Stock engine water routing

[g.b.]

Hello!

I'm presently hooking everything back up on my superjet project which will use the stock exhaust system for now.
I can't find any reliable info on the correct way to hook up the water hoses.
I manage to find some sketchy and un-trustable drawings online and in the shop manual, nothing is very clear neither on that topic.

I'd like to know if there are some clear thrustworthy diagram somewhere that I couldn'T find.

thanks!

g.b.

 

[Mike W]

1- to head
2- in from pump

 

[g.b.]

There should be a pisser hooked up somewhere

 

[e46erak]

Run a T in line #1 to a pisser if you want to use it. It's totally OK to have everything exit through the exhaust if you're stock.

 

[e46erak]

 

[Mike W]

Right, just install a T in the line going into the back of the head to dry out the exhaust just a bit for a little more performance. But it’s not needed.

 

[g.b.]

OH right! great thanks! with the drawing, always better, appreciate you taking the time drawing this!
I'm wondering, what are the pro's and con's of using the pisser, yamaha used it from factory on my model year but previous models didn't.
From what I can see, water coming out the pisser would only made a quick pass in the exhaust manifold so the water from the pisser shouldn't even be very hot?
Not sure I understand what you mean by ''drying the exhaust'', the water going to the exhaust seems full flow if the added T goes after the pipe, between pipe and head ?

This cooling system seems odd to me ?!

 

[e46erak]

Water flows into the exhaust manifold, then up through the water jackets in the engine, out the head (this is the line you T from) and into the pipe. So it does get quite warm actually.

When you T off of this line, you are splitting the flow of cooling water between the exhaust and the pisser, where normally all the water goes to the exhaust. This results in a different air volume in the exhaust chamber, and increased temperature. Not totally sure of the performance impact.

Most people run pissers so you can have visual confirmation that cooling water is flowing through the engine. If the flow stops, you know the lines are clogged and you should shut off your engine before overheating.

 

[g.b.]

Thanks for the clarification, I tought water coming inside the pipe by the bottom nipple immediatly came out the second nipple toward the head, then beeing T'ed to the pisser. I wrongly tought that the nipple at the back of the head was actually an INLET TO the head instead of a OUTLET to the pipe.

So, the 2 nipples on the pipe aren't actually connected!

thanks again

 

[e46erak]

Does your ski have a flush kit installed?

 

[g.b.]

Yes, the flush kit was installed at the top of the exhaust pipe where there is a plug from factory. seems right?

 

[e46erak]

Yep that's correct!

 

[g.b.]

Thanks!