Reinforced rubber exhaust hose

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Honeyman

Honeyman

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Jan 2, 2005
779
Hunter 35.5 Legend Lake Travis-Austin,TX
I seem to have sprung a leak where the rubber exhaust hose connects to the exhaust elbow coming off the heat exchanger on my 3GM30 Yanmar that is in a '94 Hunter 35.5. Does NOT look like a "fun" fix. Advice welcome...will the hose size and mfg. be printed on it? Anyone know what it is?
 
Don S/V ILLusion

Don S/V ILLusion

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Sep 25, 2008
7,695
Alden 50 Sarasota, Florida
Nothing unique about it. It's reinforced exhaust hose (or should be...) available at any marine store or good chandlery. Equivalent to some auto pressure hoses at which you might find a better price.
 
sailaway78

sailaway78

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May 11, 2005
3,431
Seidelman S37 Slidell, La.
Ace

My local Ace Hardware stocks reinforced, marine exhaust hose at about half the price of WM or other strictly boat places. It's stiff and hard to deal with, but determination will see you through.
 
Snotter

Snotter

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Sep 25, 2008
615
Morgan 415 Out Island Rogersville, AL
Don S/V ILLusion said:
Nothing unique about it. It's reinforced exhaust hose (or should be...) available at any marine store or good chandlery. Equivalent to some auto pressure hoses at which you might find a better price.
Click to expand
It shouldn't be equivalent to auto pressure hose. It will be reinforced with stainless steel and be a heck of a lot more thicker and heavier.
 
Alex Dare

Alex Dare

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Apr 15, 2009
302
C&C 30 Annapolis
hose

Ditto...not the same as any hose you're likely to find under the hood of a car. Marine grade exhaust hose and reinforced radiator hose are not the same thing. While you're at it, might be a good time to change out the exhaust elbow if it looks suspect.
 
Maine Sail

Maine Sail

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Feb 6, 1998
11,760
Canadian Sailcraft 36T Casco Bay, ME
You'll want to look for an SAE J2006-R2 compliant hose preferably wire reinforced. These are mandrel lamianted hoses and quite expensive. The two large makers are Shields and Trident.
 
druid

druid

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Apr 22, 2009
837
Ontario 32 Pender Harbour
- Don't scrimp on your exhaust hose!
- Don't scrimp on your head/holding tank hose!
- Don't scrimp on your fuel lines!

The marine exhaust hose is expensive for a reason - get The Right Stuff.

The main problem you will find is getting the old hose off - I assume this hose goes from the mixing elbow to an aqua-lift muffler of some sort. If it does, it's not that long and probably fairly easy to get to. If it goes all the way to the stern exit, you're in for some struggling in tight places!

If the hose is damaged, now might also be a good time to have a look at the elbow itself - might be time to replace that while you're at it.

druid
 
D

Deadline

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Jun 7, 2007
515
Hunter 320 Williamsburg
As to getting the hose off...

1. Apply a hairdryer to loosen up the fitting.
2. Spray PB Blaster around the edge to get it to seep in.
3. Use a big wrench to pry it loose.
4. Do not reverse 1 and 2, or you might catch fire.
5. Failing that, remove elbow and manifold and do at workbench.
 
Honeyman

Honeyman

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Jan 2, 2005
779
Hunter 35.5 Legend Lake Travis-Austin,TX
What are my chances that the elbow itself is corroded/rusted through just above the joint? I'm very familiar with how tough and hard this hose is to work with and I just don't see it splitting. If its the elbow and its not coked up, isn't there an epoxy that will fix small holes and withstand the heat, maybe with some exhaust pipe "wrap" as used on hot rods?
 
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