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Apr 24 2015 10:10 AM | island time in Articles



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ISAF Sailing World Cup Hyeres:

Apr 24 2015 09:22 AM | island time in Articles

Yachting New Zealand Media Release
24 APR 2015

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Burling and Tuke near perfect on day two
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Racing continued for the NZL Sailing Team in France today at ISAF Sailing World Cup Hyeres Regatta where our 2012 Olympic medallist crews hit their stride.
On the skiff course Peter Burling and Blair Tuke were showing everyone else how it’s done, while in the Women’s 470 Jo Aleh and Polly Powrie have made major gains on the leader-board.
49er & 49erFX: After a near perfect day on the water Peter Burling and Blair Tuke have opened up a solid leading margin in the 49er skiff class. Adding two bullets and a 2nd place on day two of the five day long regatta, the kiwis are out in front by 21 points with Denmark’s Jonas Warrer and Anders Thomsen now in 2nd place.
Team-mates Marcus Hansen and Josh Porebski have slipped to 18th.
Alexandra Maloney and Molly Meech improved their overall position in the women’s 49er FX climbing to 7th overall with a 14th, a 4th and a 9th in today’s three races.
Maloney reports; “After a slow start we connected a few more pieces of the puzzle day two into Hyeres Sailing World Cup. We are determined to make each race more complete in the coming few days.”
470: Women and Men: Lying 11th going into today Jo Aleh and Polly Powrie have climbed up the ladder with two solid single-digit race results today – a 6th and a 5th. All three teams at the top of the leader-board, including the kiwis, Hannah Mills and Saskia Clark (GBR) and Anne Haeger and Briana Provancha are lying equal on points.
The Brazilian and Slovenian crews in 4th and 5th aren’t far adrift and the scene is set for another exciting battle over the coming two days of racing which lead up to Sunday’s medal race.
Paul Snow-Hansen and Daniel Willcox are lying 10th in the Men’s 470 class.
Finn: Changing fortunes on the Finn course today have seen Andrew Murdoch slip to 13th on the leader-board suffering from a DNF in today’s first race. In contrast, Josh Junior had a better day and climbed up the ranks to 17th overall after placing 7th and 10th in today’s racing.
Laser & Radial: New Zealand’s Laser sailors struggled for consistency today and only Andy Maloney remains in the top ten of the 40 boat fleet. He is in 10th, Sam Meech is 13th, Mike Bullot is 21st and Thomas Saunders is 25th at the end of days two.
Sara Winther is lying 24th in the Laser Radial.
Nacra 17: Gemma Jones and Jason Saunders are now in 16th overall in the mixed multihull.
Women’s RS:X: Natalia Kosinska has moved from 21st up to lie 17th at the end of day two finishing today on a high note with a 3rd place.
Racing continues in Hyeres tomorrow with another two days of racing remaining before the top ten medal races scheduled for Sunday.
2015 ISAF Sailing World Cup Hyeres
NZL Sailing Team current standings (full results here)
1st Peter Burling and Blair Tuke – 49er (2, 9, 3, 1, 1, 2)
18th Marcus Hansen and Josh Porebski – 49er (9, 12, 19, 29, 16, 35)
7th Alexandra Maloney and Molly Meech – 49erFX (12, 16, 18, 14, 4, 9)
3rd Jo Aleh and Polly Powrie – Women’s 470 (3, 25, 6, 5)
10th Paul Snow-Hansen and Daniel Willcox – Men’s 470 (24, 7, 18, 5)
13th Andrew Murdoch – Finn (5, 5, DNF, 28)
17th Josh Junior – Finn (33, 27, 7, 10)
10th Andy Maloney – Laser (12, 9, 18, 7)
13th Sam Meech – Laser (11, 2, 23, 39)
21st Mike Bullot – Laser (21, 18, 12, 22)
25th Thomas Saunders – Laser (16, 30, 14, 30)
24th Sara Winther – Laser Radial (26, 11, 19, 32)
17th Natalia Kosinska – Women’s RS:X (27, 13, 28, 11, 3)
16th Gemma Jones and Jason Saunders – Nacra 17 (5, 18, 29, 10, 14,14)

Photography
High resolution images of the NZL Sailing Team in action each day in Hyeres will be available for media use. Please email jodie@yachtingnz.org.nz.
How to follow the action
Yachting New Zealand Latest News – for daily NZL Sailing Team media releases
NZL Sailing Team Facebook page – for NZL Sailing Team images and updates
Regatta website - For full results, the latest news, interviews with competitors, photos, and videos.

More about 2015 ISAF Sailing World Cup
Documents governing the 2015 ISAF Sailing World Cup are available here - www.sailing.org/world_cup_documents.php
The ISAF Sailing World Cup is a world-class annual series for Olympic sailing. It is open to the sailing events chosen for the 2016 Olympic Sailing Competition. Its centre piece is the ISAF Sailing World Cup Final in Abu Dhabi, United Arab Emirates in late October.
The 2015 ISAF Sailing World Cup consists of five regattas for all ten Olympic events (and where possible, Formula Kite Racing). Qualification places for the ISAF Sailing World Cup final are up for grabs at each event. The final will bring together the top 20 boats in each Olympic event where the World Cup Champions will be crowned.
For more information…
Jodie Bakewell-White
Tel. 021 709 065
Email. jodie@yachtingnz.org.nz


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Finn Focus

Apr 24 2015 09:19 AM | island time in Articles

Posted ImagePosted Image Giles Scott takes lead after ‘upgraded’ second day in Hyeres
Giles Scott (GBR) has taken pole position in the Finn fleet at the ISAF Sailing World Cup Hyeres after a day of tough sailing in winds around 16-18 knots. He leads from Ed Wright (GBR) and Pieter-Jan Postma (NED).

After another delay to wait for the wind, the Finn fleet eventually got in two slightly late races. The wind was forecast to come in stronger than on Wednesday and did just that. Race 3 started in stronger wind, which completely changed the leaderboard from the day before.

Tapio Nikko (FIN) led Caleb Paine (USA) round the top mark from the right ahead of Vasilij Zbogar (SLO) and Giles Scott (GBR). Ed Wright (GBR) rounded in fifth and moved into the lead on the first downwind. He maintained his lead on the second upwind while Ivan Kljakovic Gaspic (CRO) moved up to third. However on the final downwind Tapio Nirkko (FIN) moved ahead for the win from Wright and Kljakovic Gaspic.

Most of the favourites were up the front, however it was a disaster for overnight leader Andrew Murdoch (NZL), who suffered sail damage, and was unable to finish the race.

The wind had increased by race 4 and the majority favoured the right again on the first beat. At the first mark it was Paine followed by Pieter-Jan Postma (NED) and Zbogar. Scott rounded in fifth but quickly moved up to second downwind to round the gate behind Zbogar. On the second upwind, Postma and Scott stuck together and Postma just squeezed round the next mark ahead. Björn Allansson (SWE) led the chasing pack in third after making gains on the right. The dual at the front continued downwind with a big gap to the rest of the fleet. Never more than three or four boatlengths between them they battled downwind. Scott made his move with less than 500 metres to the finish as he eased past the Dutchman. Zbogar made some gains right at the end to snatch third place.

A fifth and first moves Scott to the top of the scorecard, while a second and fifth also moves up Wright to second. Wright said, “We had an upgrade in conditions over night. Great hiking conditions and downwinds but there were still some big holes in the wind to keep it interesting. I had two average starts but came through with some good speed upwind rounding top five in each race. The downwind of the first race was magical as I managed to gybe and get clear of the sails and just pulled away with some good speed, which is good as I have been working hard on technique and changing styles recently. Overall a fun day.”

Nirrko followed the win in race 3 with a sixth to move up to tenth overall. “In first race I didn't start so good but managed to get clear lanes until all the way up in good pressure so managed to round first. Ed passed me on the first downwind and we came to the second top mark in same order. On the last downwind I got good groove on and passed Ed to get the bullet.”

“In the second race it was a tricky first upwind after a poor start. Yet I had good speed around the course, which helped me to climb couple of places to finishing sixth. Good day all in all after yesterday's disaster.”


Another big climber was Björn Allansson, now in sixth. “It was full power sailing today and good fun. In the first race I didn't have a perfect start but fought my way back on the first lap. In the second race I had a good start and after that it was a lot easier.”

Overall leader Scott said, “The breeze came in and it was a lot steadier today but it certainly wasn’t straightforward. It was a bit of a hike-off really. It was a very physical day and pretty exhausting, but very good to come away with a five and a one and to just sneak by and get PJ was a good way to end it.”

The opening series is now at its half way stage and will conclude on Saturday, with the medal race following on Sunday. A lot of those in the top 10 already have a high score lurking, so there is still a long way to go for everyone.

Results after 4 races
1 GBR 41 Giles Scott 7
2 GBR 11 Edward Wright 10
3 NED 842 Pieter-Jan Postma 13
4 SLO 573 Vasilij Zbogar 21
5 SWE 6 Björn Allansson 26
6 FRA 112 Jonathan Lobert 27
7 ITA 146 Michele Paoletti 30
8 ESP 7 Alex Muscat 33
9 USA 6 Caleb Paine 33
10 CRO 524 Ivan Kljakovic Gaspic 34

Full results here
More photos here

Photo: Ocean Images/British Sailing Team

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NZL Sailing Team prepare for new format ISAF Sa...

Apr 20 2015 02:27 PM | island time in Articles

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The NZL Sailing Teamis in France preparing for the up-coming ISAF Sailing World Cup Hyeres Regatta which gets underway two days from now running from Wednesday 22 April until Sunday 26 April.
Image: Jo Aleh and Polly Powrie in action earlier this month at Princess Sofia Regatta, Spain © Sailing Energy
This important Olympic class regatta, which has a 47 year history, is the third of five events which lead up to the ISAF Sailing World Cup Final in Abu Dhabi later this year.
Changes to the format of the ISAF Sailing World Cup (the premier international sailing series for Olympic class sailors) mean that fleets are restricted, by invitation, to only 40 in each of the ten Olympic class events being contested in Hyeres, France.
Jo Aleh and Polly Powrie, New Zealand’s top Womens’ 470 crew arrived in Hyeres a week ago to train and prepare. “We’ve been out on the water in some good breeze today with a few other boats doing some line ups, great fun! Nice to be out again, looking forward to the next few days of training before we get racing next Wednesday.”
“It’s a bit strange, as with this new ISAF World Cup format there are only forty boats in each fleet. So what used to be a fleet of 160 plus Lasers is now 40. Its not as much of a change for us, from a typical fleet of 60 to 40, but it should be nice to be able to race what is essentially the gold fleet for the whole regatta.”
The NZL Sailing Team has 14 separate entries (20 sailors) competing in nine classes.

NZL Sailing Team at 2015 ISAF Sailing World Cup Hyeres
Jo Aleh and Polly Powrie – Women’s 470
Paul Snow-Hansen and Daniel Willcox – Men’s 470
Peter Burling and Blair Tuke – 49er
Marcus Hansen and Josh Porebski – 49er
Alexandra Maloney and Molly Meech – 49erFX
Josh Junior – Finn
Andrew Murdoch – Finn
Mike Bullot – Laser
Andy Maloney – Laser
Sam Meech – Laser
Thomas Saunders – Laser
Sara Winther – Laser Radial
Natalia Kosinska – Women’s RS:X
Gemma Jones and Jason Saunders – Nacra 17


How to follow the action
Yachting New Zealand Latest News – for daily NZL Sailing Team media releases
NZL Sailing Team Facebook page – for NZL Sailing Team images and updates
Regatta website - For full results, the latest news, interviews with competitors, photos, and videos.


More about 2015 ISAF Sailing World Cup
Documents governing the 2015 ISAF Sailing World Cup are available here - www.sailing.org/world_cup_documents.php
The ISAF Sailing World Cup is a world-class annual series for Olympic sailing. It is open to the sailing events chosen for the 2016 Olympic Sailing Competition. Its centre piece is the ISAF Sailing World Cup Final in Abu Dhabi, United Arab Emirates in late October.
The 2015 ISAF Sailing World Cup consists of five regattas for all ten Olympic events (and where possible, Formula Kite Racing). Qualification places for the ISAF Sailing World Cup final are up for grabs at each event. The final will bring together the top 20 boats in each Olympic event where the World Cup Champions will be crowned.

Photography
High resolution images of the NZL Sailing Team in action each day in Hyeres will be available for media use. Please email jodie@yachtingnz.org.nz.

For more information…
Jodie Bakewell-White
Tel. 021 709 065
Email. jodie@yachtingnz.org.nz


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ISIS Threat to Yachts

Mar 26 2015 01:29 PM | island time in Articles

The Republic of the Marshall Islands has issued the following Yacht Advisory YSA-1-15
TO: Commercial and Private Yacht Masters, Owners, Yacht Managers, Agents, Classification Societies and Appointed Representatives

Please be advised that yachts and other shipping in the Mediterranean could come under attack from heavily armed ISIS fighters using speedboats to conduct attacks from the Libyan coast. It is feared that luxury yachts could be singled out as part of a piracy campaign that would threaten shipping from Gibraltar to Greece. ISIS pirates would pose a greater danger than the Somalis who have attacked shipping in the Indian Ocean because they are better armed.
Please also refer to previously issued YSA-4-12 Indian Ocean piracy and YSA-2-11 on Piracy in High Risk Areas.


Source:
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New Offshore Race Kerikeri to Vavau

Mar 23 2015 08:13 AM | island time in Articles

RACE TO VAVAU
The Kerikeri Cruising Club is organising a race from Kerikeri to Vavau planned for 2016 to celebrate the 80th birthday of the club.
The proposed race will depart Kerikeri late in May and covers a distance of 1180 miles to a new off-shore race destination.
Assistance has been approved from the Tongan Government Tourism Authority and the Vavau Yacht Club as well as several local businesses in Vavau.
The Chairman of the Vavau Race Committee Mark Beauchamp has been working on the proposed race for 12 months and says that all that is required now is to go through the formalities with Yachting New Zealand. This will be the third time Kerikeri Cruising club has run an off-shore race to alternative destinations, the first two being to Port Vila. Beauchamp hopes that the new destination will help revitalise off-shore racing in New Zealand.

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Finn Class

Mar 23 2015 08:21 AM | island time in Articles

The latest news from the International Finn Association.
Visit our website at www.finnclass.org

View this email in your browser

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Dinghy Academy goes from strength to strength + video
Part 1 - beginnings and skill development

The Dinghy Academy in Valencia is going from strength to strength. Established two years ago by 2000 Olympic Finn silver medalist Luca Devoti as a way to develop the skills of aspiring Olympians in a group training environment, it has come of age and is ready to take the next step forward. More and more sailors are benefitting from his unique experience and coaching style, and the first class facilities offered at the Academy, which is located in the extensive grounds of the Real Club Náutico de Valencia.

In 2013 the Finn class partnered with the Dinghy Academy to part fund up to four sailors each year to train at the Academy, help out with equipment charter and purchase as well as travel to major events. That initiative is continuing with three sailors already signed up for 2015 season. Each sailor has to agree to specific goals and a training/regatta schedule and they can benefit from charter boats, sailing and fitness coaching as well as working in a very focussed sporting atmosphere of continual learning and improvement.

A visit in mid-March coincided with the Open Internacional Vela Olimpica, organised by the Real Club Nautico. Twenty-two Finn sailors of all abilities were taking part in the regatta, many as part of their final preparations before heading over to Palma for the Princesa Sofia Regatta. With six race winners from the six races sailed, it was clear that this is a wide open fleet with a wide range of sailors. There is always someone to learn from

The Real Club Nautico has the perfect location for a training base, with extensive facilities including a gym, restaurant and an Olympic sized swimming pool. The weather and wind is about as pleasant and reliable as anywhere in Europe with wind all but guaranteed on 98 out of every 100 days. The Academy has attracted all types of Finn sailors from juniors setting out on the journey to Masters warming up before a major championship.

One of the race winners last week was Alejandro Foglia (URU). He has already been to the Olympics three times in the Laser, with a best result of eighth in London 2012, before stepping into the Finn in 2013. However his Finn campaign didn’t start too well with a back problem in his first regatta. “I got injured in Palma and had to stop for almost a year. I had a slipped disk in my lower back so it was hard because I was used to training hard. I am an active person, so one year out was hard, but on the positive side I had more time to finish my physical education studies. Now it is back to 100 per cent OK, but of course I need to care of it.”

Foglia was one of the first sailors to receive funding from the Finn Class through its FIDeS programme (Finn International Development Support). “I am very happy to be here. I moved here to train and now live here all year round. We have a very good group here. It is the best option for me if I want to train in a good group.”

He described a typical training period in which recovery is as much a part of the programme as on the water work and physical training. “We have a routine of three weeks training and one week off, which is basically recovery training. During the three weeks the loads are gradually increased. We train on Monday, Tuesday and Wednesday and then recover on Thursday. Then on Friday and Saturday we train harder and then have Sunday off to recover. We do that with increasing loads over the three weeks and then take a week off. If there is a regatta coming then we take a week off before the regatta.”

“We did endurance training from October to January. Now we are just maintaining that and increasing intensity with weights in the gym and sailing of course. The amount we do of each activity depends on the wind. If we look at the forecast and have a hard week coming then the most important thing is to sail, so we train in the gym but not as hard as if the wind is are light, because you want to be fresh when you go sailing to do the best you can.”

Like many sailors his main focus this year is on the world championship in Takapuna in November, the second Olympic Qualifier for nation places in Rio. “New Zealand is the final goal for us as a lot of guys here still need to qualify for Rio. We are working hard to get there but step by step. First we go to Palma, maybe Hyeres if we qualify and then the Europeans. I have some funding but I still need more. I am now involved in some crowd funding to buy a new mast, and many people are supporting me. If a lot of people give a little I can get a new mast. I also have an Olympic Solidarity Scholarship from the IOC. It’s helped me a lot it doesn’t cover everything.”

One of the past Olympians choosing to train in Valencia over the winter is Giorgio Poggi (ITA). He said, “It’s a nice group for training. All the guys training here have different skills so every day you have different guys going well, so every day you have to push because someone will always be sailing well. The conditions are beautiful, with great weather and of course with Luca he knows how to train and gives good advice and how to trim and find perfect speed.”

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[click on image for video]

The ‘head sailor’ in Valencia is the 2013 European Champion, and double Olympic Laser medalist, Vasilij Zbogar (SLO). “For me Valencia is a great training place where I can focus just on the sailing.”

“For a guy like me that is from a small country with just few Finn sailors, the academy it is a great place to train with other sailors. Valencia is a nice town, and the Real Club Nautico and all the facilities, good weather and wind all year around will ensure a long and successful future for the Dinghy Academy.”

Head Coach Luca Devoti said, “Sailors who come here just get better day by day. The tough training and competition makes them grow at all levels from masters to top champions. The camaraderie between the sailors and the fact that we share all the information makes us grow day by day.”

“Since we started we have had more than 50 sailors coming here over the first three years of life. All kinds of sailors learn, they learn from the champions here and they share their passion. For this, Valencia is magic...I hope the Dinghy Academy will become the reference for dinghy sailing in a modern doping free, friendly and competent environment.”

In Part two we will talk to some of the newer sailors joining the Dinghy Academy and find out what they are getting out of it, as well as looking at what the future holds.

More photos can be seen here: https://www.flickr.com/photos/finnclassphotos/sets/72157649051085874


Or on Facebook here
.

All photos © Robert Deaves


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The Dinghy Academy

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Giorgio Poggi, ITA

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Alejandro Foglia, URU

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Close racing

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Composting Toilets

Mar 18 2015 11:24 AM | island time in Articles

Composting Toilets are becoming more common on boats in NZ. I have just fitted one to Island Time. This is partially due to the increasing prevalence of no discharge zones, and because our old Lectrasan treatment system was starting to smell, and needed another electrode pack...

The advantages of a composting head, when correctly installed and used, are;
  • No Through Hull
  • No pump or macerator
  • Virtually no smell
  • Very simple install, anywhere
  • No holding tank required
  • Zero discharge - use it anywhere!
I've written a bit about installing the unit I chose, the Airhead, (Click "Read Story" below)
If you'd like to order one, or get some more info, click HERE

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Lancer Support Team Alvimedica

Mar 17 2015 08:39 AM | island time in Articles

LANCER Sea Blade Support Team Alvimedica During Auckland VOR Stopover



Auckland, New Zealand.

During the Volvo Ocean Race stopover in Auckland, Team Alvimedica will be using the SB22 Sea Blade to implement their on water Hospitality program and media requirements
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The Sea Blade’s unique hull form delivers stability and comfort which makes it a perfect platform for supporting the Team. Team Alvimedica Marketing Director Andrea Tagliamacco said, “Having a high performance RIB is key to providing our guests with a unique, comfortable and safe on the water experience”. The Sea Blade initially joined the team 25 kilometres north of Auckland for the arrival where it provided a front row seat for the Team Alvimedica’s media team.

Charles Winstone of Sea Blade, “it has been a great opportunity to work with Team Alvimedica who I think has been adopted by most Kiwis as the boat with the most New Zealanders. It has been fun supporting them and we look forward watching them for the rest of race”.

Team Alvimedica’s racing will resume on the 12th March with the first Pro-Am race with daily in port racing until the leg start on the 15th March. During which time the Sea Blade will be on duty as a support and media boat.

The Sea Blade will launch the first production model at the Hutchwilco Boat show this year and is set to be game changer for sea worthiness and luxury. For more information http://www.lancer.co...nd-performance/ or contact Lancer Industries Ltd 0064 9 837 1206 info@lancer.co.nz

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Yearly Maintenance - Cleaning Heat Exchangers

Mar 08 2015 03:21 PM | island time in Articles

I've just done my heat exchanger servicing. This is a job that should be done every year or so. If you don't do it, your engine will eventually overheat, and if you have an engine driven fridge, it may not work properly either!

Heat exchangers 101 (skip this bit if you know about them already!)

So, basically a heat exchanger is a series of pipes inside a container. The pipes carry cool fluid (seawater here) through whatever needs to be cooled in the container (Water, Oil, Refrigerant etc). Heat is transferred from the container to the fluid running thru the tubes, exchanging the heat - hence the name of course!

There are a few issues with seawater as a coolant, which, as boaties, we need to be aware of. Firstly, it is corrosive, secondly it can cause electrolysis in dissimilar immersed metals, and third, it carries sea life and salt!

To combat these, your heat exchanger/s and or cooling system is made of durable materials that (hopefully) don't rust away too quickly! Not much you can do about the construction of the system unless you are replacing stuff, and that's beyond the scope of this article.

The second item, electrolysis. To combat this, your system will likely have an anode, especially if the heat exchanger has no electrical connection (other than sea water!) with the main engine. Make sure you check and replace the anode as required - not to do so will lead to premature failure of the heat exchanger. = $$$

The third issue is sea life and salt. Salt deposits and sea life (mostly small shellfish and barnacles) can block the small tubes in the heat exchangers, and slow or even stop the flow of cooling water. This can lead to catastrophic overheating. More $$$! So, yearly checking and cleaning is a good idea.

Remember you may have more than one heat exchanger. I have three - Fridge, oil and engine. Blockage of one or more will reduce the flow of water from your exhaust. Your exhaust discharge should not be hot enough to steam - if it is, the flow may be partially restricted!!

Cleaning:
So, here is the cleaning process. Firstly, the units must be identified and removed. Follow the path of the water from your engine through hull. Here is a pic of my engine, showing the raw water (seawater) pump, and the location of the heat exchangers. The Oil H/E is hidden from view, behind the engine H/E and the alternator.
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To help with access, I removed the alternator, here is a pic showing the small oil cooler (H/E) behind the engine H/E
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So, now you must remove the heat exchangers, and take them apart. CAUTION - the fridge one will contain pressurized refrigerant!! Make CERTAIN that you only remove the water connections!!!

1st Drain the engine coolant. Here is what my Heat exchangers (Volvo 2003T) look like removed;
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The top two pipes with the circular fittings are the oil inlet and outlet for the oil cooler. The water comes from the raw water pump, through the fridge heat exchanger, then the oil cooler, then the engine heat exchanger, finally out thru the exhaust.
So, now take the ends off, and you can remove the cores. In this case the fridge unit had a partially blocked outlet, restricting the water flow. Here is the engine H/E with the core removed;
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As you can see, the core is a bunch of small tubes. In this case, they are about the same dia as a .22 rifle bore, so I use a rifle cleaning brush to thoroughly clean them. They were not bad this time. However, the oil cooler has smaller tubes, and was pretty blocked – mostly with sea life, as you can see here;
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Now, some people use Acids to clean these, and it certainly works well. However, be warned – if there are any damaged joints, or thin piping, acids can ruin the core, and replacements are expensive. A radiator repair shop is your best bet for repairs, and can often supply replacement cores MUCH cheaper than a genuine part. Personally I use a calcium/lime/rust removal product, which is much gentler, but also slower. I left this to soak in CLR for a few hours, then rodded out the remainder with stiff wire.
Finally, reassemble everything, replace the engine coolant including a good corrosion inhibitor, replace the heat exchanger anode/s, check for leaks and you are good for another year or so!
As an aside, now you know your system is clean, change the raw water pump impeller, and then note how much water comes from your exhaust at idle - any reduction over time in this flow is an early indicator of a problem.
Oh, I last cleaned these units about 18 months ago, and the boat is used most weekends, year round. Seems the warmer the water the more of an issue it is! This boat is based at Gulf Harbour in Auckland. The growth here is faster than when we were at Mana in Wellington.
Happy Boating!!

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