Atomic 4 Exhaust Elbow - Page 2 - SailNet Community

   Search Sailnet:

 forums  store  

Quick Menu
Boat Reviews  
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Hatches and Portlights
Interior And Galley
Marine Electronics
Other Items
Plumbing and Pumps
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here

Go Back   SailNet Community > On Board > Gear & Maintenance
 Not a Member? 
Old 12-24-2008
Senior Member
Join Date: Jul 2008
Posts: 140
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 7
floatsome is on a distinguished road
Be careful to follow key principles when replacing an A4 exhaust system, noting the waterline, height of exhaust components above the waterline, and risk of back-flooding the A4 cylinders through the manifold.
Good Old Boat: Cool and Quiet and Trouble Free by Jerry Powlas and Dave Gerr
Exhaust Risers - Marine Engines : Boats and Yachts Maintenance, Repairs and Troubleshooting :

Not all installation ideas pertain to all A4s in all sailboat designs.
Reply With Quote Share with Facebook
Old 12-24-2008
Senior Member
Join Date: Aug 2007
Posts: 306
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 8
thekeip is on a distinguished road
Starboard side access can be problematic but less so than before the 'operation'.
The pics were labled so I could find them conveniently in my photo library and may have been misleading. What I wanted to show was the install of the water cooled elbow. Floatsome's advice is well taken. The only mishap I ever had with the design was filling the crankcase with water when the engine failed to start but I continued to crank anyway, and the water pump simply continued to pump too, and it was a mess. Now I don't open the water intake valve until the engine is running. Has been working well for 25 yrs or so.
Howard Keiper
Reply With Quote Share with Facebook
Old 12-25-2008
Ben Dover
Join Date: Feb 2008
Location: San Diego
Posts: 5
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
steich is on a distinguished road
THANKS ALL!!! Moyer Marine is exactly the store I was looking for. I am going to replace the whole exhaust and for super cheep compared to what I had originally thought it was going to cost. This website is invaluable. Moyer Marine has just the stuff I'm looking for at reasonable prices. I really appreciate everyone's help. My only question is if I use their water injection that injects the water below the exhaust, is there any risk of it sucking back into the exhaust manifold? I'm pretty sure the awnser is no, but any insight is welcome. Thanks again all who replied!

Reply With Quote Share with Facebook
Old 12-26-2008
Senior Member
Join Date: Jul 2008
Posts: 140
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 7
floatsome is on a distinguished road
Ben, any coolant injection point, regardless of the way it is made (I have a Moyer inline coolant injection fitting that I am about to install in our rebuilt exhaust elbow using galvanized pipe), has to be far enough over the top and on the downside of the elbow to reduce the risk of coolant water backfilling the manifold. The links I provide above discuss the design principles, then the owner has to ensure the design meets the principles. Checking with owners of the same boat whose exhausts are working fine helps too.
Reply With Quote Share with Facebook

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools

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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Atomic 4 exhaust Robertjulius Catalina 3 01-21-2013 11:58 PM
Any Gearhead's? Capnblu Sailboat Design and Construction 40 11-23-2008 06:58 PM
exhaust water injection elbow wescarroll Gear & Maintenance 1 08-17-2008 07:18 PM
Atomic 4 Exhaust fbycericson Ericson 5 02-07-2008 02:05 PM
Exhaust mixing elbow I-33 Gear & Maintenance 2 12-02-2006 03:24 PM

All times are GMT -4. The time now is 12:17 PM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) LLC 2000-2012

The store is owned and operated by a company independent of the forum. You are now leaving the SailNet forum. Click OK to continue or Cancel to return to the SailNet forum.