Quote:
Originally Posted by jaybhansen
It turns out that my cooling radiator was very low (empty). What I don't understand is that my overflow container still was half full. Isn't is supposed to supply more coolant when the radiator is lowering?
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You do need to "burp" the system, to get the air out of it.
Maybe read your Rotax manual on how to do so?
There is a radiator cap at the top of the engine, in front of the ignition system, that I would suspect has something to do with it, before you fill up the reservoir on top. Engine probably needs to be warmed up, to the point that the thermostat opens, in an open system, then that the radiator fills up with coolant.
Closed coolant systems are kind of tricky to burp.