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I am losing about a half of gallon of antifreeze after

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I am losing about...

I am losing about a half of gallon of antifreeze after running for about an hour. the boat is not over heating under way about 22 knots but once I idle down the alarm.
Have had the system pressure tested and replaced the exhaust manifold gaskets but it is still accruing any idea what to do next.

Mechanic's Assistant: Sometimes boat issues seem like they'll be really complicated, but end up being easy to fix. The Marine Mechanic I'm going to connect you with knows all the tricks and shortcuts. Is there anything else the Marine Mechanic should be aware of?

I have all my engine work done by a certified Mercuiser mechanic but we are both scratching our heads since there is on antifreeze in the oil and I compression in all cinders are good.

Submitted: 8 months ago.Category: Boat
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Answered in 5 minutes by:
7/31/2017
Marine Mechanic: Jason, Marine Mechanic replied 8 months ago
Jason
Jason, Marine Mechanic
Category: Boat
Satisfied Customers: 16,777
Experience: Degree in Marine Technology. Gas and diesel marine mechanic.
Verified

Hello my name is ***** ***** am I speaking with? I read what you wrote. Which engine do you have specificially? Do you happen to have a serial number on the engine so I can properly ID it?

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Marine Mechanic: Jason, Marine Mechanic replied 8 months ago

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Dominick
Dominick, Marine Mechanic
Category: Boat
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Experience: 25 Years Experience as Mechanic, 20 Yrs Boat Yard Owner/Mechanic, Factory Certified

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