Webasto exchaust - where is the best place?

[webcraft]

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Should a Webasto exhaust always exit through the transom if possible, or is out the side OK? It's surely going to mean a long exhaust run if it does.

- W

 

[sailorman]

i have seen CC Westerly`s with the exhaust facing outboard in the cockpit combing & obviously well above the water line.
mine is in the transom

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Should a Webasto exhaust always exit through the transom if possible, or is out the side OK? It's surely going to mean a long exhaust run if it does.

- W

 

[Stork_III]

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Should a Webasto exhaust always exit through the transom if possible, or is out the side OK? It's surely going to mean a long exhaust run if it does.

- W

Mine is in the side, just below toerail.

 

[webcraft]

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How hot do they get?

- W

 

[Stork_III]

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How hot do they get?

- W

Mine, not too hot, but best not to fit you fender against it. Fit the proper exhaust silencer and you won't hear it either. It is the outlet in the blue stripe

 

[David2452]

In principle, the shorter the better provided there is a silencer, (Webasto specify a maximum of 2.5m for the latest ATs or 5m without silencer) over the side is fine but obviously bearing the waterline in mind, the transom is fine also despite the length, if you do have a long run then I would counsel the fitting of a condensate drain and in either case a lagging sock. If you go through the transom you should omit the silencer too. I have the dedicated marine installers manual which gives a lot of info if you would like a PDF just PM me.

 

[rivonia]

In principle, the shorter the better provided there is a silencer, (Webasto specify a maximum of 2.5m for the latest ATs or 5m without silencer) over the side is fine but obviously bearing the waterline in mind, the transom is fine also despite the length, if you do have a long run then I would counsel the fitting of a condensate drain and in either case a lagging sock. If you go through the transom you should omit the silencer too. I have the dedicated marine installers manual which gives a lot of info if you would like a PDF just PM me.

When you purchase the whole kit it comes with the lagging to cover the exhaust pipe.

 

[Tony Cross]

The Amel next to us has their's exiting halfway along the side about 6 inches down from their toerail. They use a thermostat (I assume) to switch the thing on and when it comes on at 3am the noise wakes us up. The owner is a sweet guy and he's done all he can to reduce the nuisance effect but there's not much he can really do (except put on more clothes!).

So if you want to stay friends with your neighbours go out the stern...

 

[ukmctc]

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Should a Webasto exhaust always exit through the transom if possible, or is out the side OK? It's surely going to mean a long exhaust run if it does.

- W

Best effect, no more than 1 metre from heater, no silencer and plenty thermal wrapping.
Doesn't make any difference whether its out the side or transom, thats down to the position of the heater.

 

[webcraft]

Best effect, no more than 1 metre from heater, no silencer and plenty thermal wrapping.
Doesn't make any difference whether its out the side or transom, thats down to the position of the heater.

Why no silencer?

- W

 

[steve6367]

The Amel next to us has their's exiting halfway along the side about 6 inches down from their toerail. They use a thermostat (I assume) to switch the thing on and when it comes on at 3am the noise wakes us up. The owner is a sweet guy and he's done all he can to reduce the nuisance effect but there's not much he can really do (except put on more clothes!).

So if you want to stay friends with your neighbours go out the stern...

One of these should solve it - http://www.ebay.co.uk/itm/Webasto-E...tEquipment_Accessories_SM&hash=item27cd784450

Makes the exhaust almost silent once throttled back from full.

The better the silencer the more it will promote build up of carbon in the combustion chamber - but that is easy to remove and I feel a responsability not to cause too much noise.

 

[webcraft]

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That silencer is for an Evo model. Mine is a Webasto Airtop 2000 ST.

It comes with a marine fitting kit and the relevant documents saying it is a marine kit, but has no silencer. There is just 2m of flexible exhaust and some kind of sock insulation. (See pic below).

Maybe it is not normal to fit one with this model?

Alternatively, I found this on Ebay from Turkey which looks as though it might be a worthwhile purchase at £30?

http://www.ebay.co.uk/itm/22MM-MARI...?pt=UK_Sound_Vision_Other&hash=item19d93e283f


- W

 

[Stork_III]

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That silencer is for an Evo model. Mine is a Webasto Airtop 2000 ST.

It comes with a marine fitting kit but has no silencer. Thew=re is just 2m of flexible exhaust and some kind of sock insulation. (See pic below).

Maybe it is not normal to fit one with this model?

- W

I think silencer is extra on all kits regardless of model. Really worth fitting one for your peace if not your neighbours. I can sit in the cockit 4 ft above the outlet and not hear it, have to open locker lid to check it is working, quiet woosh.

 

[pagoda]

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Should a Webasto exhaust always exit through the transom if possible, or is out the side OK? It's surely going to mean a long exhaust run if it does.

- W

Ours is aft, quite high up. I'd be careful about going out sideways... depending how often you put your toe rail in the water

More seriously, diesel condensate can be a problem, less so if your heater starts reliably each time. A long run could be more tricky.

The exhausts get very hot, so make sure the lagging covers all the pipe. If going through an aft locker - make sure NOTHING impinges on the exhaust. At best you will damage a fender or sheet, at worst you might manage to start a fire. I always look in there before using the heater to check the exhaust is entirely free of contact.

 

[webcraft]

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The 'tubular bandage' lagging doesn't look that impressive - is there thicker stuff I could fit that will guarantee no hot surfaces? Space is tight in our lockers.

Re. exiting through the side . . . I was wondering if, with suitable insulation, I could put the outlet in the Vega cockpit coaming. Time to contact the Vega association methinks . . .


- W

 

[Jabamusic]

Hi

I recently used this stuff..... http://www.ebay.co.uk/itm/HEAT-WRAP...arts_Vehicles_CarParts_SM&hash=item2eac6905fe


Certainly keeps the exhaust temp down to "just about touch-able" levels (at top end) after one wrap.

I recommend you use gloves when/if using it.

 

[Pinnacle]

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The 'tubular bandage' lagging doesn't look that impressive - is there thicker stuff I could fit that will guarantee no hot surfaces? Space is tight in our lockers.

Re. exiting through the side . . . I was wondering if, with suitable insulation, I could put the outlet in the Vega cockpit coaming. Time to contact the Vega association methinks . . .


- W

Try some of this stuff on top of the "tubular bandage" stuff. Should make it possible to hold the exhaust when running. I used 10m of insulation on the 2m exhaust pipe. Don't try and save a few pennies and buy less....you will regret it.

http://www.asap-supplies.com/search/glass+tape

 

[michael_w]

If you have th exhaust throught the topsides rather than the stern, you may draw fumes back below, or blow into the cockpit. I used to sail on a very expensive Finnish boat that had a side exhaust for the engine. Motor sailing on port tack was horrible.

 

[Stork_III]

If you have th exhaust throught the topsides rather than the stern, you may draw fumes back below, or blow into the cockpit. I used to sail on a very expensive Finnish boat that had a side exhaust for the engine. Motor sailing on port tack was horrible.

Thread is about heater exhaust not engine.

 

[David2452]

When you purchase the whole kit it comes with the lagging to cover the exhaust pipe.

It should come with a marine silencer too, (and a proper marine heater) but when I see "kit" on PBO I always assume it is not a proper kit and I am usually not in error.