prv
Well-Known Member
If mine was like that I think I'd have seriously considered fitting a new seacock for it and blanking off the saildrive inlet.
Pete
Bavaria seacocks
- Thread starter brians
- Start date
If mine was like that I think I'd have seriously considered fitting a new seacock for it and blanking off the saildrive inlet.
Pete
pvb
Well-Known Member
It's a standard Volvo Penta feature with saildrives. I suppose it depends how often you want to turn off the engine cooling water. I only turn mine off when there's a possibility of extremely low temperatures.
prv
Well-Known Member
What, fitting them where you can't reach them?
I know what the intake is like, we have one, but it's easily reachable on our boat. The accessibility or otherwise is a feature of the boat, not the drive.
Pete
Ripster
Well-Known Member
Mine is a 2011 farr design 36 and ALL the fittings, valves and tails out of the factory were brass - I checked when I got them all off with code markings. Now all replaced with dzr. After 3 years in the water, there was pinking on the outer surfaces in the form of spots and marks, but cutting a cross section showed no signs of any deep corrosion. I changed them for peace of mind for the future.
prv
Well-Known Member
We also had visible pinkness on Ariam's skin fittings, though no serious structural deterioration yet. We replaced them all because we were about to get the boat coppercoated, and assumed they would paint the outer flanges which we'd therefore want to avoid replacing later. In the event though they masked off the skin fittings and then antifouled them afterwards
Pete
fireball
Well-Known Member
Thought about it for about 10 minutes and decided not to worry ...
The inlet is on the port side of the saildrive - only access to the engine bay is from the front or starboard side ... the side one being a PITA to get to, although once there access was reasonable. It just needed an access hatch in the port side - which would've been in the heads - can't quite see why they didn't do that.
JumbleDuck
Well-Known Member
I thought it was only the cheapskate manufacturers like Hallberg-Rassy who used brass.
vyv_cox
Well-Known Member
I suspect that if the vessel complies with the RCD requirements it would satisfy any coding specification, as there is currently no other that I am aware of. News is that there is an ISO on the way that will raise the seacock requirements but that's all I know at present.
So far as bonding is required I don't think anything is specified here, although ABYC may ask for it. As the other thread showed there is fundamental disagreement between people who know quite a bit about the subject.
RichardS
N/A
What, fitting them where you can't reach them?
I know what the intake is like, we have one, but it's easily reachable on our boat. The accessibility or otherwise is a feature of the boat, not the drive.
Pete
The Yanmar raw water cocks on my boat (x2) had never been closed during the entire 6 years that the boat had been on charter. The same for all the other 50-odd boats in the fleet. The problem, of course, is that when I tried to close the valves for the first time they were so infested with barnacles etc that they were completely jammed. It took me from lunchtime on day 1 to nightfall on the day 2 to free both valves by easing them open and shut a fraction of a turn at a time with a lever.
Those 10 complete turns from fully open to fully closed seemed like an eternity and my hands were cut to pieces and covered with plasters by the end!
I'll never understand why Yanmar use a gate valve rather than a ball valve!
Richard
ghostlymoron
Well-Known Member
Dump the gate valves ASAP and fit ball valves. You know it makes sense.
The Yanmar raw water cocks on my boat (x2) had never been closed during the entire 6 years that the boat had been on charter. The same for all the other 50-odd boats in the fleet. The problem, of course, is that when I tried to close the valves for the first time they were so infested with barnacles etc that they were completely jammed. It took me from lunchtime on day 1 to nightfall on the day 2 to free both valves by easing them open and shut a fraction of a turn at a time with a lever.
Those 10 complete turns from fully open to fully closed seemed like an eternity and my hands were cut to pieces and covered with plasters by the end!
I'll never understand why Yanmar use a gate valve rather than a ball valve!
Richard
prv
Well-Known Member
Possibly wanting to keep the surface unbroken for shower-proofing?
Otherwise just saving a few quid
Pete
charles_reed
Well-Known Member
Three people in the marina I was in had their raw-water seacocks dezincify. Only one of those was a Bavaria though, and all had more-than-7-year-old seacocks.
Of course most boats have a saildrive leg so the problem doesn't exist for them. Like you I've never heard of other than raw-water inlets give trouble - I did have the tail on my toilet exit dezincfy - that was 20 years old.
charles_reed
Well-Known Member
The Yanmar raw water cocks on my boat (x2) had never been closed during the entire 6 years that the boat had been on charter. The same for all the other 50-odd boats in the fleet. The problem, of course, is that when I tried to close the valves for the first time they were so infested with barnacles etc that they were completely jammed. It took me from lunchtime on day 1 to nightfall on the day 2 to free both valves by easing them open and shut a fraction of a turn at a time with a lever.
Those 10 complete turns from fully open to fully closed seemed like an eternity and my hands were cut to pieces and covered with plasters by the end!
I'll never understand why Yanmar use a gate valve rather than a ball valve!
Richard
Not Yanmar but the boatbuilder - agree totally gate-valves have no place in any marine application. In fact they're a menace in household plumbing and I've gradually replaced all mine with ball-valves.
JumbleDuck
Well-Known Member
I can't see any reason why a gate valve should be intrinsically worse than a ball valve - surely it depends on the materials used? My last boat had a gate valve on the sink drain. It was fitted by Westerly in 1976 and was still working perfectly when I sold her, three years ago.
macd
Well-Known Member
The usual reasons given (materials aside) are that it's more laborious to close, not easy to tell at a glance whether it's closed or not, and susceptible to trapping debris which prevents complete closure.
sailorman
Well-Known Member
Gate valves normally have a brass spindle, this is the weak point that dezincifies faster than the body
macd
Well-Known Member
JumbleDuck specifically excepted metallurgy from his argument, so even if some spindles were made of cheese straws, it would be neither here nor there.
sailorman
Well-Known Member
I was comparing the difference between ball valves to gate valves
macd
Well-Known Member
Which you were entirely at liberty to do. But why quote me with no regard for context?
sailorman
Well-Known Member
quoting Jumbleduck
Originally Posted by JumbleDuck 
I can't see any reason why a gate valve should be intrinsically worse than a ball valve - surely it depends on the materials used?
I can't see any reason why a gate valve should be intrinsically worse than a ball valve - surely it depends on the materials used?