Completely Flush a 787 cooling system

[patman25]

Is there a way to completely flush a 787 cooling system while it's together?

I am currently rebuilding the top end on one of my 1996 Seadoo GTX's. After pulling the jugs off I noticed a ton of sand in the water jacket. I flush these after every use in the salt water. It seems like a filter or something is missing somewhere. But anyway, I'm paranoid that my other ski is having the same issue but I'd rather not tear the engine down just to clean this out.

Anyone have any suggestions?

Thanks.

 

[seadoosnipe]

Normal...

Is there a way to completely flush a 787 cooling system while it's together?

I am currently rebuilding the top end on one of my 1996 Seadoo GTX's. After pulling the jugs off I noticed a ton of sand in the water jacket. I flush these after every use in the salt water. It seems like a filter or something is missing somewhere. But anyway, I'm paranoid that my other ski is having the same issue but I'd rather not tear the engine down just to clean this out.

Anyone have any suggestions?

Thanks.

In a slight way, this is normal. I have pulled jugs to find the same thing. At the bottom of the jugs, you have a calibrated fitting that drains all the water from your jugs when you pull it from the water, hence the term, total loss cooling system.

If you ride close to the beach or in the surf where sand is suspended in the wash of the wave, you will pick this sand up and it will build in your jugs since the particles are too large to drain through the calibrated fitting.

In these riding conditions, it's probably a good idea to pull your heads once ever couple years and manually clean it out. When you do, make sure that water drain connection on the bottom of the jug is clear. There is a "t" that crosses to both jugs, then runs through a normally clear line to the back of the exhaust system. Left in this condition, it will eventually cause insulation and you will loose your cooling efficiently and possibly overheat.

If you are in a really sandy environment, you could install a see through filter in the back of the motor, just ahead of the jet pumps engine cooling water inlet. But, it would have to be a low resistance type and checked/cleaned often.......:cheers:

 

[patman25]

Thanks for the answer! Sucks that I have to pull the other jugs off, but it's really only an afternoon project.

I do tend to ride in sandy conditions quite often, so I will certainly look into a low resistance filter to put on the input line.

Patman

 

[voodoo]

Thanks for the answer! Sucks that I have to pull the other jugs off, but it's really only an afternoon project.

I do tend to ride in sandy conditions quite often, so I will certainly look into a low resistance filter to put on the input line.

Patman

I do not think you need to pull the jugs, only the head/s and with a vacuum extender draw out the swarf, pour a cup of water to verify the drainage and maybe force backwards with an air line, vacuum again and put the head/s back and water test for a leak, viola...