SailNet Community - Reply to Topic

   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 > Firing on all Cylinders?
 Not a Member? 


Thread: Firing on all Cylinders? Reply to Thread
Title:
  

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

Message:
Trackback:
Send Trackbacks to (Separate multiple URLs with spaces) :
Post Icons
You may choose an icon for your message from the following list:
 

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:

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.



Click here to view the posting rules you are bound to when clicking the
'Submit Reply' button below


Additional Options
Miscellaneous Options

Click here to view the posting rules you are bound to when clicking the
'Submit Reply' button below


Topic Review (Newest First)
07-09-2009 07:14 AM
bilgediver The slacken of the injector HP connection is the best wah and have a roll of Kitchen tissue handy to catch the drops.

This is actually best done under load so that a poorley set fuel pump doesn t mess up the experiment. IE run the engine in gear and then slacken of the connections one by one and retighten before moving to the next. If there is no change in engine note when one is slack and spraying fuel then that cylinder is not working. Next remove that injector and check you have compression in that cylinder . If lots of compression then it could be an injector problem or pump problem. If no compression then valves or rings.

You need to ensure the engine does not start so may have to slacken of the other injector connections and catch the fuel with tissue.
07-07-2009 02:34 AM
MedSailor
Quote:
Originally Posted by donradclife View Post
For free you can let the engine idle, and crack the fuel injector inlet pipes one by one. If the cylinder was firing, the engine will slow down and run rougher when you loosen the nut on the injector pipe.
A phazer toy is cool, and I LOVE another excuse to buy a tool but learning how to diagnose it with nothing more that what I have onboard is what it's really all about. THANKS!

MedSailor
07-07-2009 01:38 AM
donradclife For free you can let the engine idle, and crack the fuel injector inlet pipes one by one. If the cylinder was firing, the engine will slow down and run rougher when you loosen the nut on the injector pipe.
07-02-2009 08:01 AM
sailingdog Try here
Not laser, but infrared, only $46.
07-02-2009 12:44 AM
MedSailor
Quote:
Originally Posted by xsboats View Post
Buy a laser thermometer and point it at each cylinder head right next to the injector. If the cylinder is not firing, the temp. reading will be much lower.
That sounds like it could work AND it involves buying a new toy with the word "LASER" in the title! Seriously though, won't the block equalize in temperature quite quickly, being metal and all? Should I run the test after a set number of minutes ie during warm up?


Any suggestions on where to buy one of these phazers?

MedSailor
07-01-2009 07:45 PM
xsboats That will help diagnose your 4-108, but if your friends are saying you aren't firing on all cylinders, they probably know best!
07-01-2009 07:42 PM
xsboats Buy a laser thermometer and point it at each cylinder head right next to the injector. If the cylinder is not firing, the temp. reading will be much lower.
07-01-2009 07:36 PM
MedSailor
Firing on all Cylinders?

I've been told that I'm not firing on all cylinders.

When I bought my boat 2 years ago I had the Perkins 4-108 surveyed and the mechanic said one of the cylinders wasn't firing. He noticed at the time that we were over-propped and he figured the injectors got coked up with carbon. He said it might take an injector service to fix the problem or, if we pitched the prop down and ran it hard for a while it may just fix itself. We tried option 2. We took 3inches of pitch off the prop and ran it hard for quite a few hours, especially on a 3 week trip.

Now, I want to know how do I figure out if I'm firing on all cylinders? i.e. did I fix the problem or does it remain?

MedSailor

 
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


All times are GMT -4. The time now is 06:26 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.