2003 Stx1100di EMM coolant bypass

[graphicideas1]

I have a 03 STX and the EMM coolant line at the stator gets clogged often. Has anyone "T"ed off the feed line from the pump and go straight to the emm? Would this work?

[steve45]

How about installing a strainer in the cooling water inlet hose? A Groco WSB-500 works well.

[GlenT]

I incorporated an independent cooling line for my EMM a few years back. Here is a diagram someone else posted on PWCtoday, which is exactly how I did mine. As Steve said, this will not solve your problem of clogged cooling fittings. You should have a filter log on top of your jet pump to screen larger debris. Do you ride in salt water? If so, do you flush the cooling system after every ride? That's a good filter he recommended for the fine particles.

[SIMPLEARKANSAN]

GlenT Can you tell me what size fitting the Tee is and a possible source to purchase? Thanks

[GlenT]

The hose ID is 6 mm. I used a 1/4 inch brass barb'd tee. I purchased it on Amazon for $5 or 6 bucks (Interstate Pnematics FBT44). You may also need a brass 3/8 inch to 1/4 inch reducer (for the EMM exit hose) depending on what size thru hull fitting your using. I used an aftermarket one, which has a 3/8 inch nipple.

[SIMPLEARKANSAN]

Thanks. That is exactly the info I was needing.

[tjoiner1986]

Pardon me while I revive a 5-year old thread but I just received Riva Racing's filter kit in the mail today to do this mod. Their kit includes the WSB-750, not the 500 -- same principle but larger filter -- along with mounting bracket and an assortment of 3/4" fittings with different sizes of straight and right angle barb. I've already got 10' of 1/2" braided clear PVC hose, a 1/2" brass T, and a 2nd OEM pisser which I've already begun installing on the port side (opposite the factory pisser on the starboard side).

Anyway, my understanding of the diagram up above is that I tee off the cooling line TO the stator, connect that to the EMM, have the line FROM the stator go into where the output from the EMM is currently going, and then reroute the output from the EMM to its dedicated pisser (is that really the technical term for it?).

Should I install the filter BEFORE the T so that it filters out everything entering the ski or should it be installed AFTER the T so it only filters out the cooling water going to the EMM?

[steve45]

Filter ALL of it. That strainer will pass enough to cool the engine even if it's full of sand.

[tjoiner1986]

Filter ALL of it. That strainer will pass enough to cool the engine even if it's full of sand.

Just gotta figure out an easy way to get to that hose. The exhaust is in the way.

[tjoiner1986]

How about installing a strainer in the cooling water inlet hose? A Groco WSB-500 works well.

I'm learning here. Is the main inlet hose the one connected to the jet pump in this diagram below? I'm wanting to install this Groco strainer but want to make sure I'm tapping into the correct line.

[steve45]

Yes, sir!

By the way, when I install one of those strainers, I attach the inlet hose to the tube that goes to the INSIDE of the screen. If you have it to to the outside of the screen, it can crush the screen and trash can get past it. Makes it a little harder to see trash inside it, but just take the cover off and you can see it. I carry a strap wrench to make it easier to remove the cover if it gets tight. (Hand tight with some waterproof grease on the gasket and threads seems to work fine).