losing antifreeze?

[ultrasport]

I have a 3.7 liter 4cyl 470 mercruiser and seem to be losing small amounts of antifreeze. Oil looks clean dont think its getting in the motor, thankfully and dont see any antifreeze around the bilge. Can I be losing a little bit going through the exhaust. Oh and its a fresh water cooled motor. Thanks.

[UpperUpsilon]

No expirience with closed cooling, but that sounds like your heat exchanger is starting to go. Doesn't seem like it's that bad though, considering your coolant loss is minimal.

[Rocky_Road]

My guess would be the heat exchanger...leaking into the raw water, and out the exhaust.