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new 1993 Sea-Doo SPX

S

SPXPS

New Member
Hello,

I picked up a 1993 Sea-Doo SPX yesterday for $300 including trailer.
My car has some problems and I was thinking about if I should risk the drive to pick up the Sea-Doo. The deal was so good and I really wanted the Sea-Doo, so I went to pick it up. That went well.
I bought a new battery for the Sea-Doo and it started right up. Pretty impressive for a 20 year old machine, it didn't even hesitate a second, kind of instant start after pressing the button.
The problem is that I don't have a water connection at my storage building and to move it to my house I need to fix my car first. Fixing the car will take a few weeks, so for right now I can start the Sea-Doo only for a few seconds.
I want to do some maintenance in the meantime and don't really know what's going on in the engine bay. I could do some reading and probably could figure it out on my own, but if you could kindly answer my questions, that would speed up the process.

thank you
 
Those are the vacuum bilge siphons. Basically a bilge pump.

Youa re going to need to get a rear flywheel cover, yours is missing.

No reason to start it on the hose unless you are flushing the cooling system.
 
The water coming out the jet pump makes a low pressure that pulls the water out of the hull.

There is no reason to run the ski on the hose other than to flush the cooling system of salt and debris. Only reason to run the ski out of the water is to make sure it runs. With no load you will have no clue how well it runs and nothing to gain. You can also overheat the driveshaft bearings and pump bearings with the ski out of the water.

Never ever have the hose on with the engine off, you will force water through the exhaust into the engine without the exhaust pulses keeping it out.

Running for a few seconds (10-30) out of the water will not hurt anything.
 
thanks
I am moving on to my next question.
IMG_3700.jpeg

IMG_3702.jpeg

I noticed a disconnected hose (blue) and a broken off connector (green). I suspect they belong together. If that is the case, I am interested in suggestions how to fix that.

and:
What is that black box that the connector (green) sits in? This box is at the rear of the engind bay.
 
That is the battery vent tube if you are using a flooded lead acid battery. Hydrogen gas is explosive so it vents to the black box that is an air vent to the outside. Just get a new barbed plastic elbow or switch to a maintenance free battery.
 
Oh, that s so great, with an AGM battery I can just get rid of that hose then.

The gas level gauge doesn't seem to work, is it supposed to show a reading shortly after engine start?
The tank appears to be full and the gauge shows empty.
 
Congrats on the new ski, your in the best of hands with Mikidymac but I just wanted to follow along to see you get it up and running
 
thanks, I will head out later to the Sea-Doo to check that
Last night was the first night when temperatures got so low that water outside started to freeze on the surface.
Days usually stay above freezing point, nights sometimes go down to 20 °F where I live. Is it advisable to fill the cooling system with antifreeze or is it sufficient to check the engine drain hose for not being blocked and run the engine for a few seconds to shoot out remaining water?
 
The cooling system is open. And when running in a body of water, the pump has a side tap on the pressure area that circulates the lake water through the engine and exhaust for cooling, the water exits through the exhaust, air bleed for the exhaust, and air bleed for the head. You can raise the front of the trailer up and rev it up a couple of times to evacuate more of the water out.
Betweem the pump and the steering nozzle will be the venturi, where a vacuum is created (just like in a carburetor) when riding the ski. There's a couple of hoses tapped into this venturi area that serve as a bilge pump, if you're still wondering how it works.
 
It's moving slow with my Sea-Doo, work takes most of my time and energy.
IMG_4073.jpeg
I gave the "bilge pumps" a good cleaning. Now I understand how they work... It's just a vacuum pickup.

I want to pull the gas and the oil tank. I want to order an oil filter, is it advisable to get a certain brand of them or will basically any cheap one do?
SEA DOO 2 STROKE IN LINE OIL FILTER 275000051 275000262 275-000-051 275-000-262 | eBay
I wanted to order that one.
 
This site contains eBay affiliate links for which Sea-Doo Forum may be compensated.
SPXPS said:
It's moving slow with my Sea-Doo, work takes most of my time and energy.
View attachment 67098
I gave the "bilge pumps" a good cleaning. Now I understand how they work... It's just a vacuum pickup.

I want to pull the gas and the oil tank. I want to order an oil filter, is it advisable to get a certain brand of them or will basically any cheap one do?
SEA DOO 2 STROKE IN LINE OIL FILTER 275000051 275000262 275-000-051 275-000-262 | eBay
I wanted to order that one.
Click to expand...
Order from Seadoo warehouse or OSD marine to avoid the ones with the paper filter that you may find on eBay and Amazon
 
This site contains eBay affiliate links for which Sea-Doo Forum may be compensated.
IMG_4162.jpeg
I am working on removing the gas tank. That's liquid I pumped out of the tank. It looks like the gas is mixed with oil. Is it possible the oil somehow contaminated the gas? Or is it more likely the former owner didn't know what was going on and mixed the gas with oil?
 
IMG_4167.jpeg
The oil tank has three connections on the top.
1) What connection is that? The hose seems to connect to the engine somewhere in the exhaust manifold area.
2) What is that? a breather?
3) filler hose/filler neck
IMG_4168.jpeg
The bottom has two connections.
4) Is that the oil feed to the pump? The hose carries the oil level sensor and connects to the filter.
5) What connection is that? The hose seems to connect to the engine somewhere in the intake manifold area.
 
If you haven't already, get the parts manual for your ski, free online. It gives pictures of where things go and connections, it will answer most of your questions too
The gas looks like something that has set for a long time or they added a red oil to it., I wouldn't use it in your ski. The blue oil looks right, a lot of our 2 stroke oils are blue. I would clean your oil tank, get whatever compatible oil you are going to use and use that. Try not to mix oils either they can react with each other, especially different brands. The other liquids, yeah you never know what things will look like after sitting. Just discard it all and start fresh. IMO
As for the part IDs , I can tell you some of it. My ski is a little different.
#1 looks like a mounting bushing to keep the container sturdy , not 100% on that one
#2 is a relief valve so the tank doesn't get a vacuum as it it draining, check that it works ( lets air in) and you are good.
#3 is fill port.
#4 I think that is a drain plug, not 100% on that one.
#5 is the hose connection to your oil pump on engine.
 
Blue oil is typically the wrong oil for your ski (TCW-2) these skis require API-TC oil.

1. Is the return/vent from the crankcase rotary valve chamber under the exhaust manifold.
2. Is a check valve to let air in but keep oil from leaking out. Nothing connects to the barb.
3. Is the fill hose.
4. Goes to the oil pump on the intake manifold.
5. Goes to the rotary valve cavity under the intake manifold.

Magnet is from the fuel gauge float.

Don't boost/jump start because you can fry the electronics.

Here are the older parts diagrams.. OEM Parts Finder
 
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