I thought I would run the engine yesterday for the first time in a couple of months, a few minutes later the overheating alarm went off.
There was water at the outlet from the water strainer, so I took the pump off then it's back. When the shaft was turned the impeller didn’t, the bonding between the rubber impeller and the metal centre had failed and it was easy to separate the two.
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The water pump looking from aft. |
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Visually in good condition except its now in two pieces. |
I change impellers annually in the spring with Yanmar branded ones so it has one seasons use. I suppose I should be grateful that it didn’t fail
when I was rushing back to the Hamble from Hope Cove in August for a family emergency; I carry multiple spares and could have fixed it in an hour but it would have been quite stressful until I found the fault and dangerous if it had failed going through the needles channel with little wind.
The assembly is getting a bit tatty where bolts bear on it and as I want to replace some of the pipe work, (including the bit shown above) and check the engine anodes I am leaving the engine drained of water for a while and have the unit at home for the clean up and repaint.
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After the repaint. |