D46

Nice rover ( ex Buick) V8 , well designed headers too ( all the same length) 😀. Calorifier wise a mixer on the tank will give you more hot water and is useful as far as not delivering red hot water to hot outlets , me I removed mine as it supply's hot to taps that are mixer taps anyway so I can reduce it there but that's personal choice . As for horizontal or vertical colorifiers it depends on the installation really but it's worth bearing in mind vertical ones from ASAP the fittings ie hose connections and PRV Valve + mixer valve are all extra , hot pot or sure just are exactly the same item really . Connection wise it's normally from a tapped connection from the back of the cylinder head ( I'll be amazed if there isn't one ) return is to immediately before the engine's water pump inlet as John discribed , that bit might need a suitable tee joint making up .

Ok I'll now be holding my hands up as to bring a little incorrect , the river launch ML yare is not the 6 yr old vessel patrolling the River yare , ML yare is at thurn apparently . A chance meeting with one of the yare rangers 10 mins ago cleared all of this up . My apologies to the forum and indeed to BA for my mistake .

Thanks for that Tom . On looking at the launch replacement program it transpires the the vessel came on line in 2013 hence 6 yrs old , now I can't see why it would need a replacement engine in that length of time given it does exactly what other boats do speed wise etc and it being a kabota a very much considered robust power plant . There must be countless folk who use their boats often now somewhat worryed regarding needing an engine swap . I fully understand though Vaughan's comment about rebuild costs of kabotas as genuine spares are extremely expensive against other makes .

Oh dear please accept my apologies for asking a question . Yes the reason may well be for preventive maintainace but I still think this launch hasn't done that many hrs , for one it's definitely not out every day nor has it been for a number of yrs and I'm fairly sure it was commissioned in around 2012 possibly a little later making it 6-7 yrs old . Yes there is some good news in the briefing but some of it poses questions one of which I've asked , I would have expected the season of good will to extend to forum members , maybe that manifests it's self in sarcasm these days .

Under vessel refits it's interesting to note the number of replacement engine's , now the subject of SOB has been done to death , but the launch yare is a lot less than 10 yrs old and has hardly had a difficult life or done a huge amount of hrs either. As far as I can remember the engine is a beta but it's certainly kabota engine of around 35 hp , the boat being built at brooms also included the ability to use electric drive which the rangers freely admitted didn't really work out well . The point is this engine should be relatively low hrs and in good health given its age , there are many hire craft with similar engine's that have done surely lots more hrs and not up for replacement . The vessel itself is in fine condition it's just a shame it's engine isn't !

I wasn't thinking of any one in particular it was general comment , but hey hands up anyone who's never forgotten anything I know I have .

Very likely it will be fine with the engine off as the batteries will settle to a voltage no too far of the limit of the electronics within the tv , fine till human nature kicks in as I can imagine someone fireing up the engine for a shower etc with the tv still on. The situation gets even worse with battery management systems as they charge when the engine is running at a higher voltage than normal alternator output , especially on the lead acid setting .

Really I don't think I've mis quoted or mis interrupted you at all , please explain where that has occurred . Because I didn't full agree with you doesn't mean I've done either of the thing you have accused me off.

Seriously cut the lead of a tv and ignore the 230 power supply at your peril , it's not designed to take the voltage kicked out when the alternator is running , the only way to do it is through a voltage stabiliser and when you have bought that you might just as well have bought a small inverter and onless it out of warranty kept that intact . Of cause inverter's have a place on boats otherwise they wouldn't be a popular upgrade . Regarding running 2 big alternators don't forget that will slow the engine down , it's far better to have a proper battery management system or alternator controller which does also slow the engine , but it does charge faster and to a higher capacity , in most cases fitting one is equivalent to adding an extra battery but with benifits such as extended battery life . It's not just broads boats that need good battery management it's all boats where ever they are be they private or hire . Incidentally who's ever seen a battery management system on a hire boat I certainly haven't .

Yes see that point but I really think is doing half a job , where as to include a few mains sockets make the boat more attractive to some as not all things come in a 12v format nor do people want to replicate items they already have . Now given how many hire boats you see plugged in these days it's pretty obvious creature comforts are high on quite a lot of hirers list. Me I prefer the choice which makes finding a mooring much less stressful and the boat can operate just as it does on mains power mimicked via the inverter .

Sorry but I fail to understand why a yard would equip a boat with shore power just for a battery charger , after all it needs exactly the same fitment to pass a BSC , and all it needs is a bit of cable and a few sockets , clearly that makes the boat more attractive to those that want mains power and a inflated hire cost no doubt . That said I've done no research on the matter as there are far more important issues but I have a certain amount of knowledge to fall back on .

