No engine power - SailNet Community
 
LinkBack Thread Tools
post #1 of 6 Old 10-15-2004 Thread Starter
Senior Member
 
Join Date: Feb 2002
Location: Baltimore
Posts: 126
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 14
 
No engine power

After a couple of weeks of inactivity, my engine (Universal M25 Diesel, with a little over 1,000 hours on it), is giving me a bit of trouble. It doesn’t seem to generate any power, and I can’t get it to run more than 1,800 RPM, even under full throttle. In fairly flat water with only a bit of breeze on the beam, she barely topped 2 knots!

I also noticed that, when in gear, the exhaust contains sooty, oily water. With the transmission in idle, the exhaust water is fairly clean, though. There isn''t any excessive smoke either.

Any ideas what the problem can be? Thanks for your help!
zeilfanaat is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #2 of 6 Old 10-15-2004
Senior Member
 
paulk's Avatar
 
Join Date: Jun 2000
Location: CT/ Long Island Sound
Posts: 2,609
Thanks: 4
Thanked 26 Times in 25 Posts
Rep Power: 16
 
No engine power

First thing I think of is clogged injectors. If you''re not getting enough fuel into the cylinders, you''re not going to get any power and you''re not going to be boosting rpm either. At idle, less excess fuel is showing up in the exhaust because there''s less fuel being pushed -- you''re in idle. Under load, with more fuel being sent in but not getting through properly, it''s showing up in the exhaust.
My $0.015 ( I don''t know enough to call it two cents.)
paulk is offline  
Quote Quick Reply Share with Facebook
post #3 of 6 Old 10-16-2004
Junior Member
 
Join Date: Oct 2004
Posts: 2
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
No engine power

Yes, look at the fuel system. I suspect that you have air or an air leak in the fuel line or the return lines. This often happens when you leave the boat for a period of time. Check the filters and the lines for leaks and bleed the system. Check and make sure that your fuel is clean -- dip a stick in the tank and see if there is any microbial growth at the bottom of the tank. This looks like slime. If there is microbial growth, then it has probably clogged your secondary filter.
Sludgemaster is offline  
Quote Quick Reply Share with Facebook
post #4 of 6 Old 10-16-2004
Member
 
Join Date: Nov 2002
Posts: 57
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 13
 
No engine power

Agreed. I would change the filters first and see if that corrects the problem. If it does then go after the fuel and find out what is causing the clog. If not, then move on to the injectors. If you pull them and take them to be tested make sure you keep the holes in the motor clean and protected.
Yodagwb is offline  
Quote Quick Reply Share with Facebook
post #5 of 6 Old 11-06-2004
Member
 
Join Date: Feb 2004
Posts: 69
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 12
 
No engine power

Could be watery fuel, possibly due to condensation in the tank. Test by running the fuel pump intake line to a container of clean, fresh fuel, and the discharge line directly to the injector pump, bypassing the secondary filter. If that cures it, discard everything in the regular tank, keep it topped off, use a dispersal agent and a biocide, and check for water in the tank with Water Probe Indicator.
elhanley is offline  
Quote Quick Reply Share with Facebook
post #6 of 6 Old 11-15-2004
Junior Member
 
Join Date: Aug 2004
Posts: 21
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
No engine power

You may also check to see if there is something wrapped on your prop. I was on a boat that had that problem - a random line was braided in the prop, but it would still spin.

No speed, no rpm and lots of black junk in the exhaust.
GarrettK 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
OMC Saildrive engine loss of power muckitymuc Gear & Maintenance 7 09-29-2009 09:43 AM
Cruising Power Boat - Advice Needed m000ve0ver Boat Review and Purchase Forum 2 12-24-2003 10:47 AM
engine losing power newuser Gear & Maintenance 5 06-06-2002 09:00 AM
Raw Water in Engine wmwtlw Gear & Maintenance 3 02-25-2001 11:31 AM
Inflatable engine power WillS General Discussion (sailing related) 0 01-13-2001 05:06 PM

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