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Old 03-04-2014, 08:06   #1
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How hot will muffler get?

I have a 90hp Graymarine 4 cylinder and am attaching an old, heavy duty 4" blower hose. The hose us not vinyl, but a oiled heavy canvas almost material.

Can I strap this directly to my exhaust? Water enters the exhaust at low mixing elbow right out of engine. The exhaust may have a jacket as it is about 5" copper or Monel.
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Old 03-04-2014, 08:42   #2
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Re: How hot will muffler get?

You have to know that even if that would work, surely no one would come on here and tell you to go for it.
Your talking about a bilge blower hose right? If so no way would I try that, it might work, but even if it did, it's a bad idea, surely it wouldn't work for long.
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Old 03-04-2014, 09:17   #3
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Re: How hot will muffler get?

If exhaust runs through it it needs to be exhaust hose, what exactly are you trying to do?
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Old 03-04-2014, 09:33   #4
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Re: How hot will muffler get?

The exhaust after the water injection is still pretty warm. I would only use hose made for exhaust. It's heavy duty, thick walled, black stuff that will stand up to the heat, gases, etc. This is not an area where you want to cut corners.

One thing you should be aware of. If the exhaust hose ruptures or even leaks a little it will fill the boat with poison gas. A rupture will pump water into the bilge much faster than you would ever imagine.
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Old 03-04-2014, 09:56   #5
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Re: How hot will muffler get?

I am not trying to run exhaust through the hose...I am only trying to mount my blower hose and I would like to attach it near or touching the exhaust line. I would use copper straps to secure the blower hose to the exhaust line.

Will the exhaust line get do warm that it might melt the old heavy duty blower vent if the two separate lines are near each other.

Funny. I should have been more specific. Thanks
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Old 03-04-2014, 10:08   #6
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Re: How hot will muffler get?

Just removing warm air from the engine room should be enough, attaching to the exhaust is not really needed . Anywhere in the engine room should pull in fresh air. The hole engine will radiate heat , the water exhaust will actually be cooler than the block.
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Old 03-04-2014, 17:24   #7
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Re: How hot will muffler get?

With something like this you need to be fail safe. If your exhaust for some reason overheated, the last thing you would need is a flammable blower hose strapped to it.

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Richard.
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