Yanmar 18hp Exhaust Hose - SailNet Community
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post #1 of 3 Old 08-25-2008 Thread Starter
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Yanmar 18hp Exhaust Hose

On Friday motoring out to spend an overnight in Newport we heard this 'squeak' at about a 2 sec interval. As most of you know, it is better not to let a strange noise go unattended. So I handed the helm to Mechele and went searching, and found that the yanmar exhaust hose was rubbing on the zip tie fitting, which is attached to the hull. The tie is at the point just before the hose travels upward then down to the thru-hull fitting. So I clip the tie, and of course, the rubbing on the fitting was wearing thru the hose.

Question, now unsecured from the zip tie, the hose was jerking quite a bit every time the water/exhaust cycled through, so much, I did not want to leave it unsecured. Is this normal?

So, for a quick remedy, I wrapped the hose with gorilla tape over the wear spot, and resecured it with a zip tie, tight enough that it did not move, given the limited supplies I had on board. The wear point is very shallow, and I do not think the hose needs to be replaced. Thoughts?

Question: Any suggestions what I can use to cover the hose to prevent the potential for further wear?
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post #2 of 3 Old 08-25-2008
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I would pull the hose and exaust elbow to see if there is any blockage. My yanmar tho a little bigger only has minor vibration in it. I would concider it a sign of a problem. Maybe the hose is to long and causes excess movement?
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post #3 of 3 Old 08-25-2008
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BS has a good point. The hose may be a bit too long, which would account for the movement and the chafing. Too short a hose can cause the same problem. The Gorilla Tape is a good stop-gap measure, but you should investigate a bit further. Maybe your engine has shifted or something else has occurred if the noise is new. A worn or broken engine mount could account for the extra vibration and movement. I am guessing the squeak and chafing is new.


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