Does water come out of the exhaust

[midtower]

I have a SeaRay, 1987, with a chevy 5.7L. My question is, does the water come out of the propeller area exhaust? My engine is heating up so I put on the water ears to test it. The water is coming out of the stern in all places. Its not coming out of the exhaust/propeller area! Cobra stern drive. Your help will be highly appreciated. Thank you.

Note: I had it in shop and they take the stern apart. But can't remember if the water came out of the exhaust/propeller area?

[Corpus Skipper]

Yes, water should come out of the prop hub with the exhaust. I would take it back to the shop that worked on it last, they goofed something up , or your water pump has gone bad.

[midtower]

I thank you very much Skipper, for your information and taking the time to respond. I was looking at the manual and it says something about the "impeller". Do you think that it maybe damaged?

Thanks again.
P.S.:
The shop I speak of is not a reliable shop. They did many things wrong and now I don't trust them at all. But thank you for your advice.

[Tim B]

My advice is to get it out of the water, then plug a hose-pipe onto the coolant inlet and run the hose for a while to check there are no leaks. You might also open the water-pump and check it. It is usually obvious to see if an impeller is broken. If you can't see anything wrong with it (No leaks, good impeller) then your problems are slightly harder. Ask around the yard and then goto a recommended shop and talk to them.

Good luck,

Tim B.

[woodboat]

When testing with the "ears" the thermostat has to open to get full water flow.

[midtower]

Thank you for the information and taking the time to respond. The impeller is good and water is flushing from beneath the stern and squirting about six feet of water from the impeller cover release hole . I tried to remove the lower gear case, but could not get it off? There is a little flow from the exhuast prop area, but I don't now much is suppose to flow from that area. It appears that the water is not flowing through the exhaust manifolds? I have a closed cooling system. Thank you again.

[midtower]

Thank you too. This is great. I removed the thermostat to see if the water pump is working. I removed the cap, started the engine and looked into the coolent tank and it the water was flowing in the tank. I just replaced the exhuaust manifolds and risers. Thank you again.

[woodboat]

My boat has three thermostats, two in the risers restrict raw water flow until the manifolds are warm.

[midtower]

My just has one on a 350 chevy engine. Just better circulation would be the best result once I get it.

[marshmat]

A Cobra was mentioned.... this drive does indeed spew water out all around, but it should come out the prop too. Check your thermostat for sure and check for any clogged or missing links int he coolant system... and yes, have the shop check it as this could indicate trouble with the manifold coolers, but it's only a guess for now...

[midtower]

Thank you matt. I just installed brand new exhaust manifolds and risers. It is a closed cooling system. Water is coming from the underneath the stern and some now is coming out of the exhaust at idle. Maybe it snapped it self in working? I thank all of you that have given me advice. Its really appreciated.

Midtower

[midtower]

Just came back from testing my boat. It over-heated to 220. Just barely started it drove 200 yards and the temp gauage hit 220. It smoked but didn't burn up. I then removed the thermostat and that didn't do any good? My brother towed me back to dock. I am perplexed?

New oil, new filter, tune-up, new exhaust manifolds, new risers, new impeller. SeaRay, 1987, with a chevy 5.7L.(350). Closed cooling system. Anyone have an answer or suggestion, I sure would appreciate it. Can't afford to have it fixed. I am not a boat repairman. Thanks to anyone that can suggest a resolution.

[woodboat]

Well a perfectly running engine will overheat without proper coolant and terrible running engine will overheat even with proper cooling. So if it is too lean or the timing is way out it will overheat. With that said did you try removing the last coolant line on the exhaust manifold to check for proper water flow? You could have an obstruction on the bottom of the boat for the raw water.

[midtower]

Thank you woodboat. Well, I just came in from changing the impeller again. It appears not to heat up with "water ears" is what I call them. So, I will be ordering a impeller kit to insure that it is not the problem ever again, I hope or least to eliminate one possible problem. I did remove both exhaust manifold hose's on the front of the engine and ran water through them. The water spewed out of the impeller housing. Of course I removed impeller housing to see the water come out. I will be taking it out again in a couple of days and let all that are concerned the results. Thank you woodboat.

[midtower]

Well, take the boat and it over heated in seconds to 220 +. I think I have a frozen engine now. I hope not. Any suggestions, other then sinking it?