

Lets start with some clarification:
Is it a Jacuzzi 12yj jet (neat) or a Jacuzzi 12yj jet Golden Eagle?
Does the marine engine get its coolant from the jet auxiliary water outlet?

What would I do? I'd remove the Impeller X Cut No. 4906 (1 of 10 different cuts)
and re assemble. Then T into the coolant line. Then, I'd probably discover that when I turned on the water, most of it went out the jet intake, so I'd block that and discover that most of it was going out the thrust nozzle so I'd block that (allowing some to flow so that everything is cool in the jet housing.

That could work, but remember "I have destroyed a lot of good stuff in the last half century" but I have also fixed a lot of broken stuff that "they" said couldn't be done (usually because I broke it first).

The first thing I would do is get the service manual or at least go to the local Jacuzzi authorized repair facility and ask what they do to get around this problem. Asking us, would show questionable reasoning abilities on your part. I mean really, would you trust the knowledge and advice of a news group when four out of five responses don't address the problem or just keep saying you cant do it?
Go slow and Good luck
Shawn

"R Mac" wrote in message news:TRJve.102800$El.64220@pd7tw1no...
| Does anybody know if its ok to run a Jacuzzi 12yj jet in the driveway to
| tune up the engine? Is there any seals that need to worry about running dry?
| If so is there a way to run water to the critical parts?
|
|