Coolant replacement for 2004-2006 4-tec RXP & RXT.

[AircraftDoc]

What is the coolant capacity? And what is a good antifreeze? Mixing with distilled water.. Antifreeze that is anti corrosion for aluminum engines??
No SeaDoo dealer for 100 miles.

2005 Rotax engine shop manual has: Ethylene Glycol mixed 50/50 distilled water.

 

[KK40384]

2005 Rotax engine shop manual has: Ethylene Glycol mixed 50/50 distilled water.

Ding ding! As far as capacity I'm not sure. After draining the system fill it back up then remove the drain plug and make sure you get an even flow with no air bubbles. When you have that top off the tank and you're good to go.

 

[devonte007]

Any quality name brand antifreeze that you would use for your car/truck would work fine. Most automobile engines these days are aluminum so anything along those lines would be good, if you're unsure read the labels as most state that they are safe for aluminum blocks.

For capacity, I typically purchase 1 gallon of undiluted antifreeze (makes 2 gallons mixed) and that is always sufficient for one engine with about 3/4-1/2 gallon left over. As others have said, make sure to get as much air out as possible before sealing the plug. Also, the engine will continue to burp on its first run (after then engine heats up) so have some extra mixed solution on hand to top off the reservoir as needed.