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 > It Usually Means Something
 Not a Member? 


Thread: It Usually Means Something 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)
12-09-2011 12:30 PM
WanderingStar Probably because the engines, while quite similar, have very different exhaust sytems.
12-08-2011 12:04 PM
svHyLyte
Quote:
Originally Posted by WanderingStar View Post
The raw water system should be protected by zincs. Many heat exchangers have one, mine doesn't. There is a zinc in the transmission where seawater first meets steel. There is one at the other end of the sytem where the seawater goes into the exhaust. I think this makes sense, the exhaust zinc shows some decay. I also think that the water stands there all the time, unless the system is drained. Of course, I could be wrong. But I don't change anything that seems to work.
If it "ain't" broke, don't fix it (of course). We evidently have a slightly different system on a 4-108 which does not have a zinc in the mixing elbow, hence my question. On our engine, unless it's running, there is no water in the mixing elbow although the heat exchanger does, of course, retain some water. N'any case, I'm glad you were able to get things working properly again.

Cheers...
12-07-2011 12:06 AM
WanderingStar The raw water system should be protected by zincs. Many heat exchangers have one, mine doesn't. There is a zinc in the transmission where seawater first meets steel. There is one at the other end of the sytem where the seawater goes into the exhaust. I think this makes sense, the exhaust zinc shows some decay. I also think that the water stands there all the time, unless the system is drained. Of course, I could be wrong. But I don't change anything that seems to work.
12-04-2011 11:36 AM
svHyLyte
Quote:
Originally Posted by WanderingStar View Post
Sorry Caleb, I lack computer skills, and a digital camera! The deposit was like gritty brown mud, but hard enough in spots to be difficult to scrape out with a screwdriver. I'm going to try boiling it out. The zinc may have added to the problem. It left room in the pipe-t where it was installed, but was long enough to nearly obstruct the pipe nipple screwed into the other end. I cut the zinc in half. A test run now showed plenty of water from the exhaust. Then I reassembled it with sealant. Now I just hope that when I run it tomorrow it doesn't drip.
Perhaps I'm just dense but I do not understand the need of a zinc in a mixing elbow. A zinc might be important where there is constant exposure to water but the mixing elbow generally only has water in it when the engine is running. Why then a zinc?
12-04-2011 10:48 AM
WanderingStar Sorry Caleb, I lack computer skills, and a digital camera! The deposit was like gritty brown mud, but hard enough in spots to be difficult to scrape out with a screwdriver. I'm going to try boiling it out. The zinc may have added to the problem. It left room in the pipe-t where it was installed, but was long enough to nearly obstruct the pipe nipple screwed into the other end. I cut the zinc in half. A test run now showed plenty of water from the exhaust. Then I reassembled it with sealant. Now I just hope that when I run it tomorrow it doesn't drip.
12-03-2011 02:40 AM
CalebD Good news on finding the exhaust mixing elbow. Problem (nearly) solved.
Any pics of buildup in the old fitting?
12-02-2011 11:00 PM
WanderingStar Early middle age, but young at heart, I hope.
12-02-2011 09:26 PM
svHyLyte
Quote:
Originally Posted by WanderingStar View Post
Your suspicions are correct. I removed the exhaust elbow today, it's blocked. I have a seperate side discharge hose, water flows from it nicely when I poen that valve. The injection elbow is simply made of galvanized pipe fittings, I should be able to assemble a new one at the hadware store. I'll clean the old one and keep it as a spare. Of course, it took some thought and parts gyration to remove. I managed to break the adjacent fuel return line. Then a starling crapped right down the back of my neck. (I have a deck hatch to the engine space) I guess that's good luck (both).
Great news. An easy--'though evidently crappy--fix. (Unless, of course, that was a Bird of Paradise!) Hopefully you are a young man so that you can enjoy the benefit of this experience for a long time.

Take care, keep well, and good sailing(/motoring?)
12-02-2011 05:10 PM
WanderingStar Your suspicions are correct. I removed the exhaust elbow today, it's blocked. I have a seperate side discharge hose, water flows from it nicely when I poen that valve. The injection elbow is simply made of galvanized pipe fittings, I should be able to assemble a new one at the hadware store. I'll clean the old one and keep it as a spare. Of course, it took some thought and parts gyration to remove. I managed to break the adjacent fuel return line. Then a starling crapped right down the back of my neck. (I have a deck hatch to the engine space) I guess that's good luck (both).
12-02-2011 11:23 AM
svHyLyte
Quote:
Originally Posted by WanderingStar View Post
Shouldn't be the heat ex, I took it apart in spring, it was all clear. The leaking line went to the exhaust elbow, I'm suspicious there. In fact I wonder if the new zinc may have been enough longer than the old to partially block the flow. I hope to check today.
Given everything you've said and done, and the absence of water flow through the exhaust, it would seem that the injection nozzle is obstructed. We have a friend that experienced a similar problem with his engine during a cruise to Key West last year. When he finally limped in and his engine cooled, we pulled the injection nozzle to discover all but a tiny hole left due to carbon/salt build-up. An hour with a Drummel tool followed by several hours of soaking in a solution of fresh water and Saltaway cleared it enough to allow him to make it back to Tampa Bay without difficulty. He probably could have continued to use the nozzle for awhile but elected to replace it once he got home. We have found that one of the best sources for parts is Transatlantic Diesel ("TAD") although I'm sure there is no shortage of other suppliers in the northeast.

Good Luck!

PS: If you elect to clear the nozzle with a Drummel tool, wear eye protection!
This thread has more than 10 replies. Click here to review the whole thread.

 
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 11:20 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.