00 STX 1100 DI Overheat problem

[Kawiskis]

Blew the tube between the Exhaust and Muffler, parts guy told me there wasn't enough water flowing in the tube. Is there a way to get more water to cool exhaust? Heard of boring out water pickup, is this possible? Also read about by-passing out line from EMM cooling. Would this lead to hotter exhaust due to fact less water getting to exhaust? Also is EMM & Ref. Fuel injection same thing as shown on Cooling page of Kawasaki.com Electronic Parts Catalog?

Thanks
Brother from another Mother

[SX-R800]

Re: 00 STX 1100 DI Overheat problem

My tube did that on my D.I.. The problem was, the EMM was bad. The EMM was not puting the right amont of fuel so the engin was leaning out.... Thats what was wrong with my D.I.Good Luck

[Glen]

Re: 00 STX 1100 DI Overheat problem

Here's something you can try. This is a repost from an article published by Megaflow in RJS.

You can do this, if you are positive you don't have sometype of blockage in the cooling system.

"If you notice on your DI the exhaust pipe does not line up exactly with the waterbox. Most of the time the water box is lower than the pipe.

What happens is that DI owners like to start the engine out of the water like
on the trailer of stand. What happens then is the hot exhaust is directed at
the top of the rubber exhaust hose. Most of the time the hose burns though at the top of the hose between the water box and the pipe.

How you can fix this from happening again is two fold. First unlike other skis
DI's dont need to be started on the trailer to warm them up. Since they are
fuel injected they can start in the water just fine. The fuel/ignition map is
programmed to take into consideration cold starting and uses 3 sensors to
determine this. So wait till your in the water to start it up.

Second and actually the real fix is to install a steel or stainless steel tube
inside the hose from the pipe to the waterbox. The pipe needs to be 2.75"
diameter and 60mm's long. It is a little tough to install the hose once the
stainless tube is in place but if you loosen up the waterbox outlet hose and
undo the waterbox strap you can do it. I use soapy water to make it fit. The
2.75" tube fits perfect in a new coupler hose. I use OEM hoses.
Stainless work great but sometimes hard to find. You can use steel tube because of all the soot from the exhaust and injector oil tends to coat the tube and it doesnt rust.

The steel tube takes the direct heat from the pipe and you shouldn't ever have that burned hose problem again."

[DaveG]

Re: 00 STX 1100 DI Overheat problem

For what it's worth....

I have a '98 1100 STX, carbed version.
I burnt out the same exhaust hose a few weeks ago. When I talked to a mechanic I trust he said that the most common cause of this is shi$$ caught in the small 90 deg fittings that feed the exhaust pipe. I removed the fitting that goes directly into the pipe, cleaned it and it ran great after that.
Last week I noticed that there was a very weak flow from the pisser. It never tripped the over heat alarm, ran bad or anyother symptom, just a very weak flow. Flushed and back flushed several times and could not get good flow. Checked the small fitting on the front of the motor and found it partially clogged.
All I'm saying is before you get too elaborate with your troubleshooting, cheack the basics.
Dave

[jerry369]

Re: 00 STX 1100 DI Overheat problem

Dave, I think you may have hit on one of my problems. I have noticed verry low flow out of the bypass out of the hull side. And performance is down I had just instaled a new SBTp block and I thought thay I may have crossed cooling lines. In the morning I will be looking in to clogs in the lines. I can only get my ski up to 50mph and it skips under a load or choppy water also.