petem
Well-Known Member
No, keep it rolling , I'm really enjoying seeing who has the best bilge pump float fixing screws ! It's much more interesting than the original topic.....
You can't beat a bit of float switch securing screw willy waving!
Can you tell off the top of your head...
- Thread starter MapisM
- Start date
You can't beat a bit of float switch securing screw willy waving!
jfm
Well-Known Member
Oops I didn't realise it was your boat. Pete posted the pic. Ah well. Top prize goes to the shower drain pipe that passes through a limber hole (urgh!) then goes under the sump box and uphill to the point where it drains. Not life threatening of course!Remember it’s a 2001 and stuff been probably replaced along the way .
What specifically can you see to tag the word “ awful “ on .
Just curious.
The pre 2004 boats do seem to stand the test of time well and are getting sought after these days buy those that know .
Do l need to enter my nuclear bunker ready for the battering
Portofino
Well-Known Member
Oops I didn't realise it was your boat. Pete posted the pic. Ah well. Top prize goes to the shower drain pipe that passes through a limber hole (urgh!) then goes under the sump box and uphill to the point where it drains. Not life threatening of course!
Nope it’s the Air Con air handlers under the fwd bunk retrofitted in 2014 , condensation drain .
In the other pic of the compartment fwd you can see the retro insulated water pipes too in that pic too
Can,t see the point of routing it any other way tbh .
Clue I guess is the colour new ish compared to the yellow other pipes .
Shower drops down from the LHS into the sump box and is pumped out to a manifold- eventually exists from one of the 3 holes below ( cocked ) the WL at the transom.
The yellow pipe RHS is heading from the bilge pump to the manifold on the stb side
There are no above the WL exists on the lateral aspects of the boat - every exist is either stern or underwater .
Most other builders just drill a hole in the hull and place a suitable fitting Like a sink or shower or cockpit drain etc .
So some one had a bit of a think about exists
Not wanting to drop a “ Cathy “ moment into this thread but I suspect if you had the time and inclination to read the previous posts and view pics then a less seemingly it would appear
Quote Cathy*
[If you'd bothered to read my original question ———//——- Do you spend your days picking out random bits of posts you can disagree with? ]
Read more at http://www.ybw.com/forums/showthrea...nsurance-do-we-need/page3#wQMMBJGtGyAqT5vD.99
—-
I realise you are a busy fellow and the adversarial mind set to be an asset——- sometimes
Any other Qs fire away and I will try to answer .
Repost of ^^^ pic set for ease
https://imgur.com/a/MYpfh
Yellow stain is from I dropped the bow thruster oil bottle attempt to top up then tried to wash it ( loadsa soap up )
Anyhow that bilge pump got a work out
Last edited:
Portofino
Well-Known Member
No, keep it rolling , I'm really enjoying seeing who has the best bilge pump float fixing screws ! It's much more interesting than the original topic.....
There no moss on you Andy - you can sit at the front of the class
BartW
Well-Known Member
petem
Well-Known Member
here is mine,
sorry for some of the wording, need correction, the doc is from 2013.
Jfm is going to have to post his now!
petem
Well-Known Member
My dad always measures wealth by the number of toilets a man owns (7.33 for me). Perhaps the same goes for Sea Cocks!?
MapisM
Well-Known Member
So, I guess that includes hydr cooling, w/maker and aft a/c outlets, since you didn't mention them in you list, right?
TBH I don't see why bothering to build sea chests and use them just for discharge, but they must have had a reason, surely.
Regardless, what about shaft seals inlets, aren't they water cooled?
And don't you have a sea water pump for anchor chain wash?
Just curious!
PS: I just noticed that also BartW drawing doesn't include shaft seals inlets.
B, have you possibly got the good old stuffing boxes?
Last edited:
Portofino
Well-Known Member
My shaft seal water lub pipes come off the gearbox oil cooler ,which comes ultimately from the main engine “in s”
Looks like a tiny 10 mm pipe .
Looks like a tiny 10 mm pipe .
MapisM
Well-Known Member
By "lub" pipes you actually mean "cooling", I reckon. I mean, the fact that they come from the g/box heat exchanger is incidental and has nothing to see with the g/box oil, I suppose?
Anyway, yep, I understand that picking raw water from the engine mains inlets can be an alternative.
Which type of shaft seals have you got?
vas
Well-Known Member
same here P.,
old school stuffing boxes, picking up a ~12mm hose from the seawater circuit just before entering the exhaust elbow. I thought this is common practice on shaft driven boats, maybe I'm wrong.
cheers
V.
old school stuffing boxes, picking up a ~12mm hose from the seawater circuit just before entering the exhaust elbow. I thought this is common practice on shaft driven boats, maybe I'm wrong.
cheers
V.
MapisM
Well-Known Member
BartW
Well-Known Member
the good old stuffing boxes are still there and no plans for changing that,
and they have each a seacock for seawater cooling.
