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My yacht club has two launches with Yanmar 75 horse engines. The boats were purchased new about 3 years ago. This is the same engine that I have in my boat. When servicing one of the launches this spring, someone improperly installed an oil filter. I’m not sure how you do this wrong. Perhaps they didn’t remove the gasket from the old filter before installing the new one. The filter leaked all the engine oil into the bilge and then seized. The operator didn’t hear the engine alarm. It is suspected that instrument panel alarm override switch was set, silencing the alarm. The yanmar alarm is not very loud. Its possible that the operator didn’t hear the alarm over the engine noise even if the switch was not set.
The club is replacing the failed engine. We’ve removed the alarm override switch and replaced the whimpy yanmar buzzer with a 110db alarm. For those of us who have installed similar yanmar engines, I suggest doing the same. I’ll be taking a close look at my instrument panel this evening. The yanmar alarm has several wire terminals for the connection of various engine senders. Its not clear that you can just replace the buzzer with a different one. I think there are isolation diodes in the buzzer. I may have to do some extra wiring to get this done properly. Once I figure out precisely what’s needed, I’ll send out another message with more info.
Regards
Rich CarterPost generated from Pearson424 Forum using Mail2Forum
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Rich,
I'll be interested in the wiring you come up with. Last fall when motor sailing south of Winyah Bay the engine drain cock came loose and dumped all of the coolant into the containment pan under the engine. The over-temp alarm came on but it was so weak my crew on watch couldn't figure out where it was coming from. Fortunately I'm a light sleeper when off-watch and it go me up and discovered the engine temp gauge was pegged. Shut the engine down before any damage, but I'm not sure what would have happened if I hadn't woken up.RE: The oil loss. The old gasket sounds like a culprit, but its hard to believe that wouldn't have been noticed by whomever did the oil change – unless they just closed up the engine without running it.
Oh, I now check that drain cock very often.
On Thu, May 21, 2009 at 1:32 PM, < ([email][/email])> wrote:
My yacht club has two launches with Yanmar 75 horse engines. The boats were purchased new about 3 years ago. This is the same engine that I have in my boat. When servicing one of the launches this spring, someone improperly installed an oil filter. I'm not sure how you do this wrong. Perhaps they didn't remove the gasket from the old filter before installing the new one. The filter leaked all the engine oil into the bilge and then seized. The operator didn't hear the engine alarm. It is suspected that instrument panel alarm override switch was set, silencing the alarm. The yanmar alarm is not very loud. Its possible that the operator didn't hear the alarm over the engine noise even if the switch was not set.
The club is replacing the failed engine. We've removed the alarm override switch and replaced the whimpy yanmar buzzer with a 110db alarm. For those of us who have installed similar yanmar engines, I suggest doing the same. I'll be taking a close look at my instrument panel this evening. The yanmar alarm has several wire terminals for the connection of various engine senders. Its not clear that you can just replace the buzzer with a different one. I think there are isolation diodes in the buzzer. I may have to do some extra wiring to get this done properly. Once I figure out precisely what's needed, I'll send out another message with more info.
Regards
Rich Carter—
Regards,
John Stevenson
http://www.svsarah.comPost generated from Pearson424 Forum using Mail2Forum
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Hi Rich,
I suspect that the Yanmar alarm can be replaced with a standard Radio Shack 12v alarm buzzer – it seems unusual that Yanmar would go out of its way to use a buzzer that's some other voltage. Easy way to find out is to test the voltage when the key is on but engine not started (unplug alarm first). I replaced my Westerbeke 58 alarm that got full of water (I really don't know how). Man, is it loud and annoying. I think you could hear it at the marina office – 700 feet away!
Bob
On Thu, May 21, 2009 at 1:32 PM, < ([email][/email])> wrote:
My yacht club has two launches with Yanmar 75 horse engines. The boats were purchased new about 3 years ago. This is the same engine that I have in my boat. When servicing one of the launches this spring, someone improperly installed an oil filter. I'm not sure how you do this wrong. Perhaps they didn't remove the gasket from the old filter before installing the new one. The filter leaked all the engine oil into the bilge and then seized. The operator didn't hear the engine alarm. It is suspected that instrument panel alarm override switch was set, silencing the alarm. The yanmar alarm is not very loud. Its possible that the operator didn't hear the alarm over the engine noise even if the switch was not set.
The club is replacing the failed engine. We've removed the alarm override switch and replaced the whimpy yanmar buzzer with a 110db alarm. For those of us who have installed similar yanmar engines, I suggest doing the same. I'll be taking a close look at my instrument panel this evening. The yanmar alarm has several wire terminals for the connection of various engine senders. Its not clear that you can just replace the buzzer with a different one. I think there are isolation diodes in the buzzer. I may have to do some extra wiring to get this done properly. Once I figure out precisely what's needed, I'll send out another message with more info.
Regards
Rich Carter—
Bob Fine
s/v Pelican
Hull #8Post generated from Pearson424 Forum using Mail2Forum
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The extra gasket is the usual suspect. That happens more often than you might think (ask any Jiffy Lube manager). Also wrong filter, but the improper seat is a hard thing to miss when it starts (hopefully you are nowhere near it).
I saw the results of a failed off brand filter that failed on a Toyota 22R in a small truck. It blew the cylindrical cover clean off it, no bilge to clean up though.
ChuckOn Thu, May 21, 2009 at 1:32 PM, < ([email][/email])> wrote:
I'm not sure how you do this wrong.
Post generated from Pearson424 Forum using Mail2Forum
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Bob
Its not the voltage rating. I think there are isolation diodes in the buzzer. The instrument panel has four idiot lights. The four wires from the lights also go to four wires on the buzzer. If there weren’t diodes in there, this would short the four idiot lights together so they would all come on in any failure.Regards
Rich
Original Message
<.. snip>Post generated from Pearson424 Forum using Mail2Forum
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Oh, ah. As I have only one idiot light and it goes on with the buzzer, it's an easy thing to hook up. You're correct, though, if one buzzer is attached to more than one light you'd need diodes. I don't remember what the Yanmar panel looks like.
Bob
On Fri, May 22, 2009 at 11:01 AM, < ([email][/email])> wrote:
Quote:Bob
Its not the voltage rating. I think there are isolation diodes in the buzzer. The instrument panel has four idiot lights. The four wires from the lights also go to four wires on the buzzer. If there weren't diodes in there, this would short the four idiot lights together so they would all come on in any failure.Regards
Rich
Original Message
<.. snip>Post generated from Pearson424 Forum using Mail2Forum
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