I think you'll find the original post mentioned 67% have shore power , it didn't mention inverter's , probably because they aren't shore power . Fine challenging someone's figures but do some research and come up with something concrete to support that , ie ask a yard , if one person can do it so can others . I don't challenge others figures until I know myself as that's the fair way to do it . Inverter's have no part to play it the figures you can use one while mudweighted no where near and electric post .

Yes at cost to BA , I wonder who they pass that cost on to? , I'm fairly sure that the person requesting the cards doesn't pay it although I might be wrong . If out on the river it's perfectly possible to pick them up at no cost , I know of few people that have problems . Obviously shortages happen but it's pretty rare , clearly it's best to be prepared and have a stock to fall back on . The reliance on electric posts isn't the answer , it's not long ago since the entire system was upgraded and the weren't available for a lengthy period of time , and it's the same in winter when higher than normal tides take the posts out .

Don't forget that the river rangers also Carry a supply of cards . Both the new inn and brooms have run out in the past in my experience but generally it's fine . The BA on their web site Carry's a full list of outlets that do cards as far as I'm aware .

This could be of use when fitting accumulator and expansion tanks especially regarding pressure and sizing etc . Accumulator and Expansion Tank Instructions ZPWL4 doc595.pdf

Surely that's an tank operating as an accumulator tank not an expansion tank as it' Tee's off the cold from the water pump ?

I really don't see the need for the expansion vessel really , after all the tank has a pressure realise valve , that in it's self is of a lower value thant the tanks are tested to . An accumulator tank however on the cold side really does smooth out the flow and stop's the water pump cycling , pressure should be 2-3 psi less than the pump pressure which different from pump to pump . 1 bar by the way is 14.5 psi .

Very sound thinking .

Mmm like no definitely not I wouldn't trust it it's a gas system after all . Thing is it's not rocket science to do gas pipe work on r read the BSS guidelines regarding that installation , BUT for heaven's sake get it checked before using it , sure you can use a bubble tester but a manometer will show up just the same , the good thing about the bubble tester is it's there in place to check in those 4 yrs between the BSC man putting his manometer on the system .

Copper tanks have always been a good choice on boats for many years , that said I can't see any reason not to chose a S/S one , the thermostic link is a different issue , do you really need it ? If you have mixer taps then probably not as there's no need to reduce the hot supply at the colirifier when it can easily be done at the taps . Gas pipe wise if you have Tee's that are capped off with proper fittings it will no doubt pass s BSS , but it would be far better to replace the entire line working to the BSS guidelines if that indeed is a task that can be reasonably easily accomplished . If doing the work yourself then before using it it's very prudent to get a gas safe engineer to pup a manometer on the system to test for pressure drop ie leaks .

The answer is a fair bit higher than that , the whole of both carparks flood on occasions .

Spot on silent block bobbins will cure a resonance issue n pretty easy to fit too , that said they have already got isolation rubbers fitted so it shouldn't resonate . Incidentally the Johnson pump is a 5 diaphragm pump hence the large chamber and should ideally be run in conjunction with an accumulator tank of the correct size and pressurised 2-3 psi less than the pump pressure . Any water pump must never be mounted with the motor facing down in a vertical format as any internal leak will get back into the motor and bearings , sideways is fine as is any oriantation on a flat surface . A simple ball valve introduce on the inlet side will combat the issue being able to isolate the water supply and very useful to be able to turn it off when leaving the boat for extending periods as it removes the possibility water running if a pressure realise valve , tap washer or pipe fails aft of the pump , if it's taken care of with a pump turn of switch fitted to the boat already that also removes that risk .

TBH I can't see how it can be vessels builders at fault , sir BA did all they could as in seeking the advice of the nav committee and employing a qualified person but unless the builders mislead BA in some way it's nothing to do with them . I'm not in anyway blaming BA , they did all that could be expected of them but something went badly wrong as for her actual time of patrolling hrs SOB has to be the very least and most expensive ( in maintaining and down time ) of any launch in memory and I'd still now it's being re engined again a drain on the navigation budget . Hopefully this new engine will be more suited to it's role , but I do believe that BA got very much carried away with the SOB hype when she was first introduced , if I remember correctly they did mention that she was coastal as well as inland . I've still misgivings about her being placed for sale as part of the launch replacement program as she was only in service 6 yrs , that sounds a small amount of time considering the age of the other launch's . Incidentally I have no connection at all with Goodchilds but I don't like to see reputations potentially damaged by what has clearly nothing to do with them on less as stated they mislead BA and it's qualified person .

To be honest I really don't think this has an awful lot to do with Goodchilds as the builders of the vessel , surely it was built to a specification deamed sutable buy the people who originally ordered it , then for an unknown reason didn't complete the purchase . Then BA step in and bought it knowing of it's specification etc , it should and would have been completed obvious to anyone who knows about big engine's running at slow speeds that the boat wasn't that sutable to the role BA expected of it . How can that be any fault of the builders of the vessel ?