SailNet Community - Reply to Topic
Thread: reduced exhaust water Reply to Thread
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:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


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.

  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)
08-07-2007 08:36 PM
rsford Thanks for the suggestions.
07-27-2007 07:07 AM
SailorMitch There also could be a blockage in the exhaust elbow. Need to remove and clean that if you have no idea when it was last done. I'd check that before I'd check the heat exchanger.
07-27-2007 12:16 AM
sailaway21 Discharge of which upon the navigable waters of the US will earn you a $10,000 fine. But it will probably work.(g)
07-26-2007 05:22 PM
camaraderie First step is making sure you have full flow of water between the through hull and the perko filter. Often barnacles, kelp, plastic can restrict water flow. Liquid plumber won't help...but often a dive overboard with a long screwdriver and/or coathanger can dislodge whatever is restricting the flow.
If that is not the problem...and you think the impeller is good...check the flow by removing the connecting hose for a few seconds with the engine running. If that check is on to the heat exchanger I'm afraid but it is NOT that difficult a job. Alternatively to removing the exchanger if you are pretty sure the blockage is NOT a piece of to use muriatic acid solution at the engine intake and let it run through until you see it coming out the exhaust...let it sit for a few minutes and then flush it thorugh by running the engine normally. That will often clear the pipes. Otherwise they need to be reamed out physically.
Good luck.
07-26-2007 02:10 PM
reduced exhaust water

Any ideas about cleaning out the Yanmar diesel heat exchanger on a PSC 37? When the engine is running, seawater still come out the exhust, but it's a lot smaller volume than formerly. I've cleaned out the thru-hull for the seawater intake as well as the seawater strainer. With the seawater pump cover off and the intake line open, seawater flows out freely at the open pump. I've also replaced the seawater pump impeller even though the old one looked fine.

I'm concerned that, despite the above actions, the volume of exhaust water remains diminished, even though the engine has not yet over- heated. In case marine growth built up during a period of disuse, I've wondered about pumping Liquid Plummer into the seawater inlet of the exhanger for a little while and then flushing it out. Removing the heat exhanger looks like rather serious engine work to me, so I was hoping for a simpler fix. Thanks.

Bob Ford
s/v Talos IV, 1995 PSC 37 #306

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 Off

For the best viewing experience please update your browser to Google Chrome