| Author |
Message |
    
chris_g
New member
Username: chris_g
Post Number: 1
Registered: 09-2007
| | Posted on Monday, September 10, 2007 - 01:13 pm: | 
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Hi there,
I have a 1973, Volvo-Penta MD6A, 2cyl, 10hp diesel engine aboard my Albin Vega 27'. Recently, After a long trip, I returned to the boat and tried cranking the engine over and all I got was a chattering that seems to originate in the voltage regulator/relay unit. I have a Bosch Dynastart starter/charger and was wondering what might be the cause of this noise?
I replaced the voltage regulator with an original used unit that I purchased from Europe, but after trying it this past weekend...I was met with the same buzzing sound and chatter in the box. The battery seems fine, but could that be the cause? Perhaps frozen bearings? Just grabbing straws here as I am no mechanic, and this is my first diesel.
Many thanks for your suggestions and hints!
Chris |
solarrog
Senior Member
Username: solarrog
Post Number: 260
Registered: 03-2002
| | Posted on Monday, September 10, 2007 - 01:24 pm: |
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Charge the battery and try again
Roger |
chris_g
New member
Username: chris_g
Post Number: 2
Registered: 09-2007
| | Posted on Monday, September 10, 2007 - 01:39 pm: |
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Hi Roger,
I tested it with a Multi-meter, but perhaps that was not a good indication of the true charge? Should the engine start, does this mean that my alternator is not charging the battery, or perhaps I have a drain in the system somewhere that would have drawn down the battery in the first place? This is a new battery this year...Curious...
Thanks for the advice!
Chris |
solarrog
Senior Member
Username: solarrog
Post Number: 261
Registered: 03-2002
| | Posted on Monday, September 10, 2007 - 02:02 pm: |
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Voltage in a battery is not a great indicated of current available, in any event a charged battery will show 12.7 to 12.8 volts unless you just took it off the charger, The surface charge will show higher for hours. If you are showing less than this charge the battery. Its easy to test the charging system, check the battery voltage
then start the engine and check again, if its the same or less you have a problem, If it shows in the thirteens (13.8 v) your system is probably ok, also check with the ign off for voltage between the battery and one cable with the cable removed, If its showing 12 volts something is shorting and draining your battery
this assumes you have resolved the starting issue and are now testing the charging system.
can you turn the engine over by hand? Is it seized or turns over normally? How old is this engine? whats the oil look like? |
chris_g
New member
Username: chris_g
Post Number: 3
Registered: 09-2007
| | Posted on Monday, September 10, 2007 - 02:19 pm: |
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I do have a hand crank and will try that out. Never had to hand crank an engine before, but time to learn I guess!
the oil should be changed, though it was changed at the beginning of the season, but I have put well over 50 hours on her and, funny enough, I went to the boat to change the oil with a friend of mine when we discovered the problem that is currently plaguing the boat. |
solarrog
Senior Member
Username: solarrog
Post Number: 262
Registered: 03-2002
| | Posted on Monday, September 10, 2007 - 02:33 pm: |
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with regards to the oil what I was fishing for was any water mixed with it, doesnt sound like that is the case, Starter solenoids' will rattle or click if the current is to low to start an engine, again charge the battery or replace it.
Roger |
chris_g
Member
Username: chris_g
Post Number: 4
Registered: 09-2007
| | Posted on Saturday, September 29, 2007 - 09:57 pm: |
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Hi guys!
I have tried everything. The batteries have been charged...tried that..nothing. I still get the chatter from the Voltage Regulator.
Could the Dynastart starter motor have seized bearings or something similar that does not allow the motor to turn over, thus sending a current back to the regulator which results in the sound? Is that at all possible?
I may have to take the starter off and have it bench tested. I have looked for a Bosch Dynastart manual, but have not had any luck. Would love to have a go at it myself before I start shelling out the coin ($$$) to either have it rebuilt or replaced.
Thanks again!
Chris |
chris_g
Member
Username: chris_g
Post Number: 5
Registered: 09-2007
| | Posted on Sunday, September 30, 2007 - 07:30 pm: |
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I think now that it may be the starter solenoid. Can these be tricky to replace or fix? Is it possible to fix on my own, or do I hear the sound of dollar bills floating out the window?
I will test the ground, and try jumping the starter directly...maybe try tapping it with a hammer while trying the key? More than likely it could be corrosion or something like that with the solenoid, but I have no idea. Do these meathods sound OK, or am I way off here?
