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Old 03-23-2020, 04:30 PM   #1
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Mainship 30 Pilot II Engine alarms

I have a 2003 with a single Yanmar 6LPA-STP engine and I don't get the alarms when starting the engine. As I understand, Mainship did it's own wiring, so I was hoping someone has the schematic for my configuration. Is it possible that Marlow would have the specs from the older Mainship models?

Any help would be appreciated.
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Old 03-23-2020, 05:48 PM   #2
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I have the same boat.

Just wondering which alarms you're getting at start up. I am only getting one alarm, "low oil pressure" aural alarm. As soon as the oil pressure comes up, the alarm shuts off. That circuit is shown on the engine schematics.

I'm thinking of adding some others - a fast acting high exhaust temp(no water cooling) maybe a few others - boost pressure
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Old 03-23-2020, 07:22 PM   #3
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RGano had a thread on alarm circuits and adding some indicator lights to know what is actually triggering the alarm. Do a site search and I'm sure it will come up.
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Old 03-23-2020, 07:35 PM   #4
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I would put a test light on the buzzer to check for power. It could be as simple as a dead buzzer.
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Old 03-23-2020, 07:40 PM   #5
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Quote:
Originally Posted by Tonic1 View Post
RGano had a thread on alarm circuits and adding some indicator lights to know what is actually triggering the alarm. Do a site search and I'm sure it will come up.
Yup, the Mainship aural-only alarm seems a shortsighted approach by the manufacturer when sending the consumer out the door with a 30,000-dollar engine. So I elected to install a Seaward Marine alarm panel made for the Yanmar. They are no longer made, but can be found on eBay and such places. The best a couple of us here have been able to figure out is that Mainship took all five or six (if your engine has a boost alarm switch) alarms and ran them them to a common point which none of us have found and thence to a piezo alarm on the back of the console. Nobody has a schematic of it. Check out the thread I did on it a couple years back.
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Old 03-24-2020, 08:56 AM   #6
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Hey, Thanks for the fast response. I'm not getting any alarms, my gauges all work though. So I will test around to see if the alarm works and run that back to the gauge and sensors. I know there is at least one sensors transmission temp, with no gauge, so I would expect an alarm or light for that etc. I will keep you posted.
Jim
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Old 03-24-2020, 10:52 AM   #7
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Jim, I've just now gotten into the wiring of my boat - (bought it in OCT of last year). Behind the helm panel, I found a piezo alert device handing loose (cut loose) - a second device connected and working but again, just hanging loose. Looks like a replacement., evidence of at least one aural alert failure. so I would start with that. The alert is on continuously whenever there is power to the panel & engine, but engine is not running. I assume the result of no oil pressure.

The schematic I have is from the 2007 Operating Manual for the engine - very generic. It shows a "buzzer" as well as a bank of warning lights. (those are not on my panel). I may have a hard copy that is more specific to the boat - will have to check next trip to the boat.

Also found another device hanging loose that looks like it came out of a 2.25" panel hole below and to the left of the steering wheel - that now has a small depth sounder display mounted in it. I think the loose device is related to emergency engine shut down and ER fire control system - still investigating that one.

Unfortunately, I'm five hours from the boat. Only on it a few days out of the month. Not constrained by this virus thing YET - but happy to help you if I can.
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Old 03-24-2020, 11:24 AM   #8
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Thanks, The only place I'm allowed to go to is the boat yard to work on my boat. I will check those items out. Incidently, I just replaced my "fire-Safe" module ($350) I hope the display is ok, that is below the rudder indicator on the port side of the wheel.
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Old 03-24-2020, 11:52 AM   #9
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Quote:
Originally Posted by Olebird View Post
Jim, I've just now gotten into the wiring of my boat - (bought it in OCT of last year). Behind the helm panel, I found a piezo alert device handing loose (cut loose) - a second device connected and working but again, just hanging loose. Looks like a replacement., evidence of at least one aural alert failure. so I would start with that. The alert is on continuously whenever there is power to the panel & engine, but engine is not running. I assume the result of no oil pressure.

The schematic I have is from the 2007 Operating Manual for the engine - very generic. It shows a "buzzer" as well as a bank of warning lights. (those are not on my panel). I may have a hard copy that is more specific to the boat - will have to check next trip to the boat.

Also found another device hanging loose that looks like it came out of a 2.25" panel hole below and to the left of the steering wheel - that now has a small depth sounder display mounted in it. I think the loose device is related to emergency engine shut down and ER fire control system - still investigating that one.

Unfortunately, I'm five hours from the boat. Only on it a few days out of the month. Not constrained by this virus thing YET - but happy to help you if I can.
That dangling thing is most surely the SeaFire fire alarm and override switch module for the engine room fire suppression system. Is there a bottle in the ER? I think you need to bring that boat over to my pier post CV19 and lets sort it out cuz if the PO did that sort of silly thing to it, the boat may have a few other disastrous secrets waiting.

