Why would a bellows fail?

randybartlett

Member
Joined
Jun 20, 2006
RO Number
21887
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24
On my 19' i/o, there's a hole in the bellows on my VolvoPenta sterndrive. This bellows is a flexible rubber boot around the universal joint/driveshaft.

The hole is 2" long, shaped like a J. It starts as a sliver and turns into a flap. The hole let my boat sink, luckily I was in shallow water so only 300-500 gallons of water came onboard.

Why would this fail? While there are some openings, the bellows seem to be in a pretty protected place.

Is it typical for them to fail suddenly?

Thanks
Randy
 
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