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post #3 of Old 05-10-2009
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Please do not use gas drier if you are using e-10...

Originally Posted by Adam1986 View Post

Some may have noticed my thread about buying a Catalina 27 and asking for advice. Thanks to all who helped me with that!

I ended up buying her and am getting her ready to be launched. One problem I am having is that the tank appears to have some water in it somehow. The boat has an Atomic 4 which runs smooth as silk for a minute or two and then begins to sputter and stall. If I try to restart, it will restart and repeat but with no consistency with the amount of time it will run before it stalls.

I have a fuel/water separator temporarily attached (it is a clear one) and I can see that there is water getting trapped in there so I know that there is some water in the tank. The tank is pretty much empty (it is now sucking air on the primer) so I am wondering if it would be a good idea to put a bottle of HEET in the tank and fill her up to try to get whatever water is left removed.

I am also suspicious about the float sticking as the running for a few moments and then stalling seems like a fuel starvation issue although I believe it was just risidual water in the fuel lines from before the water/fuel separator was installed. Unfortunately, I didn't have enough time to try running it long enough to sufficiently flush all of the lines in the loop. The previous owner also stated that she had this issue unless she was attached to an external tank where it would run perfectly fine without a hiccup.

My question is if anyone has used HEET before and if it is safely applicable to marine use or with the A4. Any thoughts or ideas?
Because e-10 is 10% alcohol, and that is all the gas drier is. They would pull gas drier off the market, if they were honest.

The reason the engine will run but stumble is that the "water" is water/alcohol mix.

The trouble with e-10 is that if it gets ANY water near it it separates. See this EPA doc.

The only cure is:
* drain the tank. Get ALL of the water.
* make sure you have no water leaks. that is the probable cause in 90% of the cases.
* always keep the tank full. water absorption accounts for the other 10%.

The HEET will only make the problem worse, as it is alcohol and will join the water phase. It will not dissolve the water.

(I tested a bunch of additives for Practical Sailor, so I believe I am very solid ground here)

And keep draining the separator before every trip until the problem is cured. Good luck!

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