Thanks Guys
Chris |
chris_g
Member
Username: chris_g
Post Number: 6
Registered: 09-2007
| | Posted on Saturday, October 27, 2007 - 11:29 pm: |
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I removed the starter motor and had it bench tested and it seemed to run fine. The dynastart was also charging, so things seem to be OK on that end.
If this is a ground issue, what is the best way to test for that? Do I need to go back over all the cables, wires and connections and clean all the contact points? |
whistler
New member
Username: whistler
Post Number: 1
Registered: 08-2009
| | Posted on Saturday, August 22, 2009 - 01:28 pm: |
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Looking for a recommendation for a thermostat to replace the no longer available one for a an Albin AD-2 (likely a Volvo part). |
tomkonings
New member
Username: tomkonings
Post Number: 1
Registered: 03-2010
| | Posted on Thursday, March 04, 2010 - 09:30 am: |
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Hi All,
I have just bought a life boat with a MD6A engine.
The boat will sail in April, but it is good to know that there is a place to turn to when I run into trouble. Considering the little number of posts the engine is probably an engine with little trouble! I do have a question: the life boat is 7 meters long and weighs approx. 2000Kilo's and I use it only to sail through the amsterdam canals. Can you tell me whether you think the engine is powerfull enough?
thanks, Tom |
volvoist
Visitor
| | Posted on Friday, April 16, 2010 - 03:39 pm: |
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Hi,
the MD6A was and is used to power seagoing 4-ton sailing boats, so you should have nothing to worry. :-)
Regards,
A guest volvoist |
goshohmighty
New member
Username: goshohmighty
Post Number: 1
Registered: 04-2010
| | Posted on Saturday, April 24, 2010 - 12:03 pm: |
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Well now...we always check the battery posts and terminal connections when the starter solenoid clatters.
The low voltage system such as lights will often work great even with dirty terminals, and you will think the battery is just fine. Yet the click or clattering when you turn the starter key is a good indicator of a poor contact at the battery post. |
matt_morehouse
Advanced Member
Username: matt_morehouse
Post Number: 45
Registered: 12-2009
| | Posted on Sunday, April 25, 2010 - 12:02 am: |
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Can you can turn the engine with the crank? If so the problem is electrical. Clean all connections, and I mean all between battery, starter motor, and ground. In this case cleanliness is not next to Godliness it is Godliness, I'm talking clean and tight. If it still doesn't turn get a new battery and try it.
If that doesn't do it take two aspirin and call me in the morning.
I have other ideas. |
krisvanwissen
Visitor
| | Posted on Wednesday, August 04, 2010 - 04:35 pm: |
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are the starting cables the right size?
how long is the run from solenoid to engine?
if you bridge the starting solenoig +va cables does it start, or chatter, maybe teh chattering is related to the key switch not passing enough current to throw the solenoid.
just ideas for what its worth. |
andy melnicki
Visitor
| | Posted on Saturday, October 09, 2010 - 08:03 pm: |
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Hi, I have a 1975 volvo penta md6a in my boat and the only way I can get it to start when it has been sitting for a few days is to raise the decompression lever about a 1/4 inch from the home position. If I don't the engine just keeps cranking without firing. When I get it running with the decompression lever it starts fine all day as long as the engine is still warm. I adjusted the lifters to specs .012 in. and replaced the air cleaner. Anyone have any ideas or tips, it would be certainly appreciated.
Andy |
matt_morehouse
Senior Member
Username: matt_morehouse
Post Number: 59
Registered: 12-2009
| | Posted on Sunday, October 10, 2010 - 06:55 pm: |
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What's the air temperature? I can't remember but I don't think that engine has glow plugs.
Here's a trick I used to to start a recalcitrant engine: squirt a few drops of engine oil into the cylinders though the intake ports. That will slightly increase the compression ratio and usually lights it up.
I know you are not supposed to use starting fluid, but I have in the past with no ill effects. Another trick is to use WD40 instead of starting fluid, less volatile but still has enough bang to wake her up.
