Yanmar 2QM15: How can I keep it running forever? - Page 3 - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > On Board > Gear & Maintenance > Engines > Diesel
 Not a Member? 

Diesel This is a new forum dedicated to diesel engines and their applicable accessories.


Like Tree1Likes
Reply
 
LinkBack Thread Tools
  #21  
Old 04-11-2013
casey1999's Avatar
Senior Member
 
Join Date: Oct 2010
Location: HI
Posts: 2,780
Thanks: 3
Thanked 16 Times in 16 Posts
Rep Power: 4
casey1999 is on a distinguished road
Re: Yanmar 2QM15: How can I keep it running forever?

Quote:
Originally Posted by Rusty123 View Post
Factory recommended maintenance schedule is shown on page 14-1 of this link:

http://j30.us/files/2qm15_servicemanual.pdf

Valve clearance adjustment is recommended at 300 hour intervals, but valve lapping, bearing inspections, and some other relatively intrusive work is recommended at 1,000 hour intervals.

I'm with you on not tearing apart an operating engine, but on the other hand, there must be some valid reason that Yanmar recommends the maintenance.
Never seen anything like that in a manual. Note hours for procedures in 1000. I do not think most people would do that kind of maintenance. For a fisherman using the engine daily for 12 hours per day that means every 83 days he would need to tear down his engine. I don't think that would happen. I think he would run the engine untile it developed compression problems, then fix it. That would probably happen after 10,000 hours if oil change and other routine maintenace were followed. For us sailors maybe doing this procedure every 1000 hours would mean every 10 years, but tearing an old engine down for just an inspection is a big risk. Most mechanics would say if it is running ok, let her be.

I am looking into what other manuals suggest this.
Regards
Reply With Quote Share with Facebook
  #22  
Old 04-11-2013
casey1999's Avatar
Senior Member
 
Join Date: Oct 2010
Location: HI
Posts: 2,780
Thanks: 3
Thanked 16 Times in 16 Posts
Rep Power: 4
casey1999 is on a distinguished road
Re: Yanmar 2QM15: How can I keep it running forever?

I found this thread you might find interesting:
fresh water/closed cooling system conversion - SailboatOwners.com

and another:
http://www.cruisersforum.com/forums/...ild-52497.html

FYI, I checked my 3gmd manual (which also covers 1gm, 2gm, 3gm, 3hm- all engines which share same basic design as the 2qm15) and these engines only call for valve adjust every 500 hours and nothing else.

I also called Torrsen Marine (Yanmar dealer) and the mechanic had never herd of lapping valves as a part of regular maintenance.

Last edited by casey1999; 04-11-2013 at 02:18 PM.
Reply With Quote Share with Facebook
  #23  
Old 04-11-2013
casey1999's Avatar
Senior Member
 
Join Date: Oct 2010
Location: HI
Posts: 2,780
Thanks: 3
Thanked 16 Times in 16 Posts
Rep Power: 4
casey1999 is on a distinguished road
Re: Yanmar 2QM15: How can I keep it running forever?

Rusty,
Did a little more looking. I can find no one that does routine maintenace valve lapping or other internal engine work (other than valve clearance adjustment). If your valves are worn, that would generally show up as a hard starting and maybe poor running of the engine. If your engine is good, I would leave her alone until she shows a problem. A compression check would also indicate a problem, but if your engine is starting and running good, I would leave it at that.

One could cause problems just by trying to lap the valves and make them better than they are now.
Reply With Quote Share with Facebook
  #24  
Old 04-11-2013
Senior Member
 
Join Date: Jun 2004
Location: western LI sound, L.I., N.Y.
Posts: 446
Thanks: 1
Thanked 10 Times in 10 Posts
Rep Power: 11
HUGOSALT is on a distinguished road
Re: Yanmar 2QM15: How can I keep it running forever?

Owner of 3 GMC (raw water) for 28 years,
Cold starting: Yanmar recommends lots of throttle, as much as 3/4
then upon starting throttle down.
Rydyme flush: follow directions...upon completion must neutralize
Rydlyme with baking soda...then harden off to "good rust" by
running motor approx. 1 hour.
Excellent instructions in post by Mainesail re rydlyme flush.
Changing internal engine zincs: check every year, my experience
have not had to change every year as boat lives on fairly isolated
mooring.
Shutting down motor at end of dayhave followed since new,
recommended by Yanmar/Mack Boring...idle motor short while to cool...then run at very hi RPM's immediately before shutting down.
By following above I am still with original mixing elbow,
check it every year or so with none/minor carbon buildup.
One last point, was told years ago and follow...don't baby motor
run her hard under load. Mid range RPM's with no load will wear
more than running at max. RPM (80-85% max. rpm's)
Am quite sure that I'll be long gone and this raw water motor
will still be in service if looked after and not babied!
Hope this helps,
Hugo
Reply With Quote Share with Facebook
  #25  
Old 04-12-2013
Senior Member
 
Join Date: Sep 2012
Location: Bremerton, Washington
Posts: 184
Thanks: 4
Thanked 0 Times in 0 Posts
Rep Power: 2
Rusty123 is on a distinguished road
Re: Yanmar 2QM15: How can I keep it running forever?

