Exhaust Hose Loop Banging - Northern Lights Generator

[BrontideRob]

When running my Northern Lights Generator on my 2000 Hunter 460, the exhaust loop in the aft starboard locker has begun to bang against the inside of the hull. It's a pretty good hit as I can hear it and feel it when I am sitting in the salon. I attempted to 'hold' the hose with my hand and I can 'slow down' the movement, but I can not arrest it. The knocking started a week or two ago after many years of smooth operation.

What would cause the such a strong force in the exhaust line? Yes, I know that it is the exhaust water that it is pushing. But why is it pushing with such strong pulses, rather than a smoother flow?

Thank you,
Rob

 

[SEMPERAVANTI41]

I would check the hose, thru hull and waterlift muffler for an obstruction. Perhaps the hose has collapsed?

 

[BrontideRob]

Thank you for the suggestion. I checked those all out. It all looks good.

So, I have addressed the symptoms. I have tie-wrapped the Generator Exhaust Hose loop to my Engine Exhaust Hose loop and, of course, the noise has gone away. But, I don't feel good about it, because I know that I've only addressed the symptoms and not the root cause of the 'thump'.

 

[woodster]

check you engine motor mounts one may be loose or broken

 

[Alan K]

I had a similar noise from my engine exhaust hose banging against a locker wall. The manufacturer-supplied tie wrap securing the hose had worn out. Found it in the bilge. A new tie wrap solved my problem.

 

[BrontideRob]

woodster - Thank you for the suggestions. All mounts checked and found to be secure.

 

[BrontideRob]

Alan K,
Thank you for the reply. So, may my addressing the symptom IS the solution to the problem, although I have not found, nor do I recall, there being a tie-wrap supplied with the original configuration. But it has addressed the noise (for now).
Thanks again.