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Old 04-14-2017, 10:27 PM   #1
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Which diesel

Just starting to look at trawlers and wondering if there are specific diesels, I should steer away from because of serviceability, part availability, or fuel consumption? I probably won't pick a boat because of it's engine, but if it comes down to 2 maybe the type of diesel would become the deciding factor.
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Old 04-15-2017, 02:13 AM   #2
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I would steer well clear of volvos and anything that is light, electronic and fast spinning if you plan on going anywhere away from service centres.

Heavy, basic and slow is good for reliability.
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Old 04-15-2017, 04:09 AM   #3
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Boat size will dictate engine models. What size boat?
I recommend engines that are all mechanical, no circuit boards, electronic sensors, etc. All electronics fail eventually and can be difficult to troubleshoot w/o expensive test equipment.
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Old 04-15-2017, 06:47 AM   #4
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The condition of the individual engine is more important that the brand. Make sure you have a good surveyor.

Once you have found a boat that you are interested in, come back here with the make and model of the engine, and I am sure that you will get at least twenty different opinions.
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Old 04-15-2017, 07:09 AM   #5
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If you are really interested in researching diesels spend some time over on boatdiesel.com
More than you may want to know but a valuable resource for whichever engine you end up with.
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Old 04-15-2017, 07:21 AM   #6
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Welcome to the forum! Pick your boat first and then see what engine options are available. If you're planning to cross oceans and discover new worlds, the engine choice is very important. For coastal cruising, there are lots of good engines and a few models to avoid.

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Old 04-15-2017, 10:08 AM   #7
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The following is slightly modified from a post a year or so ago, the result of a lot of shopping for a boat. I think the individual engine is more important than these generalities but in my shopping experience good records are no longer "trendy". I ran into more than one boat where the maintenance records on a 10+ year old boat were 2 hand written pages or less.

Quote:
These are generalities:

Lugger/John Deere-desirable engines-reliable, economical

Cummins VT-555 parts expensive and difficult to get
Cummins 6BT and 6CT-good engines, run well
Cummins Q series-newer, good-can run slow for economy w/o a problem

Caterpillar 3208 Good, reliable-better with less HP squeezed out
Cat 31xx series not highly desirable
Cat C Series-newer, similar thoughts to Cummins Q

Detroit x-53, x-71 are repairable, rebuildable, reliable but a little loud and a little messy. Better the less HP you squeeze out.

Detroit DDEC-avoid--less reliable parts availablity difficult

Detroit 4 stroke diesel--don't know but not many there

MAN-a lot in some Bayliners/Meridians--don't know

Volvo-some good engines, expensive to maintain, parts may be difficult

I forgot these:
Lehman-the 120 & 135-economical, reliable and parts available

Perkins-reliable, some better than others
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Old 04-15-2017, 11:03 AM   #8
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I would not buy a Detroit 8.2, long history of problems.
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Old 04-15-2017, 11:38 AM   #9
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I would enjoy any 71 series Detroit Diesel, but few were installed in White Boats.

A 3-71 would power most cruisers of 40-50 ft at very modest RPM.

They are fine with 1200RPM and a good load.

T-D has trannys that are heavy (WWII era) , require no cooling and can be operated in reverse 100% of the time with only a 3% power loss.
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Old 04-15-2017, 11:43 AM   #10
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A big concern is also parts and service availability where you keep the boat.
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Old 04-15-2017, 12:53 PM   #11
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Have owned twin VOLVOs for 17 years and have found that VOLVO parts cost triple that of Cummins or Cat, if you can even find them. VOLVO "enjoys" the poorest customer service in the industry, with no dedicated dealers.
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Old 04-15-2017, 01:28 PM   #12
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Quote:
BS!


No more costly to maintain than any other marine engine and parts are available if you have a brain.
OK with me
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Old 04-15-2017, 01:49 PM   #13
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Since Volvo has so many semi-tractor trucks on the hi-ways in the U.S. I would believe that you went to centers that service those trucks you might have better luck finding parts.
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Old 04-15-2017, 01:51 PM   #14
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Quote:
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BS!


No more costly to maintain than any other marine engine and parts are available if you have a brain.
Cost a mate running a trading vessel a fortune to maintain and repair in a relatively remote area where every bit of machinery is cat, cummins, komatsu and kubota.
So much so that he found it cheaper to scrap his newish electronic vulva's and replace with a pair of low tech cats before he was sent bankrupt.
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Old 04-15-2017, 02:28 PM   #15
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Quote:
Originally Posted by Ken E. View Post
A big concern is also parts and service availability where you keep the boat.
This.

Volvo and Yanmar is readily available in my area.

Cat and Cummins, not so much.

Go figure.
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Old 04-15-2017, 04:16 PM   #16
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So much is going to be dictated by the boats you're looking at, your cruising grounds and the age of the engines. The maintenance of the engines and condition at purchase are more critical than the brand.
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Old 04-15-2017, 04:16 PM   #17
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please make your second post about anchors.
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Old 04-15-2017, 07:09 PM   #18
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Quote:
Originally Posted by ktdtx View Post
The following is slightly modified from a post a year or so ago, the result of a lot of shopping for a boat. I think the individual engine is more important than these generalities but in my shopping experience good records are no longer "trendy". I ran into more than one boat where the maintenance records on a 10+ year old boat were 2 hand written pages or less.
What is the opinion on Yanmar?
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Old 04-15-2017, 07:31 PM   #19
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Wow!
Someone asking for my "opinion".

All the info I collected was from poking around so it is a compilation of a lot of others experiences and opinions that I just put together. There are way better opinions than mine....but since you asked:

I think they are a good, sound engine of the high RPM type. Probably better in other than trawler type use. I don't know how good they are if used continuously at lower 7-8 kt RPM/speed
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Old 04-15-2017, 07:37 PM   #20
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This risked being a Ford vs GM type debate, with one anti Volvo guy yet to post.
But, when a neighbour bought a recent model Riv 40 with twin Volvos, our marina mechanic said "it has a problem, 2 problems actually".
I was checking a boat online recently, twin Volvo D4s,300 hp, are the newer ones better?
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