DI good or BAD?

[Johnson8537]

Ok guys i just sold my 97 SPX and 97 GTX

Looking for a single ski now that is comparable to the SPX.

Fun out of the Hole... easy on fuel and nible.


What ski should i get?? I know Money how much... under 7K


I was looking in to a XP-DI heard they get 37% better fuel economy.
But i heard they can be a PITA... is that true?

I figured i would ask the Guru's....


thanks guys

 

[nswillin]

If it was me. I would not buy a DI engine, too many problems. If you want to spend some money go and buy one of the new 4 tecs. Pretty good engines and set up is totally different than the two strokes. But...... if some should go wrong it would be harder to work on than a two stroke.

Look at the XP's with the 951 engine. Awesome power, really fast, easy to work on.

 

[kustomkarl]

:agree: If you going to upgrade go to a 4-tec with a intercooling system if you ride in the salt water. You might spend a little more but it won't be in the shop as often and will last longer... for a lot less in the long run.

Karl

 

[Johnson8537]

It will only see FRESH water whatever i decide.

What year XPs are the best? Are they going to act as my SPX did?
Any other skis to look for?

 

[nswillin]

I like the 99 and up. Get ready to hold on and go fast. They are real tipsy so its not very fun riding with two people and you will tip over the first time you try it.
I think next year I'm gonna sell mine and get a new 2009 GTX. Lot of power and a little more stable. I'm kinda getting over the XPs.

 

[Johnson8537]

I like the 99 and up. Get ready to hold on and go fast. They are real tipsy so its not very fun riding with two people and you will tip over the first time you try it.
I think next year I'm gonna sell mine and get a new 2009 GTX. Lot of power and a little more stable. I'm kinda getting over the XPs.

have you ridden an SPX? I had gotten fairly good at riding 2 up with it even able to spin and not dump either mysefl or the rider.
I assume the XP being a foot longer will be about the same stability wise?

Anyone know that has ridden both??


Sounds like i will stay away from the DI

 

[seadoosnipe]

DI?.......

I agree with all.........no DI engines.

I don't want to put any down that own them, if they are in good running condition, but the compressors are a PITA to trouble shoot.........:cheers:

 

[Seado]

I am new to jetski's and to this site and was on the verge of buying my first Jetski, a 2001 RX-DI with 40hrs, when I read this.

Why are the DI's not reccommended? Is it a 951 with fuel injection, or is it a completely different motor?

What is a compressor and why is it a PITA to diagnise a faulty one on a DI?

The reason I want a RX, is that it seems quite stable (Won't tip over as a XP, or am I mistaken?).

I can also get a 2002 GSX. Is that also a DI engine, or what engine does it have? What horsepower does it make?

I really want to thank guys like Kustomkarl and Seadoosnipe for their expert advice!

 

[seadoosnipe]

Oribital injection....

The DI motor uses oribital injection on the high pressure side of the compression stroke. It has many components including an air compressor, regulator, fuel pump and a recirculation system with pressure controlled valves. There have been several owners of this type injection system (DI) who have voiced their complaints on finding a solution to their problem, with limited success.

If you have one that is in good working condition, then you'll probably be very happy. From what I hear, when it's running nice, it's a hot motor. But if you have a problem, it's really hard to trouble shoot.

If you have no experience with this ski or don't really know the owner, I'd shy away from it. The 951 RFI or carbed motor is hot too........the biggest 2 stroke motor Rotax has to offer in the PWC 2 stroke motor.......:cheers:

 

[Seado]

I hope that I am not going to regret going against your advice, but I have decided to buy the RX-DI!.

It is in an excellent condition with 41 hours on the clock (or so the previous owner told me! How do I read the hours on the instrumentation?)

According to you guys, the compression should be about 150psi. I tested it at the dealer and it showed that both cylinders have a compression of 102psi. I wasn't happy with this reading, so they testerd a brand new 3D with the same motor and their gauge indicated again 102psi for both cylinders! Either their gauge is wrong, or something else is amiss.

I then took it for a test ride and it clocked 62 mph on the speedo, which seems about right, taking into account my 240lb weight.

I therefore hope that I shall have a couple of enjoyable hours with it, before the problems start!

 

[nswillin]

Thanks for the update. Give us a shout if you have any problems or let everybody know if it's going good. :cheers:

 

[Nate Surveyor]

OK, I will possibly go out on a limb, and not know what I'm talking about, but, at least I am warning you!

I do not know if that model has the gray fuel lines, but if it does, I think it may cause injector troubles. I mean the whole fuel system could be hurt by them. I know the carbureted ones don't like the gray lines. And I am sure the Injection ones would not like it either.

So, somebody chime in, and let us know 2 things: Do the DI models have gray fuel lines, and if so, do you think they will hurt it?

Thanks!

Nate

 

[seadoosnipe]

Compression?.......

Welcome to the world of Seadoo..........congrats on your new purchase. I hope you have a DI model that is well seasoned and running good. If it ran well when you test drove it, then you have a better than 60% chance that you won't have any problems in the near future.

The compression sounds bad. I question the statement of the gage being off because a mechanic doesn't keep a bad compression gage. You can go to Advanced Auto Parts or Autozone and get a compression gage for about $20 bucks or so. If I were you, I'd do a check on the cylinders yourself. You may as well buy one now. Your going to need it for future reference anyway. Then, do your own compression test, then post the results. Also, start a log and do compression tests one a season at a minimum to know where the health of your cylinders are every year during your yearly maintenance.:cheers:

 

[Nate Surveyor]

Sniper is right. Those nums are the sound of a worn out motor. :agree:

Definitely get your own gauge.

N

 

[Dans97challenger]

I am with these guys but truthfully my Challenger is at 110 and 112 and it runs incredible and has outstanding power still. So I guess it also depends on how the motor was maintained. My compression is a little low too but if it read 102 on the used bike and 102 on the brand new bike his guage is definitely broken.