Aq125 overheating oin plane

[volvoken]

My 19' Bayliner just start

My 19' Bayliner just started overheating on a plane this year. I have had the boat 3 years but have never cleaned the heat exchanger and dont know what chemicals i could use to clean it once removed. I have heard muriatic acid might be an option? I replace the impeller every year as well as the antifreeze. Any other suggestions would be appreciated.

Ken

 

[el_pescador]

"Check the raw water hose conn

"Check the raw water hose connector in the outdrive: it may be corroded and perforated, and in that case your raw water pump will be sucking more air than water."

 

[volvoken]

Thanks I'll check that and

Thanks I'll check that and keep you posted.

Ken

 

[volvoken]

The raw water hose connector i

The raw water hose connector is in ok shape with no perforations and minor oxidation. The heat exchanger on the other hand is not very clean and is in need of cleaning. What do you recomend to clean this with? Thanks.

 

[volvoken]

I have heard muriatic acid wor

I have heard muriatic acid works?

 

[RicardoMarine]

"Air can be pulled into a nega

"Air can be pulled into a negative pressure area much much easier than water can be.
The water neck is # 27 and it's gasket is #28.
The pivot tube O ring is #23.
All of these are extremely important to be in excellent condition and particularly when the drive is up and out of the water as it will be when on plane.

http://www.volvopentastore.com/mall/image/vendor/699/EPC/big/5973.png"

 

[sandkicker]

"Insert a short section of tra

"Insert a short section of transparent hose in between the raw water pump and the transom. Look for air bubbles. Also if you have a strainer, make sure that the gasket on the cover is intact."