Why isn't the word that is a synonym for surrounding temperature allowed? Begins with am and ends with bient. |
goshohmighty
New member
Username: goshohmighty
Post Number: 2
Registered: 04-2010
| | Posted on Sunday, October 10, 2010 - 11:53 pm: |
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http://www.oldmarineengine.com/cgi-bin/discus/show.cgi?tpc=3&post=33249#POST3324 9
I had the same problem...turns out it was a leaking 0-ring at the fuel shut-off lever on the fuel injection pump. The deisel would backdrain out of the device when the engine sat for a day.
Check for any small fuel drip around there when the MD6A is running. You can fix this yourself. But there is some info I can help with.
I have many spare o-rings too. |
adsum
Member
Username: adsum
Post Number: 16
Registered: 01-2008
| | Posted on Monday, October 11, 2010 - 03:38 am: |
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It might have something to do with the cold start device. The MD6A has an automatic one. When stopping the engine this device is engaged by pushing the stop control fully. So when the engine is stopped by lifting the decompression lever it is not engaged and the engine will have starting problems. I had the same problem with an MD2B until I discoverd the hand-operated cold start button on the fuel injection pump. With the cold start button pressed down that engine starts immediate.
I'm interested in the answer about that forbidden word that ends with "mbient". I experienced the same refusal of a post when I used it in combination with "temperature". The only other use of that word, that I know, is to point out a musical genre in house music. But I'm not a native speaker so maybe I am not acquainted with the improper meaning of that word in slang. |
jimdereynier
Advanced Member
Username: jimdereynier
Post Number: 38
Registered: 08-2007
| | Posted on Monday, October 11, 2010 - 08:13 am: |
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small Propane torch-
Not sure if this will work on your engine but for my Sabb 2H in a New England winter, I add the oil that Matt mentions and then put a soldering torch down the intake port to heat the air. |
amajuba
New member
Username: amajuba
Post Number: 1
Registered: 10-2010
| | Posted on Monday, October 11, 2010 - 10:10 am: |
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Need contact for Arona Bearing, mod AD 290 m. (based on Lambardini) 2 cylinder, 27 Hp, Piston size 90 mm , M1 and m3 =55 mm M2 55.35 mm BE = 50 mm.
Bi metal , steel and White metal split. engine is in 32 WSadler, appreciate any advise or help. |
matt_morehouse
Senior Member
Username: matt_morehouse
Post Number: 60
Registered: 12-2009
| | Posted on Monday, October 11, 2010 - 10:23 am: |
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If the mbient temperature is cold and you have access to shore power a hair dryer can be used instead of a torch---less chance of fire.
I am a native American English speaker and know of no other than a benign meaning for the forbidden word. An explanation is in order. |
amajuba
New member
Username: amajuba
Post Number: 2
Registered: 10-2010
| | Posted on Tuesday, October 12, 2010 - 02:56 pm: |
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Can't beleive my luck, a fellow yottie phoned to say he heard my plieght with the Arona AD290 m, and said to call around and collect a complete engine which he replaced because the exhaust manifold had cracked. when he removed it , it was running well. Thanks Keven. can relax again. eugene , amajuba |
thomasfinnan
New member
Username: thomasfinnan
Post Number: 1
Registered: 02-2011
| | Posted on Saturday, February 05, 2011 - 11:52 am: |
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hi i have an albin vega 27 with a volvo penta md6a diesel engine. the bosch fuel injection pump is damaged at the rear.need the rear end of an injection pump and diaphram kit for fuel pump. can enyone help.. |
kuba
New member
Username: kuba
Post Number: 1
Registered: 12-2014
| | Posted on Sunday, December 21, 2014 - 12:03 pm: |
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Does anyone know where can we get a crank handle for MD6?
Who would store old, second hand spare parts for MD6?
Any advise would be highly appreciated. |
johnnymarkwith
Visitor
| | Posted on Tuesday, February 02, 2016 - 12:04 pm: |
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i have a 1974 md6a when i turn the key it turns over i get smoke and water flow it sounds like its about to stay running but as soon as i turn the to the on position it wont stay running also i try give it fuel i get nothing. any thoughts |
matt_morehouse
Senior Member
Username: matt_morehouse
Post Number: 164
Registered: 12-2009
| | Posted on Tuesday, February 02, 2016 - 11:36 pm: |
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What color smoke? Is it running on it's own or just turning on the starter motor? Does it turn quickly or sluggishly?
Is it getting clean and pure fuel (without air)? How long has it been since it was last running to your satisfaction?
What is the local temperature? Salt or FW cooled?
Answer these questions and many here will gladly be able to help. |
