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Old 01-14-2016, 10:43 AM   #1
City: Tucson
Country: USA
Vessel Name: Urge
Vessel Model: 44' Marine Trader, Double Cabin Trawler
Join Date: Oct 2015
Posts: 6
1979 44' Gulfstar Motor Yacht

I'm considering the purchase of a 1979 44' Gulfstar Motor Yacht and am interested in your input and comments regarding this year & model of boat. It has dual Perkins, model 6.354 engines with 3400 hours each. What's a reasonable number of hours to expect from these engines?

Thank you in advance for any and all input.


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Old 01-14-2016, 11:40 AM   #2
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City: Point Judith, RI
Country: USA
Vessel Name: In Sanity
Vessel Model: 1981 Mainship 40'
Join Date: Jan 2015
Posts: 407
Get your own mechanic to do a full check up on those engines (especially heat exchangers). Sickly ones will cost big money. Healthy ones last 10,000 hrs I'm told.

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Old 01-14-2016, 01:08 PM   #3
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City: Exumas
Country: Bahamas
Vessel Name: Bad Monkey
Vessel Model: Gulf Star 43
Join Date: Jul 2015
Posts: 174
I have 6-354s on our 43' Mark 1 GS. If you look for "A Bad Monkey Tail" in General discussions you will see all the work we have done on the engines.
Latest is that one of the fuel pumps has a failed O ring So they will both be removed and taken to be serviced. (Not just because of the O ring but it is time they should be done) Not a simple thing since we are in the Exumas, Bahamas.
Nether the less you should gain some helpful info from it. All the best.
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Old 01-14-2016, 01:13 PM   #4
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City: Mount Vernon, WA / La Conner, WA
Country: USA
Vessel Name: Otter
Vessel Model: 1985 President Sundeck 41
Join Date: Dec 2015
Posts: 78
Anxiously waiting for replies...
We've got the same engines (naturally aspirated) with a tad over 3,600 hours on each.
We've only put about 10 hours on em since we picked it up in November 2015.

I've been told they're good to at least 6 times that amount (20,000 hrs), but I'd rather hear from some other sources as well, especially seeing that Gabe n Em mentioned 1/2 that amount.

By the way, we had both heat exchangers serviced before we took delivery.
I noticed one of the transmissions was running 40 warmer than the other on the sea trials.
Trans housing temps (used a pyrometer) were 100-105 on port, and 140-145 on starboard.
According to the shop, it was the heat exchanger, so for peace of mind we went ahead and had them both done.

Thanks for the suggestion on reading your thread.
Heading over there right now.
Here's a link for your enjoyment steveb.
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