For now rolling south in Pamlico Sound.
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Old 03-26-2020, 12:16 AM   #10
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Hi Rich,

Sounds like you're having a smooth trip.

Weather has slowed down progress on my boat. Either too cold or wet (bottom job took a month), now this virus thing has everyone treading water to see where it's going.

Been working thru issues as I uncover them. Got into the helm panel last trip - replaced the Cobra VHF with a Standard Horizon with AIS receiver as you suggested - of course nothing is easy - mounting hole had to be whittled out for things to fit. PO wiring typical. Not a lot of clean up behind the helm panel necessary but the few changes/additions were not up basic marine standards - automotive butt splices, no water proofing - lot of 3M tape - doing nothing. etc etc.

There is a fire suppression system of some kind in the ER - bottle and some plumbing. Looks OEM. If there is any documentation - I haven't found it -yet! My Sea Ray had a similar set up - no docs, no info - makes one appreciate FAA requirements to document everything on A/C. Bonanza docs fill a 4 drawer (but it's a little older - 1949)

If it's a SeaFire System - their web site is worthless - no data there at all. Install manual is a joke.

Once behind the helm panel "alone" with time to think, (some times I have more "HELP' than I can live with - kids) I realized what ever the device was had been removed to make room for the depth finder. When the engine would not start after they cut it out - they spliced it back in and tie wrapped it to a wire bundle and closed the lid!! (Red Neck engineering at it's best)

Really didn't want to screw with it at the time - boat runs fine as is - but longer term I will put it back to OEM if possible - compliant with good practices and codes.

I suspect you are correct - probably a few hidden zingers - buried somewhere. Been very suspect of anything that looks like it's been changed and closely watching operationally critical parameters - temps/pressures/amps etc. when away from dock.

Have a fun trip around the lower end .... thanks for the comments!

Smooth seas and fair winds!
Larry
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Old 03-26-2020, 12:31 AM   #11
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It might be easier and more reliable to just start with a new system. Seaboard Marine has parts to make up a custom system. It looks pretty comprehensive on their web site. I have no experience with them so I canít say they are good or bad. I just googled marine alarm system and they came up. If you do it from scratch then you will know it is done correctly and have confidence in it.
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Old 03-26-2020, 01:01 AM   #12
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Thanks Dave,

I'm kinda from the ... "If it ain't broke - don't fix it" ... school of engineering. I suspect there was nothing wrong with the original install - but no depth finder on the MS Sound is pretty risky. - mostly sand and mud, But there are a few big chunks of limestone around. Most folks don't have the tools to cut a 2.25" hole in the helm panel - so they took the easy way out.

If I can find docs or figure out how to make it safe for testing, I'll make sure it's operational and dependable - If not, will look at total replacement and upgrade. Fireboy has a good web site on the subject.

How's the engine work coming??

Larry
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Old 03-28-2020, 09:30 AM   #13
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Quote:
Originally Posted by Kelsey View Post
I have a 2003 with a single Yanmar 6LPA-STP engine and I don't get the alarms when starting the engine. As I understand, Mainship did it's own wiring, so I was hoping someone has the schematic for my configuration. Is it possible that Marlow would have the specs from the older Mainship models?

Any help would be appreciated.

Forget trying to find a wiring diagram. Besides the diagram won't tell you where it's located.


I have a 400 with 2 helms and 1 alarm is low volume. A mud dauber got it the small hole. Look at the wiring and you'll see a small black round alarm. Mine is a Projects Unlimited AI-430. Here is a link to one on E-Bay. $3.95


https://www.ebay.com/itm/Marine-Engi...0/273842389448.


As with anything, test it first. Strip back the wires and use a voltmeter. If you have voltage key on-engine off you need an alarm.



If not you have another issue. Test it by disconnecting 1 wire, apply 12 volts to the 2 wires on the alarm and see if it make noise. If so it's the circuit. Think about buying a power probe for this kind of testing.



The alarm sounds until you have 12 volts on the black wire. The 12 volts comes when there is oil pressure.



The alarm is zip tied to the wiring harness. That's how I found the upper helm alarm.


PM me and I'll send a picture of my alarm under the panel.
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Old 03-28-2020, 09:00 PM   #14
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Judging by what we found in a couple of 30 Pilots with the 6LPA-STP, Mainship most likely did not connect aught but the low oil alarm, which is the the one which should come on when first cranking up the engine.There are six possible alarms from this engine, and it is a shame to be running around with engines this expensive without the benefit of all the possible alerts one can get. I would not run the engine until the low oil pressure alarm is fixed. It is pretty simple, and is more than likely a wiring failure of the piezo alarm failure. If you are lazy and don't want to follow the wiring first, change the piezo; then you are gonna be chasing the wiring anyway, but at least you got to put it off.
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