Engine flushing on slip

[Jatta]

Just purchased a 2019 Yamaha sx190 and ordered the tow/bypass valve as boat will be on water for the boating season.
Could you advise what is the correct engine flushing procedure when boat is on water?

 

[lazergeek]

Make sure you install your tow valve before the Y from the pump inlet. Close Valve, Start Engine, Turn on Water, Turn Off Water when done, Turn off engine after water is off.

 

[Jatta]

Make sure you install your tow valve before the Y from the pump inlet. Close Valve, Start Engine, Turn on Water, Turn Off Water when done, Turn off engine after water is off.

Thanks! ? Just to be sure, by before Y you mean towards the rear end? My plan is to install valve somewhere below the clean out tray as bottom as I can reach via the clean out ports.

 

[lazergeek]

Thanks! ? Just to be sure, by before Y you mean towards the rear end? My plan is to install valve somewhere below the clean out tray as bottom as I can reach via the clean out ports.

Correct. I have 12v electric valves on mine. I have a switch to engage them.

 

[TimW451]

Correct. I have 12v electric valves on mine. I have a switch to engage them.

Noice! Have you posted about that mod? That might actually make installing tow valves worth to me.

 

[lazergeek]

Noice! Have you posted about that mod? That might actually make installing tow valves worth to me.

Search "live well access" and you will find my thread where I did that

 

[Jatta]

Great idea. That will be my next winter project

 

[Jatta]

But needs a bit more diy as sx190 does not have that nice livewell system installed.

 

[Jatta]

At least not that i know of...

 

[lazergeek]

But needs a bit more diy as sx190 does not have that nice livewell system installed.

I only used the live well for my washdown fresh water storage. The flush valve install was part of that same thread. But not needed for flush valves

 

[TimW451]

This looks like the valve for the tow valves that @lazergeek used. Better price than I expected.

Amazon.com

EDIT: There are a lot of options for this device. If you are going to buy one read through it first to make sure it works like you want. I noticed that this one is normally closed (if power is lost it turns flow off). I don’t think that is a good idea. There are also models with manual on/off (this one has that), and wires to signal/light a switch.

 

[Jatta]

Got this plastic one from amazon. Will try this as tow valve and see how it works. It looks a bit light, but will wait for it to arrive and if decent, give it a go.

 

[lazergeek]

This looks like the valve for the tow valves that @lazergeek used. Better price than I expected.

Amazon.com

Correct, 3/4" Valve to maximize water flow with 3/4 MNPT to 5/8" Barb fittings to match the boat intake hose diameter.