I guess his reasoning is the closed loop system is rubberized so it won’t freeze and break but I’d imagine if it gets cold enough and there is water in the exhaust or even in the water box it would be risky. Idk I want an explanation too

Just found this in a forum Closed-loop cooling system (Sea-Doo ONLY) works much the same as an open loop system but instead of having water flow into the engine to cool it, antifreeze is used instead. The antifreeze is circulated through the engine than to a ride plate. The ride plate is just a heat exchanger or a radiator that converts the hot antifreeze into cool antifreeze. The way the ride plate works is that it allows the antifreeze to circle around in the plate. While circling around, the antifreeze is being cooled by colder water touching the ride plate. The heat transfers from the antifreeze to the ride plate and is carried off to the water. Colder antifreeze is pumped back to the engine to cool it. Now you might be thinking how reliable is this closed loop cooling system? It’s so reliable that all modern cars, planes, and even trains use it! Yes, the car you drive into work uses the exact same system as a Sea-Doo watercraft use. So if your car uses it why wouldn’t your jet ski? On top of all that since it’s a closed system, you won’t take in any corrosive water. Since you don’t have anything eating away at the engine block of a Sea-Doo you could have the engine last much longer. Also since you don’t have water near the engine winterizing is even easier. No need to flush the engine on a Sea-Doo since it is completely sealed up. But there is one drawback! The engine is completely sealed up but the exhaust and intercooler are still cooled by water and they will need to be flushed out for winter.

@@BurtonBrah that makes so basically flush out the intercooler and the exhaust prior to winter and it should be fine. What about antifreeze would I be able to put that in the intercooler and the exhaust and let it sit in there and it still protected I'm talking about RV Marine antifreeze

@@williamb9602 honestly not sure.

@@BurtonBrah 10-4

I just got done riding mine this weekend for the 4th and I got it to about 52 MPH