Return to the home page...

Go Back   Moyer Marine Atomic 4 Community - Home of the Afourians > Discussion Topics > Cooling System

Reply
 
Thread Tools Display Modes
  #1   IP: 64.180.64.7
Old 11-10-2015, 11:05 AM
Marty Levenson Marty Levenson is offline
Senior Member
 
Join Date: Nov 2004
Location: Bowen Island, BC
Posts: 679
Thanks: 91
Thanked 42 Times in 36 Posts
FWC cranking question

Hope this isn't a dumb question!

Since converting to FWC I have been wondering about the best procedure if startup needs extra cranking. With RWC I understand the need to shut off the water intake if she doesn't fire up after a few tries, but doing that isn't going to affect water getting into the engine with FWC.

I have the Indigo system: electric coolant/fresh water pump and A4 water pump to circulate sea water.

Thanks!
Marty
__________________
Marty
1967 Tartan 27
Bowen Island, BC

Reply With Quote
  #2   IP: 161.213.49.150
Old 11-10-2015, 11:23 AM
JOHN COOKSON JOHN COOKSON is offline
Afourian MVP, Professor Emeritus
 
Join Date: Nov 2008
Posts: 3,500
Thanks: 54
Thanked 855 Times in 629 Posts
Raw water can back up into the exhaust part of the manifold and into the engine when there is no exhaust pressure to force it out of the exhaust system.

TRUE GRIT
Reply With Quote
The Following User Says Thank You to JOHN COOKSON For This Useful Post:
Marty Levenson (11-10-2015)
  #3   IP: 216.115.121.240
Old 11-10-2015, 12:05 PM
lat 64's Avatar
lat 64 lat 64 is offline
Afourian MVP
 
Join Date: Oct 2008
Location: Fairbanks, Alaska
Posts: 1,964
Thanks: 39
Thanked 240 Times in 157 Posts
Marty,

The exception to that is only if you have a dry water-jacketed exhaust all the way back to the through-hull.
Take a long look at your system and suss out the paths of the water and exhaust. Get familiar with just exactly where the sea water gets injected to cool off the exhaust in the exhaust pipe.
Short of that, when in doubt; use the standard procedure to crank engine. That is, if it does NOT fire right away, close seacock and get it started, then IMEDIATELY open seacock for engine heat exchanger and exhaust mix water.
__________________
Whiskeyjack a '68 Columbia 36 rebuilt A-4 with 2:1

"Since when is napping doing nothing?"
Reply With Quote
The Following User Says Thank You to lat 64 For This Useful Post:
Marty Levenson (11-10-2015)
  #4   IP: 73.27.138.11
Old 11-10-2015, 12:25 PM
romantic comedy's Avatar
romantic comedy romantic comedy is offline
Afourian MVP
 
Join Date: May 2007
Location: florida
Posts: 1,912
Thanks: 13
Thanked 118 Times in 100 Posts
I see you have a T 27. I have a T 34 with a stand pipe. If you do too, then you can crank away with no fear of water in the engine.

As always, pictures of the exhaust will help
Reply With Quote
  #5   IP: 24.152.132.65
Old 11-10-2015, 05:02 PM
ndutton's Avatar
ndutton ndutton is offline
Afourian MVP
 
Join Date: May 2009
Location: Torrance, CA
Posts: 9,619
Thanks: 198
Thanked 2,208 Times in 1,425 Posts
As described by RC and Lat64, the answer to your question is dependent on the type of exhaust system.
__________________
Neil
1977 Catalina 30
San Pedro, California
prior boats 1987 Westsail 32, 1970 Catalina 22
Had my hands in a few others
Reply With Quote
  #6   IP: 132.147.29.249
Old 11-11-2015, 05:20 PM
joe_db's Avatar
joe_db joe_db is online now
Afourian MVP
 
Join Date: May 2009
Posts: 4,474
Thanks: 49
Thanked 1,026 Times in 721 Posts
FYI:
FWC vs. RWC makes no difference at all to exhaust flooding unless you have a dry exhaust. I am in the middle of switching and the salt water dumps in the exhaust at the same rate and the same place as before.
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Cranking raw water cooled the engine too much then vapor or smoke redtim Exhaust System 41 05-07-2015 05:44 PM
Hand cranking an A-4 wristwister General Interest 1 04-24-2014 12:34 PM
RPM at Idle Question jwilson1515 Troubleshooting 19 01-26-2012 11:36 AM
Another Catalina 30/A4 Question MarkG Troubleshooting 9 08-04-2010 12:51 PM
Oil Capacity Question Jim S General Maintenance 3 10-14-2007 09:57 PM


All times are GMT -4. The time now is 02:19 PM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2024, vBulletin Solutions, Inc.


Universal® is a registered trademark of Westerbeke Corporation

Copyright © 2004-2024 Moyer Marine Inc.

All Rights Reserved