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Old 18-01-2010, 18:25   #1
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Nassau, Yanmar Diesel Service?

Hi, I just arrive in Nassau today. When I left this morning the engine could not give me more than 2000rpm and anyware above 1700 the exhaust water is BLACK, unburned diesel I belive. Look like an engine overload according to the shop manual (air filter is OK).

I would like to find a reliable Nassau Yanmar service diesel mechanic if you know any??? (so I can sail down to the Exumas!!!)

Sylvain
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Old 18-01-2010, 20:30   #2
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Do your self a favor and jump overboard and check your prop. Chances are you picked up something on your prop. That is a typical description of a dirty prop or something wrapped around it.
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Old 19-01-2010, 06:49   #3
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I just dive a minute ago and checked the prop (maxprop) and it is working fine.

Anybody knows a Yanmar mechanic in Nassau?

Sylvain
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Old 19-01-2010, 08:32   #4
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How old is the engine? The exhaust elbow may be clogged. In that case the engine will usually idle fine and ther will be nml water output but when the engine is sped up the exhaust back pressure will load the engine.
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Old 19-01-2010, 08:32   #5
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Always check th prop first as Badsanta suggested. Do yourself another favor and pull the exhaust elbow first.
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Old 19-01-2010, 09:14   #6
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Anyway of knowing the engine temperature, is there miss at all, and when under load does she load up, does your fuel filter have a glass blow for inspection, is there anything usual in it. What make of yanmar and how old.
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Old 19-01-2010, 09:39   #7
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Is the oil level correct on dip stick? Yanmar fuel lift pump diaphrams do go bad, and then the oil sump gets filled with fuel/oil. It will start and run for a few minutes, then lots of black smoke and power loss. If your dipstick reads above the full line, this is the probable cause. Solution is to replace the fuel lift pump or at least install a new diaphragm in same.

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Old 19-01-2010, 12:33   #8
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Bahamian Yanmar Dealers are located in Abaco, Eleuthera, and Grand Bahama; but I donít see on on New Providence.
See ➥ Yanmar - Distributor or dealer

Contact Yanmar Marine USA Corp.
Regional headquarters
101 International Parkway
Adairsville, GA, 30103
Tel: 770-877-9894
Fax: 770-877-7565
Email: service@yanmar-yma.com

or

Complete Yacht (Dealer)
200 SW 33rd Street
Ft. Lauderdale, Fl, 33315
Tel: 954 462 4377
Fax: 954 524 0261
Web: Yacht service, Yacht Repair, Yacht Engines, Diesel Yacht Engines at Complete Yacht service.com
Email: comyacht@bellsouth.net

Good luck!
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Old 19-01-2010, 13:42   #9
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Thank you so much for the reply, for the record the yanmar service here in Nassau is ''Marine Diesel 394-2135''.

I have removed the air filter, same problem. THe service guy suggested to replace my racor fuel filter, it is only 60 hours old, but the problem appeared after a day of motoring againt the wind in waves. But I dont see how this would create that problem??

Will check the elbow.
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Old 19-01-2010, 14:15   #10
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Quote:
Originally Posted by Rastarea View Post
Thank you so much for the reply, for the record the yanmar service here in Nassau is ''Marine Diesel 394-2135''.

I have removed the air filter, same problem. THe service guy suggested to replace my racor fuel filter, it is only 60 hours old, but the problem appeared after a day of motoring againt the wind in waves. But I dont see how this would create that problem??

Will check the elbow.

Wanna bet? All here who have never had a dirty tank get churned up in waves and clog the fuel filter raise your hand. OK, I know there will be those few perfectionists that this never happens to, but for the rest of us.
Change the Racor filter first. It's probably done it's job.
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Old 19-01-2010, 14:24   #11
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Quote:
Originally Posted by Rastarea View Post
Thank you so much for the reply, for the record the yanmar service here in Nassau is ''Marine Diesel 394-2135''...
Marine Diesel Ltd. May be Yanmar dealers (I donít know)
#5 Shirlea Road, P.O. Box CB 11039
Nassau, Bahamas
Tel: (242) 394-2135
Fax: (242) 394-1825
24-hour: (242) 477-4094
Email: marinediesel@batelnet.bs
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Old 19-01-2010, 16:20   #12
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Quote:
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it is only 60 hours old, but the problem appeared after a day of motoring againt the wind in waves. But I dont see how this would create that problem??
I haven't got 60 hrs on a Racor filter in a long time. I have dirty tanks and sometimes I get 40 if I'm lucky. When offshore in some sea, maybe 25 hrs....

Sure it could be the filters.
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Old 19-01-2010, 18:20   #13
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Originally Posted by Artful Dodger View Post
Anyway of knowing the engine temperature, is there miss at all, and when under load does she load up, does your fuel filter have a glass blow for inspection, is there anything usual in it. What make of yanmar and how old.
I have an infrared T reader, it was OK, actualy low, like 135F.

No misses, start at 1/4 of a turn.

Yes in the bowl I can see some dust, no water.

Yanmar 3HM35F, about 4000hrs.

Next I will replace the racor filter, and shall have a look inside that elbow. But the sequence of evenement pull in the direction of the filter...run ok...6 hours in the waves...loss of power and black smoke.

If this black smoke is from excessive unburned diesel, how can a restrictive filter cause excessive fuel???
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Old 20-01-2010, 14:29   #14
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latest news: I replaced the racor fuel filter this morning and it is still the same thing. The filter was not so bad afterall, only the bottom 1/4'' was grey and the rest was diesel color.

So this afternoon I have removed the exhaust elbow to look at it...well..what can I say? It looks dirty!! But it is the first time I look at one! So I took it to the shop to have it cleaned and will pick it up tomorow.

If this does not work, the mechanic will come on board for an injection system check.

Sylvain
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Old 21-01-2010, 14:22   #15
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Those who voted for the exhaust elbow..raise your hand!!

The cleaning of the elbow seems to do the job. Before, it could not go over 2500rpm and with a lot of black smoke. Now it rev nicely up to 3600rpm without smoking on neutral. Still need to test it under load, but it look very promissing.

Thanks for all the suggestions, it helped me a lot.

Sylvain
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