2000 yamaha fourstroke 115 water in motor oil

[angler0520]

Hi i took my boat out last friday everything went fine. walked outside today and have a little puddle of oil on the driveway under my motor the oil was coming out of the water intake on the lower unit so i checked the lower unit oil just to be safe it is fine. when i went to check the motor oil oulled the dip stick out and water and oil gusshed out everywhere. i know a little about motors and was wondering if this means my base gasket is bad? does anyone have any ideas? THANK YOU

 

[jeffersondodson561]

Re: 2000 yamaha fourstroke 115 water in motor oil

First thing you need to do is drain the oil completely, put some new oil in and run it a few times and change the oil about 2-3 times, you can use cheap oil because you are going to do this until the oil no longer looks milky. Run it on a flushette for about 10 min/change oil check for milkiness, repeat 2-3X. You could have swamped the motor and sat in the cowel dripped down into the sump. Could have cracked block but definately do a compression test first.