The discussions on this thread, as well as some other research I've performed, has convinced me that a fresh water conversion wouldn't be worth the effort.

Casey: thanks for the detailed reports on your research. My gut confirms your position that the head shouldn't be removed just to perform routine maintenance. I'm still stumped why the manual calls for that. When you spoke to the Torreson mechanic (or anyone else), did he even acknowledge that the manual has that requirement?

Hugo: that's good gouge. I've seen most of this in other locations, but not consolidated like your post. How often do you do the Rydlyme flush?
Reply With Quote Share with Facebook
  #26  
Old 04-12-2013
Senior Member
 
Join Date: Jun 2004
Location: western LI sound, L.I., N.Y.
Posts: 446
Thanks: 1
Thanked 10 Times in 10 Posts
Rep Power: 11
HUGOSALT is on a distinguished road
Re: Yanmar 2QM15: How can I keep it running forever?

Flush with Rydlyme every few years, try to time with changing
internal engine zincs (remove before flushing or change after)...and always change/remove impeller when using Rydlyme.
or can flush if engine running hot or if raw water flow decreases.
Reply With Quote Share with Facebook
  #27  
Old 04-13-2013
Senior Member
 
Join Date: Jul 2006
Posts: 811
Thanks: 0
Thanked 16 Times in 16 Posts
Rep Power: 9
aa3jy is on a distinguished road
Re: Yanmar 2QM15: How can I keep it running forever?

As Capt. Ron once said "... Diesels love their oil like sailors love their rum.." Check and change often.
Reply With Quote Share with Facebook
  #28  
Old 04-13-2013
TQA's Avatar
TQA TQA is offline
Bombay Explorer 44
 
Join Date: Apr 2009
Posts: 2,426
Thanks: 0
Thanked 33 Times in 29 Posts
Rep Power: 6
TQA is on a distinguished road
Re: Yanmar 2QM15: How can I keep it running forever?

Quote:
Originally Posted by Rusty123 View Post
On a related topic, I notice that the service manual calls for a valve lapping every 1,000 hours. ?
Nooooooooooooooooooooooooooooooooooooooooooooooooo oooooooo

Don't do it.

Maybe just maybe it might need it at around 8000hrs.

Wait until your valve to valve seat seal is starting to leak then redo it. It will be a gradual process so the engine will get a little harder to start as the compression escapes.
Reply With Quote Share with Facebook
  #29  
Old 04-15-2013
casey1999's Avatar
Senior Member
 
Join Date: Oct 2010
Location: HI
Posts: 2,780
Thanks: 3
Thanked 16 Times in 16 Posts
Rep Power: 4
casey1999 is on a distinguished road
Re: Yanmar 2QM15: How can I keep it running forever?

Quote:
Originally Posted by Rusty123 View Post
The discussions on this thread, as well as some other research I've performed, has convinced me that a fresh water conversion wouldn't be worth the effort.

Casey: thanks for the detailed reports on your research. My gut confirms your position that the head shouldn't be removed just to perform routine maintenance. I'm still stumped why the manual calls for that. When you spoke to the Torreson mechanic (or anyone else), did he even acknowledge that the manual has that requirement?

Hugo: that's good gouge. I've seen most of this in other locations, but not consolidated like your post. How often do you do the Rydlyme flush?
The mechanic just said they do not routinely do a valve lapping. I did not question him why the manual would call for it. I have seen mistakes in the yanmar manuals concerning things like the wiring diagrams but most importantly, mistakes in the transmission oils that are called for. Sometimes the Yanmar manula will say ATF when you really need a SAE 30. Best to check the name plate of the transmission for oil type. Also, Yanmar states transmission should be left in neutral when engine off and sailing.
Reply With Quote Share with Facebook
  #30  
Old 05-13-2013
Senior Member
 
Join Date: Oct 2008
Location: Ottawa Canada
Posts: 195
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 6
weephee is on a distinguished road
Re: Yanmar 2QM15: How can I keep it running forever?

I have a 2QM15 which I'm going to replace my A4 with. I had no engine history so I had the head rebuilt and some other work done. My manual says to use ATF in the clutch housing which I have done. I've started the engine on a skid but not in the boat yet. Should I replace the ATF with SAE30. I put diesel SAE 30 in the crank case.
Thanks
Reply With Quote Share with Facebook
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On


Similar Threads
Thread Thread Starter Forum Replies Last Post
2QM15 Yanmar weephee Gear & Maintenance 5 04-06-2013 08:15 PM
Yanmar 2GM or 2QM15...? marinesniper Gear & Maintenance 20 03-10-2012 12:47 AM
Yanmar 2QM15 sundownersc Diesel 11 02-09-2012 09:21 AM
Yanmar 2QM15 repairtime Gear & Maintenance 7 12-09-2011 04:40 AM
Yanmar 2QM15 rpowell Gear & Maintenance 3 01-10-2002 08:26 PM


All times are GMT -4. The time now is 05:23 PM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012

The SailNet.com store is owned and operated by a company independent of the SailNet.com forum. You are now leaving the SailNet forum. Click OK to continue or Cancel to return to the SailNet forum.