2000 Gtx Di

[ron castle]

Need a little advise on continuious use of my Sea Doo's on the lower Colorado River where the water is heavly charged with sand and silt. My Doo's each have 200 hours of use on the River and I am concerned that the engine block may have captured enough sand to effect the cooling system. My question is how do you flush the block to eliminate any sand or foreign matter that may be trapped or is the block design such that no sand is left behind to cause a heating problem?

Thank in advance
Ron

 

[seadoosnipe]

Welcome....

Hello Ron and welcome.

Under normal conditions, you should have a clear water jacket in the block. The engineers that designed this system, designed it to flow from the bottom up. So, your constantly pushing small particles up and out.

Water enters your engine through the exhaust manifold at the bottom most part of the cylinder. It's forced in by the pressure of the pump, circulates around the water jacket and up to the top of the head and out. This flow is to inhibit sediment from settling in the lower end of the cylinders. But, just recently, I was rebuilding a 650cc that I found with a crack in the casing. I pulled the head, to find it 3/4's full of sand, on the outboard side of the water inlet.
The water coming into the cylinder comes in on the starboard side adn circulates around the back side of the water jacket and up. Here, is where sediment may fall to the bottom.

Unless you've rode a lot on the beach, up close, within a foot or so, continously, then you may have a little cause to worry. But, it's not something to get over concerned with. Although, you can crack the cylinders water jacket without actually setting of your over heat alarm, I think it's unlikely. This motor I was working on was a 1991. There is no telling how long it had been before it has had any kind of work.

Flushing is the key. Make sure you always flush after coming in.:cheers: