water water ever where!!!!!!

[rich]

My old fairline filled the bilges after she had been out of the water for the winter, the last thing i did before relaunching, was polish the hull with a power tool, we found a skinfitting on the stern just above the water line,for the cockpit drain, had come lose, at speed it was under water,

 

[Ocean_Driver]

Not sure if it is applicable in this case, but I have come across several examples of new Volvo D6 engines having splits in the strainer boxes. These do not show up until the boat is under full load, then water is p*****g in!
This probably occurs as a result of people standing on top of the engines, or maybe from excessive cold.

 

[Nautical]

Had this myself once last year in the med and similar situation also with twin D6's. Turned out to be the screw on caps to the raw water strainers which you inspect before start up. There is a clear plastic lid underneath the main black screw lid that has a rubber O ring, if the ring gets nipped putting it back on or the screw cap is'nt really tight once the load comes on the engines and pressure builds its monsoon showers everywhere. People don't realise the pressure in there once everything at full chat, knock it back to idle and it stops, give it a nip up and off you go if no more water then do'nt worry problem solved.

Still scary as you say looking down there with all that water sloshing around, in reality though always looks alot worse than it is, motors will keep going half submerged as long as it does'nt get up to the air intakes. Lucky bilge pumps did their job, ours fair flung the water out once they kicked in took probably no more than a minute to empty half a ton of water.

Think Volvo need to have a look at this as its not the first time I ve heard it happen. Think if you ask a spanner man who works on them they will tell you quite common.

Good job well done though, cool head always wins the day! /forums/images/graemlins/grin.gif

 

[byron]

Long shot, water coming up the sink unit's waste pipe ?

 

[Nickcf]

---------
Think Volvo need to have a look at this as its not the first time I ve heard it happen. Think if you ask a spanner man who works on them they will tell you quite common.
----------

Volvo don't supply the raw water strainers as the boat builder selects and fits these so they need to advise.

 

[Nautical]

D6 350 DPH as fitted in this case, you can see quite clearly at the front of the engine the raw water strainer, its the black round cylinder thingy front left just above the water pump....................Picture straight off Volvo tech spec sheet.

 

[Andrew_Fanner]

Impeller cover, check its tight, from annoying personal experience. If its a leak in the zorst side the water might smell, well smokey seems to cover it.

 

[Nickcf]

apologies, wasn't aware of this on these engines. Only ever seen the bulkhead fitting.

 

[D3B]

We've sort of been along this avenue before

why do some engines not have strainers?

Mine D3-160's dont have

but these D6 do

/forums/images/graemlins/confused.gif /forums/images/graemlins/confused.gif /forums/images/graemlins/confused.gif

 

[Nickcf]

I thought strainers were always separate from the engine because (ideally) you want the top of the strainer fixed at slightly above water level when afloat.

This enables the strainer to be cleaned without the need to turn off the seacock and is also slightly less prone to disastrous flooding if the strainer top isn't fixed properly. If the strainer is below the water line and you leave the boat without making the top watertight ......

Also potentially makes servicing of a routine part easier if remote from the engine (depending on where the boat builder puts it!).

Obviously once the height is determined by the engine location you lose this ability.

 

[No1_Moose]

Yes, unless the filters are handed it could be a major hassle to get to one engine. Is this something to do with the picture showing an outdrive model and water inlet being in the leg?

 

[hlb]

Re: Harumph! Restricted in ability to manoevre

My boats vertually uncontrolable on one engine. Mainly cos they limited the rudder movement when fitting the auto pilot. Cos the rams kept falling out the end. The only way is to drop one trim tab, that keeps it going straighter. Problem is though, if you slow down stop or go in reverse. The boat sleres round uncontrollably. Then cant get it facing in the right direction again. So yes severely restricted. No bow thruster of course.

 

[[2068]]

It just so happens that most outdrive boats end up with the water level at rest a bit below the bottom of the strainer so you can take the top off and clean the filter without sinking.

It's probably possible to design a really deep v-hull with a single engine where the top of the strainer is below the waterline, but I haven't seen any.

dv.

 

[Nautical]

With these engines in particular they sit quite tall and even on a deep V hull the tops of the engines are about 8" above water line so as you say you can open them up with any water ingress. The idea having everything attached to the engine is that it all comes as a complete unit incl drive so although more expensive to buy the installation time is half of that for shaft drive.

 

[Nautical]

Might be a problem if you had poor access, on ours you can just lift the tender garage panels and you can access everything real easy..............

 

[duncan]

absolutey - on an OD set up it all makes sense and the relationship between water. drive. engine, strainer are effectively preset

 

[powerskipper]

PS they are fun to helm too /forums/images/graemlins/grin.gif

 

[dalex]

[ QUOTE ]
sounds like you got to the problem and cured it but I've had a similar experience with deep sea seals on the prop shafts. Not tightened down no sign of water at low speed but a fair torrent when throttled up. Now looking at going back to good old gland packing! Just a thought.....Iain

[/ QUOTE ]

Engine alignment?? Prop shaft vibrating so moving faster than the deep seals can flex, perhaps?

 

[mercman]

speaking to the lads at SAL marine today there is a warranty replacement part on D6 water strainers phone up your local agent quote engine numbers. it is not a recall but they have had a few D6 units and the cap has been incorrctly made its worth a call.

 

[ShipsWoofy]

Re: Harumph! Restricted in ability to manoeuvre

ah the dreaded 500hp approach!

6 knots,

Should I show permanent restricted in ability to manoeuvre shapes.

6 knots

and having to use your rudders, well I'll be .... /forums/images/graemlins/cool.gif