Single point drainage system

[Doug Wechsler]

I am new to the group so thank you for allowing me to join

I have a 2014 210SLX with a mer cruiser 5.0 MPI. In winterizing my boat, since I have a single point drainage system I always run boat until warm, drain engine with blue drain knob and run the engine with cuff using about 6 gallons through motor. Following this I drain engine and then refill with pink marine antifreeze. Anything I missed in the process? Also since I have the blue drain knob does that mean my boat is a single point drainage system?

many thanks

 

[Lazy Daze]

Do you have an Alpha or Bravo drive? There may be something to add based on that.

The drain system you have was a good idea, but it was soon found out that all water may not drain as intended - especially the block drains. If you look at the water drain manifold (the back side), you will see (4) small hoses. These come from the block and the manifolds. If these hoses (or the fitting at the block, for example), get clogged you would have no way of knowing if that area was actually drained or not. And there really is no way of knowing if the antifreeze you added fully pushed out the standing water.

Best practice is to drain everything with the blue handle and then pull the hoses off with the quick disconnects and probe the holes. Once you're sure that's done you can then add the AF. I like to pour the AF in through the t-stat hoses as I feel that does the best job of ensuring any pockets of water are pushed out. Using a jog isn't "bad", though.

 

[Doug Wechsler]

Do you have an Alpha or Bravo drive? There may be something to add based on that.

The drain system you have was a good idea, but it was soon found out that all water may not drain as intended - especially the block drains. If you look at the water drain manifold (the back side), you will see (4) small hoses. These come from the block and the manifolds. If these hoses (or the fitting at the block, for example), get clogged you would have no way of knowing if that area was actually drained or not. And there really is no way of knowing if the antifreeze you added fully pushed out the standing water.

Best practice is to drain everything with the blue handle and then pull the hoses off with the quick disconnects and probe the holes. Once you're sure that's done you can then add the AF. I like to pour the AF in through the t-stat hoses as I feel that does the best job of ensuring any pockets of water are pushed out. Using a jog isn't "bad", though.

Thanks for the response -how do I know what type of drive I have - alpha or Bravo

 

[Lazy Daze]

Bravo is bigger and has the raw water pump mounted on the engine (belt driven) as opposed to inside the lower unit. A Bravo III would have twin props (counter-rotating), however a Bravo 1 would only have a single prop like the Alpha. It's unlikely you have a B1 - so it's either a B3 (super highly unlikely to be a B2) or an Alpha.

Google will help, too!

And... there is a sticker on the side of the drive that says what it is (if it's still legible)

 

[Espos4]

Read this…..

http://www.clubsearay.com/index.php?threads/testing-single-point-drain-system.107136/