Yanmar injector pump fail? - 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 forum dedicated to diesel engines and their applicable accessories.


Like Tree1Likes
  • 1 Post By chucklesR
Reply
 
LinkBack Thread Tools
  #1  
Old 07-23-2013
Junior Member
 
Join Date: Sep 2012
Posts: 8
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
eisselhardt is on a distinguished road
Yanmar injector pump fail?

I have a 2010 Bene 43 with a 4 cylinder, normally aspirated diesel with less than 120 hours. A couple of months ago, I was coming back from Annapolis to Balto, and began to have lots of white smoke at 2500 RPM, slightly less at lower RPM.

In dock, I checked the engine, and several of the coolant water lines were loose at their attachment points with loose hose clamps. I tightened every hose clamp on the engine (!) and the problem seemed to be solved.

Two weeks ago, returning to dock under power I had lots of white smoke again. In dock, I checked the clamps again. All tight. Checked the fuel pump. Pumping strong to the injector pump. It seems, though, that the injector pump is not pumping fuel to the injector rail.

So, do I need to replace the injector pump? Can it be re-built? I bought the boat used, and unfortunately it is out of warranty....

Thanks!
Eric
Reply With Quote Share with Facebook
  #2  
Old 07-23-2013
Senior Member
 
Join Date: Jul 2007
Location: Truckee, CA
Posts: 7,696
Thanks: 2
Thanked 110 Times in 108 Posts
Rep Power: 8
dabnis is on a distinguished road
Re: Yanmar injector pump fail?

Have you had to add coolant? If so, it appears it is finding its way into the cylinder, bad head gasket? Does it heat up? If it is running, the injector pump is probably OK? Other possibilities: Partially plugged filter(s), tank pickup partially blocked, tank not venting?

IIRC, white smoke can be coolant, assuming you have a heat exchanger.

Any recent work done on the engine?

Paul T
Reply With Quote Share with Facebook
  #3  
Old 07-23-2013
fryewe's Avatar
Senior Member
 
Join Date: Dec 2004
Location: Gulf Coast.
Posts: 1,156
Thanks: 22
Thanked 45 Times in 45 Posts
Rep Power: 10
fryewe is on a distinguished road
Re: Yanmar injector pump fail?

Quote:
Originally Posted by eisselhardt View Post
It seems, though, that the injector pump is not pumping fuel to the injector rail.
How do you know this?

If the injector pump is not pumping fuel to the injector rail your engine wouldn't start and run at all.

Do you have a temp gauge? How hot is the engine running? (If you don't have a temp gauge an inexpensive IR electronic temp instrument is worth the investment.)
__________________
“Sailors, with their built in sense of order, service and discipline, should really be running the world.” – Nicholas Monsarrat
Reply With Quote Share with Facebook
  #4  
Old 07-23-2013
chucklesR's Avatar
Senior Member
 
Join Date: Sep 2007
Location: Pasadena Md - Magothy side
Posts: 5,978
Thanks: 10
Thanked 30 Times in 30 Posts
Rep Power: 10
chucklesR is a jewel in the rough chucklesR is a jewel in the rough chucklesR is a jewel in the rough
Re: Yanmar injector pump fail?

The only way it can be the injector pump / rail is if it's been adjusted and now the timing is off. Your problem is not (can not be) that it's not pumping, but may be that it's pumping incorrectly.

White smoke is raw diesel coming through combustion unburned.
It's causes are:
bad injectors - could be one is clogged (simple to test at home).
bad timing - # 1 thing to look at, unfortunately you can't do it.
Low cylinder pressure
Cracked head / bad gaskets- water leaking in (i.e. it's steam not smoke)

Since you have a 3 year old engine which previously had a cooling water issue of loose clamps if it's not the timing issue I suggest that would be the issue. It's obvious someone has 'worked' on the engine.
kd3pc likes this.
__________________
Lessons learned are opportunities earned.
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
Help! Leaking Injector Pump Classic30 Diesel 87 03-31-2014 12:29 PM
Help! Injector Pump repair without timeframe, etc. Bene505 Diesel 10 06-11-2013 07:22 PM
yanmar 2qm15 injector pump pfirth Diesel 19 01-21-2011 12:58 AM
Diesel injector pump tbhudson Gear & Maintenance 6 12-15-2008 11:21 AM
Faulty fuel injector pump or? Eleanna Gear & Maintenance 2 10-24-2006 10:19 PM


All times are GMT -4. The time now is 09:45 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.