| 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 |
