myHanse.com - Hanse Yacht Owners Website myHanse.com - Hanse Yacht Owners Website myHanse.com - Hanse Yacht Owners Website myHanse.com - Hanse Yacht Owners Website

Welcome to myHanse.com the forum for Hanse Yachts owners throughout the world.

Forum Home Forum Home > Hints & Tips > 415/418
  New Posts New Posts RSS Feed - Raw Water Flush
  FAQ FAQ  Forum Search   Events   Register Register  Login Login

Raw Water Flush

 Post Reply Post Reply
Author
Message
Yeoey View Drop Down
Commander
Commander


Joined: 22 August 2016
Location: Australia
Status: Offline
Points: 121
Post Options Post Options   Thanks (0) Thanks(0)   Quote Yeoey Quote  Post ReplyReply Direct Link To This Post Topic: Raw Water Flush
    Posted: 06 February 2020 at 23:29
Hi everyone,

I can’t recall where I read, or who mentioned it to me, but I had on my agenda of “things to do” over next  12 months or so, to raw water flush/clean my Volvo D2-55 at some stage.

 Sea Rambler was launched in May 2014, and has has a little over 360 hours recorded, however I would suggest that hours does not have the relevance of indicating the job cycle, and time in water is more relevant. In future I will do it every 2 years.

After reviewing various uTube guides and chat room comments and speaking with local Volvo Penta dealer I went with a product called Barnacle Buster, steering well clear of  “do it your self” mixtures which suggested base acids that are more commonly used for cement and brick cleaning. BB “blurb” in forums and their web site, indicates it reduces calcium build up and other growth and is beneficial in rust resistance what ever that means.

I did a combination of both recommended ways ie flush method and soak method and found that I only used about 2 litres of the concentrate for the total process.

I purchased 2 x 15 litre plastic buckets - one used as the principal container , the other for disposing of water if required as I couldn’t find any indication on the net or with help of Volvo dealer of raw water capacity to assist with calculating volume of mixture required. So you could easily use smaller buckets of 10 litres each.

Using the raw water inlet line and after I closed the seacock, I disconnected that pipe and using 19mm angled joiner I connected a 1 metre line to the lowest pressure pump unit I could purchase (360gph) and placed in bucket with a cable tie at rim to hold pipe in place in case the pump wandered. this turned out to be sufficient. If I used my 900gph unit off my ETchells ,I  probably would have too much pressure and water coming out of the bucket onto bunks and all over me🤭🤭

I then traced the raw water return pipe from where it enters the exhaust elbow up to the attachment of the plastic u shaped fitting and disconnected it on its entry side which allowed for an easy attachment of an in line joiner of 1inch to to 3/4inch. I had a problem here as my mate who helped me found this a leak source as the rubber pipe was larger that 1 inch section of joiner so we wrapped sufficient tape around the joiner to stop leak.

I filled the pump bucket with 4 foot litres of water and using a 12volt jump starter battery pack as power source I pumped first lot of water through, then tipped out collection bucket and pumped another 2 litres in and tasted water which only had a slight salty taste. I then flushed about 5 litres of fresh through just to satisfy myself that I was rinsing whatever was growing inside.

I pumped the last of water out and mixed 1 litre of concentrate with about 3 litres of water (viz recommended 4:1) on the basis there was still some water in the system, poured it into the pump bucket and run for a few seconds with the return line in the other bucket for a few seconds to force out a little more of the water in the system then stopped and placed the return line in the pumping bucket and poured in a another large cup full of concentrate. 

The mixture is clear at first but within about 20 seconds of pumping the water colour became cloudy as the solution attacked whatever was inside the raw water section of the motor and I guess the water heater..

This was then let run for around 3 hours and then I went home and let solution sit over night. On return next morning I added another cup of concentrate and ran for about 15 minutes (interestingly 1 small shell with weed attached exited) then reversed the 2 lines and run for an hour ( 2 small shells this time) 

Yep took me some tme as I researched as much as I could by reading the net and asking others and very cautious in the connecting process, but have now got requests from 2 mates who have never done it to help them

I did confirm with Volvo that there is no internal zinc.

I will try again later with a further post to attach some pictures if I can.






Peter
Sea Rambler 415 # 137
Back to Top
Yeoey View Drop Down
Commander
Commander


Joined: 22 August 2016
Location: Australia
Status: Offline
Points: 121
Post Options Post Options   Thanks (0) Thanks(0)   Quote Yeoey Quote  Post ReplyReply Direct Link To This Post Posted: 07 February 2020 at 02:44
sorry excluded last part of process

Final job was to reconnect the outlet line back to the u shaped fitting taking water to exhaust elbow and then started motor to pump the bucket until dry with friend upstairs shutting motor down by me yelling etc just before it run dry. Then left to soak for 2 hours ie the exhaust elbow and outlet lines to rear of boat 
.then disconnected inlet from pump and reconnected to inlet on sail drive base.

Peter
Sea Rambler 415 # 137
Back to Top
 Post Reply Post Reply

Forum Jump Forum Permissions View Drop Down

Forum Software by Web Wiz Forums® version 12.06
Copyright ©2001-2023 Web Wiz Ltd.

This page was generated in 0.141 seconds.

Links : www.hanseyachts.co.uk www.hanseyachts.com www.fjordboats.co.uk www.dehler.co.uk www.varianta.co.uk