Winterizing Yamaha F90 - Do I need to flush with antifreeze

[pckeen]

I'm winterizing a 2010 Yamaha F90. Our temperatures get down to -40 celcius. Do I need to flush the cooling system with antifreeze or should I simply drain the system by leaving the motor in the upright position?

 

[pckeen]

Re: Winterizing Yamaha F90 - Do I need to flush with antifreeze

Can anyone help with this question?

 

[Georgesalmon]

Re: Winterizing Yamaha F90 - Do I need to flush with antifreeze

just let it drain with motor not tilted. no antifreeze needed.

 

[pckeen]

Re: Winterizing Yamaha F90 - Do I need to flush with antifreeze

Thanks for that - will do.

The last job I had to do on this was to drain the vapor separator of gasoline - I did that, but it took me a while to work out how to do it. Unlike most of the rest of the restoration, there were no youtube videos or advice on iboats that I could find, so I made one.

Here's a video of what I did. If you watch this, let me know if I did this right or wrong.

 

[Watermann]

Re: Winterizing Yamaha F90 - Do I need to flush with antifreeze

Hey nice job on the video Peter. One of the good things about an outboard is all you have to do is drop them down into the running position for the winter. Also if the boat is stored outdoors, leave the motor down so that snow and ice don't collect inside the exhaust hub.