Waterlock questions

[Boo2]

Hi,

My engineer has finally (after 16 months !) got the new engine and fuel tank placed inside Sunrunner for a look-see before nailing it all down, see this pic :

As you can see, there's not much room behind the engine and in front of the tank so I was wondering about trying to obtain a split waterlock that can straddle the prop shaft. Leaving aside the issue of access to the stern gland for the moment, does anyone know where such a split waterlock can be obtained ? An alternative would be to have one specially made up in stainless, anyone know where this can be done at a reasonable price ?

My default position (the engineer's actually) is to put the waterlock behind the tank, but this will result in it being quite a bit higher than if it could be mounted directly behind the engine so I am prepared to take some trouble to do that if at all possible.

Finally, does anyone here have any experience of the type of waterlock that vents the water directly below the hull into the water, leaving the exhaust gasses to exit in the normal way via the transom ? This might be one way to alleviate the problem of the increased height if I have to situate it behind the tank ? Or am I barkign up the wrong tree here ?

Many thanks,

Boo2

 

[Tranona]

The critical thing is to get minimum of 30cm hose down to the waterlock from the exhaust outlet. Looks to me like you have enough room there for a Vetus NLP between the gearbox and the engine bed. The advantage of that waterlock is the range of different positions for both inlet and outlet spigots. am I right in thinking the exhaust is on the other side of the engine? You may be able to loop the exhaust hose over the top of the gearbox.

 

[macd]

+1 with Tranona. The NLP is ideal where space is at a premium. It's available in two sizes (5 and 10litre if memory serves), with a variety of stub diameters.

See here: https://www.google.co.uk/search?q=v...0-mm-hose-connections-4-5-litres.html;500;500

 

[itchenseadog]

Looks like you are going to have to have some heavily modified engine feet to position the flex mount correctly on the bed.

 

[sailorman]

http://www.halyard.eu.com/pleasurecraft/productdetails?product=41&category=Exhaust Systems

are you going for grey bilge paint again

 

[Boo2]

http://www.halyard.eu.com/pleasurecraft/productdetails?product=41&category=Exhaust Systems

Thanks for the pointer. Having seen it I think I can rule them out as too complicated and not really any help in terms of finding the space to fit a waterlock.

are you going for grey bilge paint again

Nope, as an aid to future archaeologists I've bought white Danboline this time

Boo2

 

[Boo2]

The critical thing is to get minimum of 30cm hose down to the waterlock from the exhaust outlet. Looks to me like you have enough room there for a Vetus NLP between the gearbox and the engine bed. The advantage of that waterlock is the range of different positions for both inlet and outlet spigots. am I right in thinking the exhaust is on the other side of the engine? You may be able to loop the exhaust hose over the top of the gearbox.

+1 with Tranona. The NLP is ideal where space is at a premium. It's available in two sizes (5 and 10litre if memory serves), with a variety of stub diameters.

Yes, the NLP 50S looks like the job, according to the spec sheet the Nanni N.38 needs at least 8l capacity in the waterlock so that means the larger of the two 50mm sizes is required. Still don't know whether it will fit though as the glasswork on the new P bracket and tank mount still needs to be done and the engine can't be bolted down until it's done.

I will make a cardboard model and test fit before buying, I think.

Boo2

 

[Boo2]

Looks like you are going to have to have some heavily modified engine feet to position the flex mount correctly on the bed.

Yes, the engineer is talking about putting some plate on top of the beds, or else angle's inside it to mount the new engine on. The old engine was quite a bit bigger, and someone had had to grind out part of a crosswise web and the engine mount to get the gearbox in, even then it was just touching the floor. Fortunately the new Kubota block is a fair bit smaller so we won't have to do anything nasty like that to get it in...

The spare space at the sides is going on soundproofing material mounted on the inside of the engine casing.

Boo2

 

[sailorman]

Yes, the NLP 50S looks like the job, according to the spec sheet the Nanni N.38 needs at least 8l capacity in the waterlock so that means the larger of the two 50mm sizes is required. Still don't know whether it will fit though as the glasswork on the new P bracket and tank mount still needs to be done and the engine can't be bolted down until it's done.

I will make a cardboard model and test fit before buying, I think.

Boo2

I have the NLP 50 on my Nanni 4150