Westerly Falcon. No exhaust muffler or water lock.

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NealB

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It's blooming noisy, and it's flat calm today.

Can't put up with the din any more.

Any recommendations on brands or fitting tips, please?

I realise the water lock needs to be as low as possible, to reduce the risk of engine flooding.

Were these optional extras?

Edit: it's the original 1989 Volvo Penta 2003.
 
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Look in the Vetus catalogue which is on line and you will find very good guidance on fitting wet exhaust systems - dimensions , locations types of waterlocks etc. An NLP type would be the normal fitment then a straight run to a loop up as far as you can go before the exit. That will reduce noise and probably no need for a second muffler. You need to know the internal diameter of the exhaust hose to get the right size spigots. The inlet and outlet can be moved in two planes to make installation easy.
 
Tranona said:
Look in the Vetus catalogue which is on line and you will find very good guidance on fitting wet exhaust systems - dimensions , locations types of waterlocks etc. An NLP type would be the normal fitment then a straight run to a loop up as far as you can go before the exit. That will reduce noise and probably no need for a second muffler. You need to know the internal diameter of the exhaust hose to get the right size spigots. The inlet and outlet can be moved in two planes to make installation easy.
Click to expand...

+1
Page 79 et seq

http://pdf.nauticexpo.com/pdf/vetus/vetus-catalogue-2017-2018/21508-99645-_79.html

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NealB said:
I realise the water lock needs to be as low as possible, to reduce the risk of engine flooding.
Click to expand...

It doesn't need to be desperately low, just below the exhaust water injection point by a moderate amount. The bigger issue is that it must be able to contain sufficient water to preclude back-fulling. Vetus recommends half the exhuast volume to to the top of the gooseeck (or do you lack one of those, too?); this includes a generous safety margin.

Adjacent Vetus pages to the ones recommended will give you the full SP, including calculating volumes.

As said, a water trap will quite likely decrease volume to the extent a seperate silencer won't be required.
 
Thanks for the replies.

1 Yes, it's a wet exhaust

2 link to Get us page is great, thanks

3 yes, we have a biggish swan neck just before the exhaust skin fitting.

Luckily we're managing to sail down the Wallet, at the moment.
 
When I bought my Falcon the engineers survey found salt water ingress via exhaust. Took this into account in purchase price then replaced Volvo with Beta Engine and fitted Vetua water trap.

1500 engine hours of hard cruising and no further problems.

Engine is a lot quieter than before. Don't know if it's because of engine or water trap.
 
Tiercel said:
Engine is a lot quieter than before. Don't know if it's because of engine or water trap.
Click to expand...

Probably both! When I had a Centaur (1976) there was a small 2-cylinder Volvo MD7a (?) and a small 'muffler' that looked like two rubber cones stuck to each other, bases to base. When I scrapped the Volvo and fitted a Lombardini LDW903M I left the 'muffler' in place. I installed a Vetus water trap below the exhaust elbow AND I also added a Vetus swanneck in the cockpit locker. I remember having to having to cut an access 'hatch' in the back bulkhead of the 'coffin berth' to gain access because the aft 'locker' (Layout A) was... let's just say that my son was pre-teen at that time could fit in there if persuaded / cajoled / bribed!
It made world of difference! The modern cylindrical Vetus trap are of a larger volume and this helps tremendously.
 
NealB said:
It's blooming noisy, and it's flat calm today.

Can't put up with the din any more.

Any recommendations on brands or fitting tips, please?

I realise the water lock needs to be as low as possible, to reduce the risk of engine flooding.

Were these optional extras?

Edit: it's the original 1989 Volvo Penta 2003.
Click to expand...

Four months on.... what was your solution?

My Sealord has a straight through system with just the big gooseneck at the transom... it would appear to have been the norm at Westerly Yacht Construction.... along with no vented loops on the bog hoses and assorted other niceties.....

I was hoping to get away with just a Vetus muffler in the engineroom...what worked for you?

I didn't realise that it was noisy until I sailed ( motored?) on a friend's boat with the same -silenced - engine....an MD17D.....
 
Frank Holden said:
Four months on.... what was your solution?

My Sealord has a straight through system with just the big gooseneck at the transom... it would appear to have been the norm at Westerly Yacht Construction.... along with no vented loops on the bog hoses and assorted other niceties.....

I was hoping to get away with just a Vetus muffler in the engineroom...what worked for you?

I didn't realise that it was noisy until I sailed ( motored?) on a friend's boat with the same -silenced - engine....an MD17D.....
Click to expand...

As suggested earlier a water trap is the first thing to fit as it serves two purposes. You may well find a muffler is not then needed. Not common to fit on a yacht. If you do not have room to fit a pot type such as the NLP, you can fit an in line one either from Vetus or a Volvo type.
 
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