650/X-2 1987 650SX - Not pissing good - Help

[ryanerb]

It's barely pissing, and the water it's pissing is super hot. It is almost like just little spurts of water, never a good constant stream. At times there is nothing coming out, just 'steam' or whatever. I know this is totally bad, and stopped riding until I can figure this out. I spent last weekend trying to blow out most of the cooling lines on the motor, but took the ski out today and that didn't seem to help. OH YA, and it pisses GREAT when I run it off the hose at the house (T in the line between the head and the pipe?)

I am very curious the whole 'flow' of this water through the system. Obviously starts at the pump, gets sucked up, and somehow cools the head and the pipe, and then gets ejected down the pipe (some out the pisser).

Any ideas? Could some of the cooling ports in the head actually be clogged? Someone said something about the screws in the headpipe?

I got this ski used, for 100 bucks, it has a west coast head, and I think an aftermarket pipe, I'm not sure.

Any ideas, help would be great, I can provide more info, just ask. I can provide pics too if needed!

Thanks guys!

 

[blown]

Sounds like it could be a bad head gasket it... i had the same problem on a 650sx and water was getting in the cylinder from one of the water jackets in the head.... most likely your problem

 

[ryanerb]

Sounds like it could be a bad head gasket it... i had the same problem on a 650sx and water was getting in the cylinder from one of the water jackets in the head.... most likely your problem

ya, there is a very good chance that is the problem... i did a compression test, seemed fine though, but the ski is so old and crappy, it might be a good idea to just replace it anyways. if the head gasket is blown but only towards the cooling jackets and not towards the outside, will the compression be the same, or will the compression be lower no matter where its ripped?

 

[dbattersby20]

I recently took apart a ski that hadn't been run in 8 or 9 years, and I guess the guy didn't flush it out and the salt and sand formed a cement in some of the cooling ports.... just an idea. I was able to chip most of it out after a while.

 

[ryanerb]

I recently took apart a ski that hadn't been run in 8 or 9 years, and I guess the guy didn't flush it out and the salt and sand formed a cement in some of the cooling ports.... just an idea. I was able to chip most of it out after a while.

could very well be the case, i think i could learn a LOT from taking apart this ski and rebuilding the motor.
if i pull off the head, is it going to be a stock head gasket, or a west coast gasket? i dont want to pull the head if getting a new gasket is going to be a huge pain

 

[blown]

You can get top end gasket kits for those from ebay for $30.... What is your compression numbers? I would seriously pull the head and check, Its only an hour job...

Is it pissing water on idle or only when your ripping on it? could use a little more detail....

 

[ryanerb]

You can get top end gasket kits for those from ebay for $30.... What is your compression numbers? I would seriously pull the head and check, Its only an hour job...

Is it pissing water on idle or only when your ripping on it? could use a little more detail....

i would love to provide any more detail, please just let me know.

definitely seems to piss a little more when i am on the throttle movin. and even then its like its sputtering water.
idling doesn't seem to really let much out.

i'm pretty sure on jetskis there is no 'impeller' to bring the water in, its purely through suction at the pump correct?
i'm wondering if i hook it up to the hose through the rear water inlet rather than backflushing it if i can trace the issue better. i have a hose tap on that one cooling line, but like i said, that must bypass the clog since it pisses fine hooked to the hose on that tap.

it seems there are two cooling lines going to the rear. I see 3 lines through the back firewall. one is for the bilge, but 2 appear to be cooling, is this correct?

would pictures help out at all?

 

[suva]

+1 on the head gasket, I had a ski with the same symptoms, it still had fairly even compression and ran pretty good, even in salt water.

 

[ryanerb]

+1 on the head gasket, I had a ski with the same symptoms, it still had fairly even compression and ran pretty good, even in salt water.

good tips.

anyone with a picture of the top of a 650 head with the gasket, just so i can see the cooling ports , etc in a picture?

i think if the gasket is blown on the cooling port side but not on the outside to the engine compartment, we are getting what suva explained.

 

[ryanerb]

Alright, so I guess I lied. When I went to blow out the cooling hoses, like i said there appears to be 2. one straight to the pipe, and one to the head. The one to the head is a bit of a pain to get to, so I just did the pipe one. My next task is to try to get the line to the head pulled off. This could be my problem.

 

[ryanerb]

I got some more shots of the cooling lines.
The first picture is the right side of the pump, and the hose you see is for the built in bilge. HOWEVER, there is a port above the bilge line, and its not hooked up to anything?!! Do I have a missing line or is this how it should be? I blew some air into it, and I'm pretty sure this line hooks up to the pipe.

This second picture is to the left of the pump. This line I'm pretty sure hooks into the head. I don't know if I can access this line without pulling off the ride plate, what do you guys think?

 

[hollowpoint]

I couldn't figure out what that extra fitting was either when I got my 650sx, seems like I found a diagram and it had it listed as a drain line or drain tube. Not realy sure what for though, I'll see if i can find the diagram again.

 

[hollowpoint]

Here it is, its a drain used to let out excess water from either the waterbox or the exhaust chamber (I cant remember off hand), from what I have read some people use it for dual cooling.
http://ww2.justanswer.com/uploads/motoforge/2010-08-16_171724_JS650SX.jpg

 

[Wilke]

Sounds like your lines are piped wrong. Does the one from the bottom of the exhaust manifold (pictured) go to the head? If it does thats wrong.

 

[ryanerb]

Here it is, its a drain used to let out excess water from either the waterbox or the exhaust chamber (I cant remember off hand), from what I have read some people use it for dual cooling.
http://ww2.justanswer.com/uploads/motoforge/2010-08-16_171724_JS650SX.jpg

what an awesome diagram!!! thank you!

i don't think my lines are wrong, the one from the pipe goes to the drain... and that one from the head goes back to the firewall to obviously the pickup (that one in the picture one post above this)

so now its looking like 90% sure its in the cooling ports of the motor, cause i have clearly blown out the hose to the rear of the pump and when i hook up to the hose between the pipe and the head, it pisses fine, so that means its in between the tube and the head/exhuast hose, so that leaves the head might be time to pull the head off and just see what I got, i'll just have to order another gasket.