power loss oil in water

[tkriverman]

I have an 86 glastron 23' w/cc. It has a 205 v6 mercruiser. I drained the oil and about 2 gallons of water came out then some milky grey sludge. I pulled the heads and cleaned it all up. The pistons and sleeves look good. I checked the outdrive and the exaust boot had a tear in it. could this be where all the water came from? I still have the engine apart (heads off) is there anything else I need to do? Would this be the cause of loss of power? I also took apart the lower unit and checked u joints etc.. all ok except for water in lower unit oil. wot I should get 42-4600 rpm, was only getting 3000.

 

[Don S]

Re: power loss oil in water

2 gallons of water in the oil? ? ? ? Of course it will cause a power loss. You're lucky it ran at all.

Start looking for cracks in the block and heads, doesn't have to be in the cylinders.

Wouldn't happen to be the first time you used it this year would it?

 

[tkriverman]

Re: power loss oil in water

No I just bought the thing. The guy I bought it from kept it in the water all the time. It was the first time I took it out. It over heater (due to weeds) to 240 degrees. I let it cool down then ran back to the ramp. After the over heat is when the power problem came into play. I don't see any cracks in heads or block.

 

[tkriverman]

Re: power loss oil in water

also prior to the over heat it ran beautiful. The motor was replaced 2 years ago and the outdrive this spring.

 

[tkriverman]

Re: power loss oil in water

Could the exaust boot cause that much water in the oil?

 

[Don S]

Re: power loss oil in water

What I would do If I were you is buy the cheapest head gaskets and intake manifold gaskets you can find. Install the heads and intake, then block off the water passages for the water pump and thermostat housing. Then pressurize the cooling system through the block drains and listen for the leak.
With no crank, pistons or anything like that in the way you should be able to find the leak.
It could also be the cooling passages in the intake manifold.
Or you might get the block and heads magnafluxed. But don't rebuild it till you find WHY it leaked water into the oil.

 

[Don S]

Re: power loss oil in water

Could the exaust boot cause that much water in the oil?

No.
Nothing in the exhaust system will put that much water into an engine.
The ujoint bellows won't do it either.

 

[tkriverman]

Re: power loss oil in water

Ok thank you will try that tomorrow and let you know what I find. Thanks for the help / advice

 

[69slickcraft]

Re: power loss oil in water

how about a compession check?

 

[Don S]

Re: power loss oil in water

Hard to do a compression check with the heads off.

 

[tkriverman]

Re: power loss oil in water

Whew!! Ok after ALOTT of work finally got it all back together. Did the pressurizing of the coolant system. no leaks that I can hear. Fired it up on the hose and let idle for approx 15 min. Re-checked the oil, no water in it as of yet. will take it to the ST. Lawrence river this afternoon and hopefully will be good to go. I re-adjusted the idle back to 700-750 RPM. Not sure if thats correct, my manual doesn't get here till tuesday. But the engine fires right up first turn of the key, just like the good Ol days. Hopefully I'll be grinning from ear to to ear this afternoon. Thanks for the help will post another thread to let you know if problem is solved. Also where can I get an audible temp. alarm to avoid this problem in the future.

 

[tkriverman]

Re: power loss oil in water

Ok it worked great!!! got 4000 rpm at 27 mph. I should get 4400 to 4800 prob just a timing adjust or carb adjust. No more water in oil and every thing works ok. Man I got BIG smiles now.8)

 

[tkriverman]

Re: power loss oil in water

how about a compession check?

trim tabs would help you get on plane without the bow rise

 

[bomar76]

Re: power loss oil in water

how about a compession check?

trim tabs would help you get on plane without the bow rise

Most baffling post on iboats in quite a while.....

 

[Don S]

Re: power loss oil in water

how about a compession check?

trim tabs would help you get on plane without the bow rise

Most baffling post on iboats in quite a while.....

Why is it so baffling? It makes perfect sense unless the nav lights were on. Then I would guess a cleat attaching screw may be leaking. That is unless the lines were loose, then you could have a serious propwash spill.:%