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 > Yanmar Heat Exchanger Problem?
 Not a Member? 


Thread: Yanmar Heat Exchanger Problem? 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)
05-06-2008 10:00 PM
beej67 I missed this part earlier:

Quote:
No exhaust either.
If there's no water and no exhaust and your engine compartment is getting warm, then the pipe to/from your muffler, or the muffler itself, is broken/loose. Or the pipe between the mixing elbow and the radiator has come loose, and the exhaust is coming out that. By hook or crook you've either got a loose hose, or a busted muffler, and the stuff that's supposed to be coming out your tailpipe is discharging freely in your engine compartment. That's good news, because a loose hose is free to fix, and a busted muffler is cheaper than engine parts.

From personal experiences, mufflers are a major pain in the rear to fix, and hiring someone is a great idea. It's a real simple issue, congratulate yourself on diagnosing the problem, and have a beer while someone else fixes it. Particularly if the boat isn't where you are. But it could be something as simple as a hoseclamp come loose, so if you can't fit down to fix it, get your wife to do it. Might save you some labor.
05-06-2008 07:51 PM
AlanBrown BJ,

You didn't sound snarky.

I crawled down into the quarter berth with a flashlight and couldn't see the source of the leak. If I had more time my next step would have been to empty out the cockpit storage locker and try to fit my 6'2", 300 lb. body down into that small space to take a look from a different angle. Thank goodness I had a ferry to catch to Green Turtle Cay!

Now grabbing some overtime hours to pay some skinny dude to crawl down in there and fix things. Self-reliance has it's limits. Money doesn't.

Thanks for your suggestions.
05-06-2008 10:05 AM
beej67
Quote:
Originally Posted by AlanBrown View Post
Recently experienced a problem with my 1981 Hunter's Yanmar 2GM. Here's what happened.

Started engine and only got 1/2 the normal flow of water out the exhaust. Checked raw water inlet and strainer. All clear.

Noticed stream of warm water flowing out of engine compartment into bilge, but engine ran fine.

Water stopped coming out with exhaust. No exhaust either. Engine compartment got quite warm.

I suspect that the heat exchanger finally bit the dust. Your thoughts and suggestions.

Boat is back in the Bahamas, so I can't do any personal troubleshooting from here.

Many thanks!
If the engine's not overheating, it's probably not the heat exchanger.

Sounds to me like the hose between the heat exchanger and the mixing elbow came loose. I'd check that first. Second thing I'd check is carbon buildup in the mixing elbow itself. Third thing I'd check is to see if your muffler's leaking.

Check the easy stuff first.

Hate to sound snarky, but have whoever's got your boat crank it and look in the compartment to see where the water's gushing out of. Chances are that's the source of the water.
05-03-2008 10:14 PM
lbdavis It could be the mixing elbow itself. These corode and need to be replaced fairly often.
05-03-2008 09:52 PM
Faster A number of things come to mind...

Your water line to the mixing elbow may have come adrift...

Water pump failed (possible overheating)

Heat exchanger plugged badly, as you suspect.

Not sure what you mean by "no exhaust either" - while engine was still running??? Inside the boat was hot, was it fumey too? Could you smell exhaust gases down there?Is the exhaust hose from the water lift to the outlet intact?

Sounds nasty....
05-03-2008 08:14 PM
AlanBrown
Yanmar Heat Exchanger Problem?

Recently experienced a problem with my 1981 Hunter's Yanmar 2GM. Here's what happened.

Started engine and only got 1/2 the normal flow of water out the exhaust. Checked raw water inlet and strainer. All clear.

Noticed stream of warm water flowing out of engine compartment into bilge, but engine ran fine.

Water stopped coming out with exhaust. No exhaust either. Engine compartment got quite warm.

I suspect that the heat exchanger finally bit the dust. Your thoughts and suggestions.

Boat is back in the Bahamas, so I can't do any personal troubleshooting from here.

Many thanks!

 
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 06:12 AM.

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.