These are missing on that drawing, needs an update,
but I believe they are included in my top of head count (16) ;-)
Portofino
Well-Known Member
Or maybe not!
What I'm sure of is that on top of mine, I've seen several other boats with modern(ish) shaft seals, of different brands, cooled by their own seawater pickup.
That's why I asked PF (and now also to you!) about the brand of his seals.
A pair of these - tbo this is my 1st shaft drive boat so it’s been a steep learning curve
They don,t leak or drip —- yet ! Bumf talks of 40,000 hrs and 6 yearly bellows changes
There’s a big bilge pump less than 30 cm from them with an alarm .
Water comes from a nipple on the oil cooler jackets nearby , suppose as you rev up the main inpeller spins up and inceases the water pressure .Faster you go = more water down the seal to cool it .
We have a coolant water pressure parameter with the MMDS .
Buy I suspect lack of cooling in the face seal is lowdown on the damage list if there’s a pump / impeller / water restriction issue bombing along at 80 % load
http://www.shaftseal.com/pss-type-b-seal.html
D
Deleted User YDKXO
Guest
Or maybe not!
What I'm sure of is that on top of mine, I've seen several other boats with modern(ish) shaft seals, of different brands, cooled by their own seawater pickup.
That's why I asked PF (and now also to you!) about the brand of his seals.
This is the stuff I've got, fwiw.
FWIW I've got PSS seals which are cooled by a pipe coming off the gearbox cooling circuit. I dont see the point of having a separate seawater pick up for the shaft seal coolant because the volume required is small and there's nothing much to go wrong in the gearbox coolant circuit
jfm
Well-Known Member
Yes, re outlets.
I agree that outlet seachests are no big deal but they help with aesthetics and noise. Pretty common on many brands e.g. My Pershing neighbour has a few
Shaft seals are cooled from engine circuit. I didnt spec anchor wash because you don't need it with polished ss chain. If I did it would be freshwater.
jfm
Well-Known Member
Not sure I see yr point. Whatever the source of the water in that pipe, it isn't going to go uphill, and routing thru a limber hole is messy. No matter; it will work of course. Also the absence of lateral discharges helps with aesthetics but a Pershing style lateral discharge would be better- you keep the sleek looks but get the technical benefit of short pipe runs.
Portofino
Well-Known Member
It’s a retro fit not the original builders work that’s the point .
I guess it saves drilling holes in that vertical pannal with the limber hole in - aside any residual water ( small amount ) I suspect will run back getting on the plane or running ,slightly bow high ,or rising up a wave in a swell .
No worries , from me and here’s why - - —-
We have two internal lateral metal pipes or I called them “ manifold s” as I don,t know the terminology.
It’s these that are cocked out at the stern below the WL .
They are high @ the front and angle down towards the stern .,like a drain pipe on a house but more horizontal ish. The dia increases as they run back / downhill to the stern .
Anything ( drains ) that’s connected has a short pipe run into them .
Lower stuff like that shower sump and bilge pump -near the bow area - water is pumped up
I like that idea as opposed to just drilling a hole in the hull nearest the thing you want to drain .
Remember it’s got a big cockpit ( relative to other boats ) and easily removable ER covers / cockpit soles .
There a lot of little drains for the gap s between these pannal s ( not to be confused with the main scuppers ) these too connect to the “ manifold “ thingys on the lateral aspect of the ER .These drains are gravity fed .
Just picking up on your point of standing water in pipes ,ie water “ having to run uphill “
How do bilge pumps generally work in that respect ?Not just my boat but everybody’s boat ! Inc yours and PeteM,s
Thinking aloud in my mind the pick up pump should be as low as possible cos that’s where gravity takes the water - this entails a below waterline placement scenario.
Then the exit is above the WL ? So water is pumped up hill to get out either through a hole drilled in the hull near or into something else like this internal “ manifold “ thingbob?
With no none return valve when the pump stops ,the pipes vol runs back - surely ?
With any form of none return valve the pipes vol stays in the pipe - yes ?
I think you are worrying too much about a drop un pressurised AC condensate in a 12 mm pipe , which sits there’s until planning .
In the bigger scheme
Reflect for a moment on the hydraulic hoses , fuel lines , engine cooling plumbing , engine oil plumbing , AC cooling plumbing , water maker plumbing and don,t forget the geny(s) add the domestic water and toss in the black tank arrangement .
In my book that little retro fitted AC drain is waaaay down the worrie list of - what if ————
sorabain
Well-Known Member
I'll bite. What's the 0.33? A baby potty? A bucket?
vas
Well-Known Member
had the same thought, obviously the Targa has one toilet, and bearing in mind Pete shares it with another two, means he "owns" .33 of it, I guess they've split it up and one has the washbasin, one the bog and the third one the shower. Now Pete has to tell us which of the three is actually his!
V.
PS. for the record I'm at 5+2+1+.5+.5=9 (two flats shared with my brother)
Other threads that may be of interest
