It's on the top and side of the battery. Looking down, you will not see the actual nippe. It will just look like a part of the battery extends out to the side about a 1/2" or so, and is about a 1/2 or so wide.
I bet that line reaches to the battery.

 

Nope but I don't recall a nipple on the battery to connect the hose to. Is it on the actual battery, or in the tray?

 

Is there a vent line hooked to the battery ? Those are explosive gases that need to exit the engine compartment. It will go to the same big white tube as the tank vent.

 

Any idea where this last hose goes? It comes from the big white vent tube.

 

Yep, that's the tank vent. The arrow should be pointing to the tank. I don't remember exactly how they did it with that ski, but it should hook to the water separator, then out of the ski. Back in the dark underworld back there. Might have to be a contortionist to find and get to it.

 

Okay I got all the rest hooked up except this one: it's coming from the vent tube. I'm
Not sure where it goes as I don't remember seeing this one disconnected anywhere. I thought it attached to the motor but there's already one in its spot.

 

The end that say tank, goes on the tank side of that vent line. You should have two smaller nipples on the tank end, facing the engine (not the two main nipples on top). One of those is for the return line, and the other is the tank vent (should be the one . The blue line with the check valve with the label "tank" with arrow goes to that, and the arrow points to the tank. It is not a fuel supply line. If you were to hook that up with the label "tank" facing away from the fuel tank, it would allow fuel to spill out in a roll over.
Scroll down some in this post I found. Has a view of the tank and lines.

http://www.pwcforum.com/vintage-jetski/10336-1993-waveblaster-1989-wavejammer-project.html

 

Here is a picture of the hoses. The bright blue hose is the one I was referring to with the check valve on it.

 

I can't see the actual petcock to tell you. I just know that there are four houses coming from the petcock location. Two are the large hoses going directly to the fuel tank, one is a black hose with blue stripe and one is the blue hose with the check valve.

I know the ventilation hose you are referring to, it's on the right side of the hull, behind the engine. I just don't recall the blue hose with the check valve on it being anywhere near it (as I said from what I can tell the blue hose comes from the back with the rest of the hoses).

What I'm confused about with that one is the check valve says tank, with a directional arrow. I'm to understand one end stays disconnected the other end goes to one of the tanks nipples. There is only one end that's not connected from what I can see, it's it's the one that would connect to the tank (the disconnected end had the arrow pointing towards it)

 

Do you have 2 or 3 nipples on the petcock ?

 

The tank has a vent line to allow air in as fuel is used. It has a one way check valve on it, so fuel cannot get out, in case of a rollover.
Yes, the pulse line goes to the engine. It is a vacuum that pulses the fuel pump.
You should have a vent line going into, and out of the water separator. This prevents water from getting into the tank, via the vent, in case of a roll over. This line will have a check valve on it, and is most likely the blue line you are seeing. Find the water separator, and see if there is a line going from it to the venting system on the hull.

Yamaha WaveRunner Parts 1989 WJ500F VENTILATION Diagram

 

There is a check valve coming from the blue (not clear) hose that's in the bundle of hoses coming from the petcock. There is a 'tank' label on the check valve. This is connected to one nipple on the tank. There is also a black hose with blue stripe in that bundle that we have hooked into the fuel filter and then into the carb on the pump side.

What is the 'pulse hose'? Is that the larger one that plugs into the back of the engine? We have that one in place, too.

We still have one extra hose though.

I am not sure what you meant by venting off the hose should one not be hooked up?

 

Is this the blue line you are talking about ?

89 1989 Yamaha 500 WJ Wave Jammer jetski Jet Ski Fuel Pump Filter Petcock Hose | eBay

 

Here's what you should have.
On and reserve from the tank to the valve.
Out from the valve to the fuel in on the fuel pump. (this is the one that has a screw in the center of the cover).
Return from the carb to the tank.
Pulse line from the engine.
Vent off the tank with a check valve.
You should have three locations on the petcock. On, res, and to carb. On and reserve pull from their own locations on the tank.
Some systems used a restrictor in the return line to limit the amount of fuel returning to the tank, so the engine would not get starved (kind of like a pressure regulator), but I'm not seeing it anywhere on yours.
If it is a clear blue line, that is most likely some after market fuel line. it probably feels very rubbery.

Yamaha WaveRunner Parts 1989 WJ500F FUEL TANK Diagram

 

Reserve and on are hooked up. There is a blue hose from the petcock with a check valve on it. That's hooked into the left valve on the tank. The other hose from that goes into the filter then into the left side of the carb opposite the fuel pump. There's a line left over from the fuel pump side of the carb that isn't hooked up anywhere.

 

Tell me what you have hooked up.

 

It appears I'm having trouble getting the fuel lines hooked up correctly. After hooking up all lines to valves there is still one line left over. I've been trying to find a diagram but all I can find is one that shows where hoses connect to the tank, not the carb and air intake. Could somebody please help me?

 

No worries. I appreciate the help. Found an owners manual online that says to just use straight 50:1 mix, so once I get it back together hopefully I can fire her up and go.

 

I may have to stand corrected for this ski. To many out there to keep my old brain straight. Sorry. The 89 does not appear to use a injection system. There would be a oil tank under the cowling. From what I have, Yamaha started using the oil injection system on the 650 Wave runner (wra650).

 

Wait I'm confused. If you aren't supposed to premix where do you put the oil? Obviously from time to time oil needs to be refilled, usually with a 2 cycle you use the gas tank to do it. This one doesn't?

 

Yes it is a 2 stroke engine. 2 strokes do not have oil in the crank case. All the oil they get is from the oil/fuel mixture. pwc's came from the factory with a oil injection system that is very reliable. If you are going to premix, then you need to get a block off plate, cap all the injection ports, and remove the oil tank. Mix is 50:1. If there is any sign that a seal is leaking oil, chances are very good that seal is bad, and causing a air leak, which WILL create a lean condition, and seize the engine. This is what a pressure check verifies. If this is the case, you need to replace the seals before use.
That info is in my head.
Look around ebay for a service manual.

 

Also, I noticed oil around the seal where the mid shaft connects in the back, so I'm assuming there are oil chambers in it somewhere, but I couldn't find an oil pan or oil filler so I'm assuming it's a 2 cycle. If that's the case do I need to fill the case with oil ahead of time since the back cover was off as well as the intake and exhaust manifolds, and the front cover and balancer, or is premixing the gas enough?

 

Where can I find that information? I've scoured the net looking for info on this pwc and have come up short nearly every time. I'm struggling now to reassemble the external parts inside the craft because I can't find component locations.

 

145-150 are good numbers, but they need to be within 5-10 psi of each other. I would do a pressure check. if the seals are bad, you won't make it through the season. If all checks out, then I would just reseal it in the off season. Replace the oil injection, and fuel lines, and read up on how to prime the oil injection system before starting the engine.

 

So...

sorry for the delay in posting. Been really busy.

It appears that the motor was in fact seized up. I took it out and tore it down, and the crank itself and the bearings in the crank are locked up. I was going to unsieze and rebuild, but I found a local eBay store that has a used one for sale. The problem he said with it, is it has a compression of 145 pounds. I am not sure what the typical compression of this engine is, but he said that it is rideable and useable in it's current state, and for only $150 bucks I think it's a steal to get it, drop it in and ride it this season, and when I garage it for the winter pull the head off and replace the gasket. I still have the parts from the other motor in the case the cylinder head is cracked or something.

What do you guys suggest?