GT-40, shredded impeller, overheated and now it won't turn over...

[sperbet]

Any advice? I'm about to take it into the shop and am fearing the worst. Anything I can mention when I take it in?

[WakeSlayer]

How bad did you overheat it ?

[bchesley]

Its probably hydro locked due to the overheat. They will suck water back through the exhaust if they get hot enough. Pull the plugs and spin the motor over a few times.

[WakeSlayer]

And do it soon. Little oil down the cylinders too.

[surroundsound64]

And do it soon. Little oil down the cylinders too.

A little marvel mystery oil will work good as well. Just put in a squirt bottle and spray into the holes. Let it soak a bit then turn it over.

[sperbet]

Just wanted to update this in case someone has a similar problem in the future and searches the forum. I didn't find a whole lot of information in my searches.

I originally feared I had seized the engine. It was hydrolocked. We pulled the plugs and turned the engine over which shot water out. It had water in three of the cylinders. My friend who helped me with this thought the head gasket was likely blown. It then went to the shop. The compression was all normal indicating no blown head gasket, but there was water in the oil. They ran some sort of oil/solution mix through a few times and then changed the oil three times. Boat is now back and running fine much to my relief. Ended up costing a lot less than I originally expected.

[Texan1554]

Good to hear it, thanks for the update.

[DanielC]

Many years ago, I flooded a Honda 125 four stroke motorcycle fording a stream. After draining the exhaust pipe, and removing the spark plug, it started and I rode it home, and changed the oil. It was fine.

The real 210 is a Super Air. Unfortunately, Correct Craft quit making it in 2006.

[horkn]

Been there done that too. Exactly the same way as yours, except mine is about 25 years or so older. Hydro locked and it only needed to be drained and have new oil put in it. The sooner the better for draining any hydro locked motor.