water spray jet pipes

[wp8800]

Me once more....

On the rear of the GSX ltd (1999) are both holes supposed to spray water (the ones by the tow eye)?

Its just that 1 of the pipes on mine is not connected inside the hull. I cant find anywhere for it to go. The place according to the manual has another pipe on it, and that heads up towards the left hand side front. is this a modification?

The other pipe is connected and sprays water fine

 

[SabrToothSqrl]

it should shoot out 2 streams of water. look for the factory cooling diagram to show you how.

there are 2 outlets for the Cooling System Inidicator.

one is near the carbs on top of the pipe.

one is lower down the pipe.

there are 3 small nipples total. 2 outs, and one in from the rear water regulator on the pipe.

 

[racerxxx]

A pic is worth as thousand words

 

[Sportster-2001-951C-Stock]

The main purpose of those is to allow trapped air to escape from the exhaust manifold water jacket so that cooling water can reach the hot surfaces. If one of them is plugged and the air can't escape, then there could be a localized cooling issue.

So try to make sure both of them are clear of restrictions, and working. A small amount of water coming from them indicates all is well, mine barely flow at idle speed.

 

[SabrToothSqrl]

correct. at cruising speed, there should be some 'significant' flow. at idle it will either be none or a dribble.

 

[Sportster-2001-951C-Stock]

correct. at cruising speed, there should be some 'significant' flow. at idle it will either be none or a dribble.

Yes, as long as the air can escape and is displaced by cooling water, the volume is unimportant but can lack if the supply pressure from the jet pump is low for some reason. In that case, hopefully the engine overheat sensor is working correctly.

I would estimate that my 951's "tell-tale" probably flows around a gallon or possibly two, of water per minute at planing speeds. I've considered separating them so I can monitor them independently, but haven't yet.

As a rule of thumb concerning marine engine cooling systems in general, you should be able to lay your hand anywhere on the engine block or exhaust without burning your skin. Incidental contact should not burn you.

 

[dustindu4]

Here's a better diagram of the cooling system on the 951. As said before there are 2 locations it comes from, thus the dual holes. This diagram for whatever reason shows 1 hole in the stern and the other out the side.

 

[Sportster-2001-951C-Stock]

Here's a better diagram of the cooling system on the 951. As said before there are 2 locations it comes from, thus the dual holes. This diagram for whatever reason shows 1 hole in the stern and the other out the side.

View attachment 21912

Yes, but that drawing is very confusing b/c it doesn't show the main cooling water outlet at the bottom of the exhaust manifold. If one were looking at this drawing you posted for the first time, he would think all of the cooling water is being expelled through those two tiny tell-tale hoses, and that's not how the majority of waste heat is expelled. The majority volume of the heat is expelled in the water exiting the exhaust manifold from the bottom barb fitting.

Edit: I take that back, they do show it. But, just a few more words of description would've been more helpful, IMO.

Then there's the early 951, which flows the water in reverse direction...... Another point of confusion.

 

[SabrToothSqrl]

and the water outlet from the bottom of the engine block

and the water that exits from the exhaust outlet!

and the

and the

and the!

 

[Sportster-2001-951C-Stock]

and the water outlet from the bottom of the engine block

Speaking of that one, isn't there still a little left sitting around the top casing, or does all of it actually run out that block drain?

 

[SabrToothSqrl]

There is only 1 entry point. With multiple exists. The largest is the bottom of the pipe, which is fed via the exhaust manifold from the block.

 

[wp8800]

Here's a better diagram of the cooling system on the 951. As said before there are 2 locations it comes from, thus the dual holes. This diagram for whatever reason shows 1 hole in the stern and the other out the side.

View attachment 21912

doesnt this diagram show that there is one tell tale at the rear and and at the portside near the front?

 

[Sportster-2001-951C-Stock]

doesnt this diagram show that there is one tell tale at the rear and and at the portside near the front?

That's correct. Those both carry water overboard, from the tuned pipe water jacket.

 

[SabrToothSqrl]

That's correct. Those both carry water overboard, from the tuned pipe water jacket.

That's an old diagram then. The XP is a single port side CSI, it combines the two into one, at least on my 02.
The 99 GSX has 2 CSIs out the back, as does the 99,00, and 02 GTX.

The rest of the diagram, however, is valid. Looks like they moved the exit point is all.

And when you run it on a hose... It's all backwards!