AmandaFreeman

Hi Everybody,

I've been reading a lot on this forum for the past few weeks but have never posted. So impressed with the knowledge on here.

I am looking at buying two PWC's; one is a 2006 Sea Doo RXT and the other is a Sea Doo RXP. An '06 Zieman trailer comes with it as do covers for the skiis. Everything is super clean and is being offered at $12,000.

As I'm a single mom of two teenagers, I wanted something semi-low maintenance and durable. We are all experienced riders. Am I making the right decision?

Any input would be great.

Amanda

Arctic

Just pointing out some facts here for you.
Both of those skis are supercharged. The superchargers on those require maintence every 100 hrs and there is a critical update on 2004-2007 seadoos to the washers inside of the supercharger housing. The ceramic washers MUST be replaced immediately in them. You need to consult with the seller and see if this has been done and if you cannot trust them, you or somebody you trust should remove the supercharger and look at it.
Aside from the quirks of the supercharger It sure seems like that motor is very strong and reliable.
Those skis like to drink a fair share of fuel and both recommend 91+ octane fuel (premium).
What are you planning to do with them?
If ocean riding is in the plan, the seadoos have a closed loop cooling system which means that you do not have to worry about corrosion in the engine's cooling system.

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WATER: 2008 - sea-donkey RXT S/C STOCK
SNOW: 2012 - Arctic Cat XF High Country 800 2-smoker
LAND: 2005 Kawasaki Brute 750, 1997 Club Car, 2009 GMC Sierra 2500HD CCSB D/A SLT

kashworth

Just curious, do all seadoos have this system? And if so, how does it work? It doesn't constantly draw in water for the cooling? I was riding my 97 GSi and the wear ring was destroyed, so the ski would only go about 5 mph at full throttle, and it overheated very quickly.

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1999 Yamaha XL1200 LTD
1997 Sea Doo GSi

Ernest T

Disclaimer: Yamaha Guy

SeaDoos closed loop cooling works by circulating a the coolant (like antifreeze and water) through the engine via a pump then back to a heat exchange system located in the ride plate (sort of like in a car through the radiator). The system is closed and doesn't suck up the water you are riding in for cooling. This system depends on cool water running past the ride plate to exchange the heat in the system. What you experienced is one problem with this type of system = engine temperature is harder to regulate. When you ruined the wear ring, your engine was revving fast, but the ski was not moving, therefore the heat exchange in the ride plate was not able to cool the system. The result is overheating of the engine............sort of like a car overheating when setting in traffic on the freeway (not enough air blowing through the radiator to cool the system).

With an open loop cooling, the water you ride in acts as the coolant. Its pulled into the engine through a strainer that filters out debris, and then circulates it through the ski. This system is used on all other brands of skis, and all outboard boat engines.

Advantage of the closed loop system is that in the ocean you are not pulling salt water into the engine cooling passages.

Disadvantages of the closed loop system is that is adds an extra level of complexity to the ski............more components to fail (water pump for the system, etc.), engine temperatures are harder to regulate as you found out, and its something extra to have to maintain and add fluid to.

In lakes, etc. with modern skis that have good filters to keep debris out of an open cooling system, there is no advantage to the closed loop system. Many guys would tell you that there is no advantage in salt water either, since you can easily maintain the open system with a 5 minute fresh water flush after a salt water ride, plus you have a much less complicated cooling system.

OK, now the SeaDoo guys can tell you why I'm FOS.

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2008 Yamaha FX HO Cruiser
2010 Hurricane Sundeck 2100

kashworth

Thanks for the explanation, though i'm pretty sure my ride plate does not have a heat exchanger system in it since i took it off and its just a simple metal plate. I was thinking it overheated because there was no water being forced into the cooling system due to slow movement through the water? I'm just trying to learn the way watercraft work, i'm new to them. I'm an aircraft mechanic so i understand how systems can work, just dont know exactly how they do on different machines lol

__________________
1999 Yamaha XL1200 LTD
1997 Sea Doo GSi

kashworth

BTW, my father in law is the one that ruined it LOL

__________________
1999 Yamaha XL1200 LTD
1997 Sea Doo GSi

Ernest T

Yea I should have read you post more closely. I think the closed loop cooling is only on SeaDoos 4-Tec engines, which came after your ski.

I'd hit your father-in-law up for the repairs $$$.............good luck with that, if he is anything like my father-in-law.

__________________
2008 Yamaha FX HO Cruiser
2010 Hurricane Sundeck 2100