Life of a Diesel Engine?? - SailNet Community
 1Likes
Reply
 
LinkBack Thread Tools
post #1 of 32 Old 09-10-2006 Thread Starter
Senior Member
 
Pamlicotraveler's Avatar
 
Join Date: Aug 2006
Location: Creedmoor NC
Posts: 605
Thanks: 5
Thanked 1 Time in 1 Post
Rep Power: 9
 
Life of a Diesel Engine??

I am wondering what everyones thought are about the potential life of a diesel engine.

I am looking at several boats that have high engine hours. If an engine is used a lot, but well-maintained, what would be the expected life be? Is 5,000 a high number, or do they usually go to 10,000? Specifically, how about a Perkins 4108 or Yanmar? Anyway, just curious.
Pamlicotraveler is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #2 of 32 Old 09-10-2006
moderate?
 
camaraderie's Avatar
 
Join Date: May 2002
Location: East Coast
Posts: 13,877
Thanks: 0
Thanked 3 Times in 3 Posts
Rep Power: 16
     
They keep going and going if taken care of well...but I guess about 5000 hrs. is considered high "mileage" in the used boat market. Typically a lot of boats need rebuilds in the 5-10K area so you ideally would want the prior owner to have taken care of that expense. I'd also be wary of a boat that was relatively young and had a lot of engine hours...not that that s so terrible but it is usually a good sign of charter use which is not so good!
Well kept diesels can last 15-20,000 hrs. the trouble is finding one which has been well kept! Perkins makes a very rugged engine, but I've heard that 4-108 parts are getting hard to find now. I presently have a 4-286 on my boat and it keeps on chugging! Had a Yanmar 44 on my last boat and it too kept me happy with no problems. I would think that the higher compression and RPM's in the Yanmar would cause a shorter life but maybe more modern materials make it all come out about even. I WOULD avoid the turbo models.
camaraderie is offline  
Quote Quick Reply Share with Facebook
post #3 of 32 Old 09-10-2006 Thread Starter
Senior Member
 
Pamlicotraveler's Avatar
 
Join Date: Aug 2006
Location: Creedmoor NC
Posts: 605
Thanks: 5
Thanked 1 Time in 1 Post
Rep Power: 9
 
Quote:
Originally Posted by camaraderie
Typically a lot of boats need rebuilds in the 5-10K area so you ideally would want the prior owner to have taken care of that expense.
Is a "rebuild" a major expense? Any idea?
Pamlicotraveler is offline  
Quote Quick Reply Share with Facebook
post #4 of 32 Old 09-10-2006
Senior Member
 
sailandoar's Avatar
 
Join Date: Mar 2006
Location: Cape Fear, NC, USA
Posts: 208
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 10
 
Slow speed => long life

Our 22hp Sabb '2GZ' is said to go 40,000+ hours between major overhauls. (Redline is 1,800 RPM)

Check back in a few years.
sailandoar is offline  
Quote Quick Reply Share with Facebook
post #5 of 32 Old 09-10-2006 Thread Starter
Senior Member
 
Pamlicotraveler's Avatar
 
Join Date: Aug 2006
Location: Creedmoor NC
Posts: 605
Thanks: 5
Thanked 1 Time in 1 Post
Rep Power: 9
 
That's encouraging.... I guess they make airplane engines so they need to be reliable
Pamlicotraveler is offline  
Quote Quick Reply Share with Facebook
post #6 of 32 Old 09-10-2006
Banned
 
Join Date: Apr 2006
Location: MS Gulf Coast
Posts: 711
Thanks: 0
Thanked 3 Times in 3 Posts
Rep Power: 0
 
Addressing the itch of curiosity, why avoid the turbo models? As for rebuild expenses, yeah, it can get pretty steep. You're dealing with better materials to begin with, and quality costs more. This is more than balanced by the return on the investment since it'll last so long between major overhauls.
seabreeze_97 is offline  
Quote Quick Reply Share with Facebook
post #7 of 32 Old 09-10-2006
Telstar 28
 
sailingdog's Avatar
 
Join Date: Mar 2006
Location: New England
Posts: 43,290
Thanks: 0
Thanked 15 Times in 12 Posts
Rep Power: 14
         
One thing to remember, a diesel engine with low hours, that is older, is probably going to have more problems than one that is the same age and has more hours. Low-hour engines generally have a lot more issues caused by disuse, than engines that are run more often and properly maintained.

Sailingdog

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
.

Still—DON'T READ THAT POST AGAIN.
sailingdog is offline  
Quote Quick Reply Share with Facebook
post #8 of 32 Old 09-10-2006
Member
 
Join Date: Jul 2006
Location: East Greenwich, RI
Posts: 34
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
Generally, at around 5000 hours, the 4-108 head will need to come off and be rebuilt including valves, valve stems/guides, valve springs etc. Also, the timing chain will likely have a lot of slack and wear and it too should be replaced however many run on without. These are wonderful diesel engines and worth this attention if you have confidence in how the previous owner, or owners, kept maintenance.
EagleSailtwo is offline  
Quote Quick Reply Share with Facebook
post #9 of 32 Old 09-11-2006
Banned
 
Join Date: Apr 2006
Location: MS Gulf Coast
Posts: 711
Thanks: 0
Thanked 3 Times in 3 Posts
Rep Power: 0
 
Timing chain??? Yikes!
seabreeze_97 is offline  
Quote Quick Reply Share with Facebook
post #10 of 32 Old 09-11-2006
Member
 
Join Date: Jul 2006
Location: East Greenwich, RI
Posts: 34
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
Quote:
Originally Posted by seabreeze_97
Timing chain??? Yikes!
Oops, I confused the 4108 with another similar diesel that does use a timing chain. The 4107 and 4108 in fact run helical timing gears run off the cam and seldom wear out....sorry
EagleSailtwo is offline  
Quote Quick Reply Share with Facebook
Reply

Quick Reply
Message:
Options

By choosing to post the reply above you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Register Now



In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.


User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
Isuzu C240 Diesel Engine Troubleshooting soflajo Gear & Maintenance 6 07-28-2009 04:16 PM
Diesel Engine Problem bmelchionda Gear & Maintenance 6 09-12-2006 11:20 PM
Help Us Test Life Rafts DSRitter Gear & Maintenance 1 07-15-2002 06:01 PM
Cat30 Exhaust riser blew up - Engine won''t start E_N_Z_O Gear & Maintenance 2 07-31-2001 06:55 PM
Diesel Engine nancisboat Crew Wanted/Available 0 03-13-2001 08:49 AM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome