Return to the home page...

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

Reply
 
Thread Tools Display Modes
  #1   IP: 50.253.249.57
Old 08-08-2019, 01:20 PM
SailingReckless's Avatar
SailingReckless SailingReckless is offline
Senior Member
 
Join Date: Oct 2018
Location: Clio, MI
Posts: 29
Thanks: 20
Thanked 1 Time in 1 Post
Exclamation HELP Water in carburetor!

Just took off my carburetor to take it in to have someone look at it and it was full of water! I know the fuel supply from the mechanical fuel pump is good clean fuel. Does that mean that the water is entering from the manifold? When I put the boat in the water this year I got it to runSo i suppose obviously I have water intrusion. Can anybody walk me through how to run it down and find out where its coming from? I did earlier post of video of the exhaust smoking and was advised that it was steam from water getting in somewhere it shouldn't be!
Reply With Quote
  #2   IP: 205.178.112.53
Old 08-08-2019, 01:44 PM
Antibes's Avatar
Antibes Antibes is offline
Senior Member
 
Join Date: Jun 2011
Location: Chicago, IL
Posts: 120
Thanks: 8
Thanked 26 Times in 22 Posts
Post from 2007.
http://www.moyermarineforum.com/foru...ead.php?t=1319
Reply With Quote
  #3   IP: 24.152.132.140
Old 08-08-2019, 03:45 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
Quote:
Originally Posted by SailingReckless View Post
I know the fuel supply from the mechanical fuel pump is good clean fuel.
HOW do you know?
__________________
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
  #4   IP: 97.93.70.7
Old 08-08-2019, 04:56 PM
Dave Neptune Dave Neptune is offline
Afourian MVP, Professor Emeritus
 
Join Date: Jan 2007
Location: Grove, Oklahoma
Posts: 5,035
Thanks: 711
Thanked 1,289 Times in 839 Posts
If indeed the fuel being supplied is free of water then the first test is to pressure check the manifold. It can be done in place. Many links on this site for testing instructions.

Dave Neptune
Reply With Quote
The Following User Says Thank You to Dave Neptune For This Useful Post:
SailingReckless (08-09-2019)
  #5   IP: 50.253.249.57
Old 08-09-2019, 12:59 AM
SailingReckless's Avatar
SailingReckless SailingReckless is offline
Senior Member
 
Join Date: Oct 2018
Location: Clio, MI
Posts: 29
Thanks: 20
Thanked 1 Time in 1 Post
I disconnected the fuel line from the carburetor and manually pumped out fuel into a jar and it was clean.
Reply With Quote
  #6   IP: 24.152.132.140
Old 08-09-2019, 03:15 AM
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
Quote:
Originally Posted by SailingReckless View Post
I disconnected the fuel line from the carburetor and manually pumped out fuel into a jar and it was clean.
I had to ask. You'd be surprised how many times someone says, "I know such and such is good" only to find several tests and days later it wasn't.

I'm looking forward to the results of your manifold pressure test.
__________________
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
  #7   IP: 137.103.82.227
Old 08-09-2019, 09:35 AM
joe_db's Avatar
joe_db joe_db is offline
Afourian MVP
 
Join Date: May 2009
Posts: 4,474
Thanks: 49
Thanked 1,026 Times in 721 Posts
One way this can happen is a poorly designed or defective exhaust flooding the engine.
Reply With Quote
  #8   IP: 97.93.70.7
Old 08-09-2019, 10:18 AM
Dave Neptune Dave Neptune is offline
Afourian MVP, Professor Emeritus
 
Join Date: Jan 2007
Location: Grove, Oklahoma
Posts: 5,035
Thanks: 711
Thanked 1,289 Times in 839 Posts
Reckless, you say the carb was full of water, can you give a bit of a description please. Was it in the bowl and if so how full of water? Or was it just water in the throat of the carb? Or did the carb just "show" water damage?

If you were out on the water and the boat was ah rockin the pump could suck some water off the bottom intermittently and still show a "clear of water" check when sitting still. It can happen so diagnosing one thing at a time is NECESSARY.

Check the manifold, if good THEN check the exhaust for syphoning back to the manifold. If water is "syphoning back" you should also see a "rise" in oil level or milky looking oil. If the oil level has risen the water can be sucked off the bottom before mixing with the oil for easier flushing. If no milky oil do look to a serious pressure check of the manifold.

Dave Neptune

Last edited by Dave Neptune; 08-09-2019 at 10:19 AM. Reason: oops
Reply With Quote
  #9   IP: 207.118.20.35
Old 08-09-2019, 01:02 PM
capnward's Avatar
capnward capnward is offline
Afourian MVP
 
Join Date: Aug 2012
Location: Deer Harbor WA
Posts: 335
Thanks: 41
Thanked 147 Times in 107 Posts
For checking the manifold, I've heard of two ways. One is to get a fitting for a Schrader valve like on tires, and a bicycle pump with a pressure gauge. Close off the other end of the manifold. Pressurize the manifold to (I believe) 20 psi, and if it holds that pressure for a long time you're ok. The other way is to blow through a hose in one end while the other end is closed. In the descriptive words of Ken at Moyer, make "your eyes bulge out" with your lung pressure, and listen for air escaping, and feel if the pressure lessens. That's what I did recently, and it felt solid, so I moved on. If the manifold is good and the oil is not milky, water may be siphoning back from the exhaust. This can happen with some exhaust systems when you crank the starter for a long time without the engine firing, and with the raw water not turned off. Was it running ok before you removed the carb? Is there water on the plugs? If the water was only in the choke area, you may be able to clean and reassemble the carb.
I recently had a milky oil problem, but compression was good, and manifold and block each held lung pressure, the engine ran, no water in the cylinders or carb, and my exhaust water jacket doesn't allow water back into the engine, so it turned out to be the shot seals and worn shaft on the water pump.
Reply With Quote
  #10   IP: 216.227.90.131
Old 08-10-2019, 08:01 AM
edwardc's Avatar
edwardc edwardc is offline
Afourian MVP
 
Join Date: Aug 2009
Location: Laurel, MD
Posts: 2,509
Thanks: 153
Thanked 595 Times in 388 Posts
Another possibility we've seen reported before is water from a deck leak dripping directly into the flame arrester.
__________________
@(^.^)@ Ed
1977 Pearson P-323 "Dolce Vita"
with rebuilt Atomic-4

Reply With Quote
  #11   IP: 137.103.82.227
Old 08-10-2019, 12:09 PM
joe_db's Avatar
joe_db joe_db is offline
Afourian MVP
 
Join Date: May 2009
Posts: 4,474
Thanks: 49
Thanked 1,026 Times in 721 Posts
I had this issue with a poorly thought out exhaust system redesign. Until I fixed it, I had to keep the engine running at idle under sail to keep the water out. That actually was my diagnostic, went sailing on a rough day and kept the engine on = no water.
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
water in engine JOLLYBOAT Troubleshooting 6 07-09-2011 09:18 AM
water logged A4 breweraz Troubleshooting 18 09-13-2010 10:27 AM
Uh Oh...Water in Cylinders mike7a10 Exhaust System 10 05-19-2009 05:35 AM
acid flush of Fresh water cooled engine skhorleb Cooling System 1 01-16-2007 10:07 AM
Another ethanol question Bob N Fuel System 7 01-07-2007 06:22 PM


All times are GMT -4. The time now is 07:10 AM.


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