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Motor flushing

AaronCarl

Member
Messages
8
Reaction score
1
Points
10
Boat Make
Yamaha
Year
2024
Boat Model
FSH Deluxe
Boat Length
25
I have a new 2024 Yamaha 255 FSH boat we just picked up and it will be staying in the water while we are in the keys for a month can I flush these engines while it is in the water

Thank you
 
Hi,

Welcome to the greatest site.

Watch out for the shallows. What parts in the Keys?

You can flush it with fresh water if it's on the lift.

Congrats on new boat
 
You can flush it while it’s sitting in the water, but salt water will come back up water inlet from the jet pump. I’m sure that will help some as it will push salt water out of the engine. Just be sure you follow the same procedure of engines on water on then water off then quickly engine off. The only way to really flush them while sitting on the water is to have valves on the water inlet from the jet pump Where you can cut off the cooling water from the jet pump. How long do you plan on having it sit saltwater?
 
We just got back from a week in Islamorada. The Sargasso weed was really bad in the ocean and in the bay near the cuts. Even after multiple "Crazy Ivans" I got over heat alarms at low speed. No problems above 3,000 rpm. No problems after we got home.
Here is what I did to flush while still floating:
Based on this thread you could clamp the line highlighted in the picture in red and flush with the engine off and not risk hydrolock. Your call on this one.

One last warning in shallow water, ONLY MOVE FORWARD. In Neutral and reverse you risk sucking up sand.
IMG_0518.jpeg
 
Yes I have a beavertail skip I normally bring down and it gets alge growing on it
 
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