engine trouble - SailNet Community
 
LinkBack Thread Tools
post #1 of 9 Old 01-23-2008 Thread Starter
Junior Member
 
Join Date: Nov 2007
Posts: 5
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
engine trouble

hello everybody
since first time i had problem and thanks to people here had fixed i have been enjoying my stay in my Catalina and doing lot of sailing in the bay of Banderas,but now i have problem. Water stopped coming out of the exaust. I trace the water intake and i opened the oberdorfer pump and the impeller is fine but i a gasket is missing and some (a bit ) water is leaking ,could this be the problem or i have to go further and open the heat exchanger which frankly im not sure how it works. pls if someone can shed a bit of info or some diagrams of the engine i will be much obliged!
Respect
Marino
marinoinPV is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #2 of 9 Old 01-23-2008
Senior Member
 
chucklesR's Avatar
 
Join Date: Sep 2007
Location: Pasadena Md - Magothy side
Posts: 5,979
Thanks: 10
Thanked 31 Times in 31 Posts
Rep Power: 10
     
For leaking fix/replace the gasket and no that's not your problem.
You've got to tell us what type engine you have, whether or not the seacock for raw water is for sure open, if you have a strainer and whether of not it's clear, we can't help without a lot more information.

In the meantime - check your seacock and strainer, after the impeller those are your most likely problems.
chucklesR is offline  
Quote Quick Reply Share with Facebook
post #3 of 9 Old 01-23-2008
Senior Member
 
Join Date: Sep 2006
Location: Scotland
Posts: 2,364
Thanks: 0
Thanked 11 Times in 11 Posts
Rep Power: 9
 
Are you getting water to the impeller?
Sometimes a plastic bag outside the hull can stop the flow entirely.
It happened to me.
Rockter is offline  
Quote Quick Reply Share with Facebook
post #4 of 9 Old 01-23-2008
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
         
It would help if you said what engine and boat you had, and how it was setup... Might also want to read this post to get a bit more info on how to get the most of the time you spend here.

The seacock and strainer are probably the problem... and should be checked first. You do have a big bronze raw water strainer, right???

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 #5 of 9 Old 01-23-2008
Senior Member
 
chucklesR's Avatar
 
Join Date: Sep 2007
Location: Pasadena Md - Magothy side
Posts: 5,979
Thanks: 10
Thanked 31 Times in 31 Posts
Rep Power: 10
     
Catalina 30, so either the universal M25 or the 12hp. My buddies m25 came with no strainer - f'in Catalina saving a buck.

If you popped the pump face plate for the impeller and found no problem you either closed the seacock before hand, in which case you know if it was closed/open before - or if you didn't close the seacock and opened the water pump and the boat didn't sink then you have a blockage elsewhere before the pump.
If the seacock to the raw water is open, close it (handle down tight against the hull). Disconnect the hose leading from the seacock to either the stainer if one is installed, or the pump if not and check it for flow (blow air through it)- if that hose is clear - quickly crack open the seacock just a fraction and see if water shoots in, then close it. If water came in the thru hull is okay, if not you have a blockage on the outside that needs to be cleared away.
If water came in from the seacock, and the hose from the seacock was clear follow that path to all the way to the pump (including the strainer if one is installed) to ensure that it's open to water flow (blow air if needed to make sure it's open) one step at a time; reassembling as you go.
If you find a blockage clear it or replace the hose with a properly rated replacement hose.


When done DON'T just open the seacock and go, carefully check for leaks and fix them before you go topside to start the engine. If it leaks without the engine running it will gush once the pump cranks up.



If the water path to the pump is all clear it gets more complicated - come back for more input then.

Last edited by chucklesR; 01-23-2008 at 11:08 AM.
chucklesR is offline  
Quote Quick Reply Share with Facebook
post #6 of 9 Old 01-23-2008
Moderator
 
JohnRPollard's Avatar
 
Join Date: Mar 2007
Location: Chesapeake
Posts: 5,680
Thanks: 0
Thanked 4 Times in 3 Posts
Rep Power: 10
     
Quote:
Originally Posted by marinoinPV View Post
hello everybody
since first time i had problem and thanks to people here had fixed i have been enjoying my stay in my Catalina and doing lot of sailing in the bay of Banderas,but now i have problem. Water stopped coming out of the exaust. I trace the water intake and i opened the oberdorfer pump and the impeller is fine but i a gasket is missing and some (a bit ) water is leaking ,could this be the problem or i have to go further and open the heat exchanger which frankly im not sure how it works. pls if someone can shed a bit of info or some diagrams of the engine i will be much obliged!
Respect
Marino
Marino,

By "oberdorfer pump" are you referring to the raw water pump (i.e. the one that pulls water from outside the boat and pushes it through the heat exchanger)?

If the gasket to your raw water pump is missing, and the pump is dripping, then I would suspect the pump is sucking air due to the bad seal from the missing/worn gasket. If any air is being sucked in at the pump, it will lose suction and not draw the raw water in. My advice would be to replace the gasket as a first step, to stop the leak and seal the pump so it won't pull any air in. Then move on to the other suggestions above. Good luck.
JohnRPollard is offline  
Quote Quick Reply Share with Facebook
post #7 of 9 Old 01-23-2008
Special Delivery
 
speciald's Avatar
 
Join Date: Mar 2007
Location: live on boat
Posts: 661
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 9
 
Send a message via Skype™ to speciald
Most water pumps have a weap hole that will drip if the seals in the back of the pump are worn and need replacement. This is another source of the drip. If the pump still drips after replacing the gasket,check the pump manufacture's web site for an exploded view of the pump and the part # for the seals - usually two.
speciald is offline  
Quote Quick Reply Share with Facebook
post #8 of 9 Old 01-23-2008
Courtney the Dancer
 
jrd22's Avatar
 
Join Date: Nov 2000
Location: San Juan Islands., WA, USA
Posts: 3,885
Thanks: 4
Thanked 22 Times in 21 Posts
Rep Power: 15
 
I agree with JohnPollard above. If the gasket on the raw water pump is leaking it can and will suck air in and possibly fail to draw water in. Put some sealant on it and try again, if it still does not prime follow the other instructions that have been given here. Start at the seacock and make sure you are getting water, then check strainer and on through the system.

Good luck, John

John
SV Laurie Anne

1988 Brewer 40 Pilothouse

jrd22 is offline  
Quote Quick Reply Share with Facebook
post #9 of 9 Old 01-23-2008
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
     
1. Remove input hose from pump to insure water is getting to it. If not...clean out hose and through hull.
2. Remove hose from pump to heat exchanger...turn engine on briefly to unsure pump is pumping water. If not ...replace pump gasket and replace impeller while you are at it. Try again.
3. If you now have good flow out of the pump but not out the back of the boat...the you have a blockage in the heat exchanger or mixing elbow, which should be removed and cleaned.

No longer posting. Reach me by PM!
camaraderie 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
Runaway Diesel Engine Ben Hilke Gear and Maintenance Articles 0 07-19-2004 08:00 PM
Caring for the Cruising Outboard Doreen Gounard Gear and Maintenance Articles 0 04-22-2003 08:00 PM
Surveying a Diesel Engine Tom Wood Buying a Boat Articles 0 01-26-2003 07:00 PM
Surveying a Diesel Engine Tom Wood Gear and Maintenance Articles 0 01-26-2003 07:00 PM
Replacing the Diesel Engine Sue & Larry Gear and Maintenance Articles 0 06-12-2000 08:00 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