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Exhaust lagging

I would like to ask if it would be a good idea for me to lag the hospital silencer in my engine bay? If so are there alternatives to the lagging that is mostly sold for exhausts as it appears to be quite narrow and would take a lot and is expensive. I was wondering about domestic regular hot water lagging?

Asked by: Raymond Fowler  | 6.41pm, Monday 11 December

WW says:

Hospital silencers usually have internal lagging around the inner silencer to give extra noise dampening. This means that they do not get as hot as conventional silencers; however the ends do not have lagging and can get hot. The BSS requirement for exhausts to be lagged has now been changed to a check for heat damage from the exhaust system on private boats.
Therefore it is only parts of the exhaust that could be touched inadvertently, when using the weed hatch for instance, or that could cause damage need lagging.
The insulating covers for hot water cylinders will not stand the heat of a silencer; the outer plastic will melt. Exhaust lagging bandage is woven glass fibre which can withstand the high temperatures. If you want to lag your hospital silencer try using a fire blanket which will be easier than the bandage and probably cheaper; loops of wire will hold it in position.

Rupert Smedley  | 10.09AM, Tuesday 12 December

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