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Author Topic:   carb cleaner, methylated spirits & oil ratios
k2 posted 10-24-2003 06:31 PM ET (US)   Profile for k2   Send Email to k2  
Some time ago I emailed "Gumout" and asked if their product carb cleaner would be safe to use in an oil injected Yamaha 70 outboard motor. They said perfectly safe and advised that it was a good thing to use. I have used it on numerous occassions with seemingly no ill affects on the motor.
I now have noticed on another forum where the tech say's that one should never ever use these products in an outboard. So who is right?

I have also read that methylated spirits are good for soaking up water in the gas tank. Is this also OK?

Also at a speed around 15 knots what ratio of oil would be used in my 70? I figured 75.1.
Thanks for any input.

lhg posted 10-24-2003 07:14 PM ET (US)     Profile for lhg    
For soaking up water in a gas tank, there is really only one product. The last thing you want to do is add a product containing alcohol, like Drygas. If the boat sits for a few months, you will get phase separation and end up with highly corrosive combination of water & alcohol that eats the aluminum tank.

The product to use is by MDR, called WATERSORB. It emulsifies the water in the tank and allows it to be burned in the engine. It does not contain alcohol. This product should go into every built-in aluminum tank before winter layup.

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