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Yanmar saildrive diaphram


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#11 Addem

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Posted 28 December 2019 - 06:36 AM

We replaced both. Wasn’t as hard as we were told to expect. And the old seal was quite stiff and overdue.

As to the securing rings on the second seal being weak; I couldn’t agree more. We had a crack in the exhaust elbow a year ago on a long overnight trip which filled the boat with water to the floorboards before we knew about it. Consequently, with the cracked secondary seal, the cavity between the two was full of seawater and the rings you mention we’re so corroded as to be virtually non existent. (Also establishing the water alarm is NBG too. )
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#12 Island Time

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Posted 28 December 2019 - 09:02 AM

You should have a float switch triggered alarm in the engine room!
The between seal alarms often dont work in my experience.
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#13 Addem

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Posted 02 January 2020 - 04:53 AM

Thanks IT. Good idea. Never thought of that.
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#14 Island Time

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Posted 02 January 2020 - 07:50 AM

Just remember only an alarm, not an auto bilge pump - you dont want it auto pumping oily water into the marina, for example.
I had an issue some years back where in a flat calm we motored for quite a few hours, then Jo noticed water coming out under the engine compartment front cover. There was 300mm of water in the engine compartment due to a failed raw water pump seal. Since then, I've always had a water sensor and alarm. Checking every watch change is not enough....
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#15 Addem

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Posted 03 January 2020 - 04:41 PM

Agreed. We were fortunate that we had someone sleeping on the floor who woke thinking he’d wet the bed.
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#16 alibaba

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Posted 09 January 2020 - 07:29 AM

I've just put a water alarm into my engine compartment with a saildrive. It's a battery operated one- battery last for two years so I'll replace every year to make sure.

They're cheap enough, just look up "flood alert' on the internet - cost me $14.

I  have it on a swivel, so I just turn it down to just above the floor when I turn on the seacock. Worth a try I thought


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#17 Addem

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Posted 09 January 2020 - 11:07 AM

Thanks Ali. I’ll do that
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#18 alibaba

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Posted 09 January 2020 - 11:11 AM

Fyi the company was Nicebuys
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#19 Island Time

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Posted 09 January 2020 - 12:45 PM

Personally I'd rather have it powered by the boat....


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