Atomic 4 Exhaust issues - 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 > Engines > Gas > Atomic 4
 Not a Member? 
Old 06-01-2009
Junior Member
Join Date: Jun 2009
Posts: 1
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
HarryGaupt is on a distinguished road
Unhappy Atomic 4 Exhaust issues

I recently took possesion of a one owner 1968 Columbia 28 with an Atomic 4 gas engine. Not been in the water in 4+ years, sketchy maintenance prior to that. Ran garden hose to water pump. Soon after, discovered water exiting via all four cylinders (thru spark plug holes). Isolated the block cooling from the exhaust cooling. No water exiting the spark plugs when connected to block only (thru bell housing with thermostat removed). From this I assume the head gasket is ok.

Connected to the exhaust cooling and got water out of the cylinders again. From this I assume the "pipe in a pipe" rusted thru so the water inside the exhaust manifold is leaking out of the pipe and filling the manifold.

I am guessing that I may not be the first Atommic 4 owner to see this.

So... Where do I go next?

Can I run safely with the cooling to the exhaust manifold itself bypassed?

Since we plan to sail in Naragansett Bay (where the water is cold), I'm told the Atomic 4 will benefit from a little less cooling (I understand there are aftermarket kits which reduce the water flow thru the engine just to increase engine temp).

For those who may not be familiar with the Columbia design, the engine compartment was designed by a sailor who assumed that the engine would never need maintenance and, therefore, you only needed access to the top side of the engine.

Many humble thanks for any guidance.
Reply With Quote Share with Facebook
Old 06-01-2009
deniseO30's Avatar
Move over Joan Rivers!
Join Date: Nov 2006
Location: Bristol pa
Posts: 6,196
Thanks: 52
Thanked 93 Times in 83 Posts
Rep Power: 9
deniseO30 will become famous soon enough deniseO30 will become famous soon enough
Sounds like bad news! BTW, most of us never directly connect the water pump to the garden hose. we put the intake in a bucket and run the hose water into it. Moyer is the Guru of the A4 and best source for all your parts and rebuilds.
Good luck!

Moyer Marine Atomic 4 Engine Rebuilding and Parts
Denise, Bristol PA, Oday 30. On Tidal Delaware River, Anchor Yacht Club. New Website!
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

My boat is for sale.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
Old 08-26-2009
Junior Member
Join Date: Aug 2009
Posts: 12
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
Pater is on a distinguished road
Don Moyer has a simple method for checking cooling systems with a bicycle pump and a pair of schrader valves. go to Moyer Marine and ask. A great resource for Atomic Four owners.
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
Atomic 4 Exhaust fbycericson Ericson 5 02-07-2008 02:05 PM
1976 Irwin 37 cc with exhaust issues. Irwin37mkIV Gear & Maintenance 1 08-02-2007 11:37 PM
Atomic 4 exhaust dlahlers Gear & Maintenance 1 10-18-2001 01:18 PM

All times are GMT -4. The time now is 07:29 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) 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.