edsparky
Does anyone know what the life expectancy of the rubber natural gas line is that came with my 4390-3 genset. Wondering if I need to plan for its replacement if it is doomed to fail after predetermined period of time or if it will last 15+ years.
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mastr
If you have a spare for it, it will last "forever". If you don't, it will fail at what ever time will cause the most difficulty.
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douglas123
This is true Master, except when the local critters decided to have it for dessert.
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edsparky
Cannot disagree with either of your logic!!!
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chucks bp
Next to the critters I would believe the biggest enemy to the flex line would be direct sunlight, this would depend on your generators location and amount of direct sun exposure.
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techntrek
The rubber line that came with mine is 6 1/2 years old, sits in direct sunlight half of each day and hasn't [I]visibly [/I]changed.
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genme
I put a piece of Armaflex over our flex line as a cover to keep sunlight off of it (not that it would get much sun anyway.) I made one long slit in the Armaflex from end to end (18" long or so) and positioned the Armaflex over the flex line so the slit is facing down for drainage. I didn't tape up the slit, and I didn't cover any connections.

I keep the cover from blowing off by using plastic electrical ties at each end. The tie is just tight enough to hold the Armaflex in place, but loose enough so I can slide the ties off to the side so I can remove the Armaflex to inspect the flex line.

I have no idea if this is a good practice or not, so I will not recommend doing this to anyone (I'm just writing what I did.) I only did this about two months ago.
Model 5875, Nexus controller, 999cc Engine, 20kW LP, 2011
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78buckshot
I had to replace one that was about seven years old, it did'nt look too bad but was leaking.
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