Closed Cooling Diagram
 

I'm too lazy to figure it out otherwise than asking y'all but I want to back flush my closed cooling 496ho's. Which hoses do I disconnect to attach the water hose to and which do I undo to let the CRa_p out? Anyone with a diagram out there?

Thanks.

Re: Closed Cooling Diagram
 

I do not have a diagram available, but the easiest way I have found is, remove the lower hose on the right side of the main heat exchanger ( facing rearward). It is about 1 1/2" diameter. Find a suitable fitting that can be clamped in the hose. I found one at the local hardware store that would attach to a garden hose. Then remove the 2 blue drain plugs from the seawater pump. Turn on the water. I do this several times a year. you will be surprised how much debris will come out.

Re: Closed Cooling Diagram
 

does that clear out the oil cooler and heat exchanger as well?

Re: Closed Cooling Diagram
 

It will flush the oil cooler. The heat exchanger has plates on both ends that can be removed, and flushed by spraying water through it. I have rarely seen any debris here. Debris will usually stop at the oil cooler before it reaches the heat exchanger. In any case it only takes a few minutes to do both.

Re: Closed Cooling Diagram
 

Thank you for your replies. this will help a bunch.

Have a save and happy new year!