is this normal?

[brttkrz]

Is this a normal amount of exhaust? full throttle from start to 35mph with 1700lbs of ballast in a 95 sport nautique with the GT-40.

[jasper]

That looks like your cooling system is not cooling properly. Check impeller and/or leaks that suck air into the cooling system - all hose connections, water strainer, etc. My bet is impeller.

[xlair]

Doesn't look all that abnormal. If it was cool outside it would be more noticeable as it is just steam from exhaust.

[2001SAN]

http://www.planetnautique.com/vb3/sh...m-from-exhaust

http://www.correctcraftfan.com/forum...m-from-exhaust

[Laptom]

A CC would steam a bit more than an other ski boat, but I think this is too much. Check your internal water pump. Not allot people will renew those pumps.

[swc5150]

What were the weather conditions? Doesn't look out of realm of normal to me, depending on conditions.

[brttkrz]

Water temp was 53 and air temp was 55. The engine was running at 158 not sure if the thermostate ever opened up. Usually it will run right at 160. I put in a new impeller the middle of last season. I have noticed that the gasket at the top of the exhaust manifolds is leaking just a touch of water. Could this cause that?

[DanielC]

It is normal. Gasoline is a hydrocarbon. Burning it creates water vapor, and carbon dioxide, and some other gasses. Burning gasoline, or any other fuel creates heat. Your engine uses lake water to absorb some of that heat. That makes hot water, and some of it evaporates in the heat from the engine exhaust.

If the air temperature is close to the dew point, and it commonly is this time of year, all the extra water vapor from the engine makes fog, because when the exhaust is cooled to ambient temperature by the air and lake water, the exhaust is well below the dew point.

You do not notice the exhaust fog in the summer, because the dew point of the exhaust is above the ambient temperature.

[vision]

It is normal. Gasoline is a hydrocarbon. Burning it creates water vapor, and carbon dioxide, and some other gasses. Burning gasoline, or any other fuel creates heat. Your engine uses lake water to absorb some of that heat. That makes hot water, and some of it evaporates in the heat from the engine exhaust.

If the air temperature is close to the dew point, and it commonly is this time of year, all the extra water vapor from the engine makes fog, because when the exhaust is cooled to ambient temperature by the air and lake water, the exhaust is well below the dew point.

You do not notice the exhaust fog in the summer, because the dew point of the exhaust is above the ambient temperature.

Completely agree. Normal in colder temperatures.

[TRBenj]

Agreed, normal.

[xrichard]

I had a 95 Sport Nautique w/GT40--in cooler temperatures, yours looks just like mine did.