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: 64.250.96.154
Old 07-27-2019, 10:09 PM
pknier's Avatar
pknier pknier is offline
Senior Member
 
Join Date: Oct 2004
Location: Manitowoc, WI
Posts: 44
Thanks: 3
Thanked 1 Time in 1 Post
Looking for solutions. Engine runs for 6 hours stumbles to a stop but restarts to run

Removed, drained, and cleaned tank...new in-line filter, new rubber gas line, cleaned sediment bowl, disassembled and cleaned carburetor. New coil, plugs, points, and condenser last year. Started an 8 hour trip, engine stopped about half hour into trip, restarted with out problem, ran excellent for 6 hours, only to stop 6 hours into the trip, started up and ran 2 hours for the rest of the way. The next day ran excellent for almost 5 hours. Looking for what may cause these the uncertainty of these shutdowns that make our trip less enjoyable. Thanks for your input
Reply With Quote
  #2   IP: 216.212.203.12
Old 07-28-2019, 06:21 AM
chapster5 chapster5 is offline
Senior Member
 
Join Date: Aug 2014
Location: Ont
Posts: 45
Thanks: 116
Thanked 10 Times in 7 Posts
I am no expert but I will throw this out there, some kind of electrical intermittent issue. I would have thought maybe coil but you said it starts right back up and then runs for Hrs again.

Maybe describe better how it shuts down, does it cough and die? shut off just like using the key? Rpm's slowly lower and then die??

Smarter fella's will chime in soon I am sure.

Chapster5
Reply With Quote
  #3   IP: 174.219.143.236
Old 07-28-2019, 09:21 AM
roadnsky's Avatar
roadnsky roadnsky is offline
Afourian MVP
 
Join Date: Dec 2008
Location: Lake Mead, NV
Posts: 3,104
Thanks: 24
Thanked 467 Times in 309 Posts
Try this...

Connect a jumper wire (12-14 gauge) between the large battery terminal on the starter solenoid and the positive terminal (+) of the coil.
Connecting this jumper wire is the same as turning on the ignition switch and it will by-pass any problem that might exist in the "starting circuit", including the ignition switch itself.

IF the shutdowns stop you know you have an issue somewhere in the ignition wiring.

DON'T leave the jumper wire installed very long unless the engine is running or you'll pretty likely burn out the coil.
It's the same as having the ignition left ON

One other quick place to check is the ground wire where it passes under the distributor cap.
It is fairly common for it to get pinched or the insulating cover to get cut.
__________________
-Jerry

'Lone Ranger'

1978 RANGER 30
Reply With Quote
  #4   IP: 174.109.197.227
Old 07-28-2019, 09:58 AM
Marian Claire's Avatar
Marian Claire Marian Claire is offline
Afourian MVP
 
Join Date: Aug 2007
Posts: 1,797
Thanks: 33
Thanked 129 Times in 94 Posts
I had a small air leak in my fuel supply system that I believe allowed air to build in the main fuel filter. The filter was the high point of the system. Same symptoms as you describe. Almost drove me crazy with the irregularity of the shut downs. You may have a small leak from the new work done on the lines, fuel pump, filter etc. A fuel pressure gauge just before the carb may provide some good info if you can watch it during operation.
Here is the long winded post.
http://www.moyermarineforum.com/foru...1137#post81137
Dan
S/V Marian Claire
Reply With Quote
The Following 3 Users Say Thank You to Marian Claire For This Useful Post:
Administrator (07-28-2019), joe_db (07-29-2019), Sam (07-29-2019)
  #5   IP: 97.93.70.7
Old 07-28-2019, 09:02 PM
Dave Neptune Dave Neptune is online now
Afourian MVP, Professor Emeritus
 
Join Date: Jan 2007
Location: Grove, Oklahoma
Posts: 5,035
Thanks: 711
Thanked 1,289 Times in 839 Posts
We will need more of an idea as to how it died. Like the ign was shut off IE a sudden shutdown or did it stumble to a stop?

When it restarted did it act just fine like "normal" or was it a bit rough or sluggish?

Since it started right back up it is unlikely a fuel issue as you have a mechanical pump, correct?

Fire it up and check voltages at the connecting points on the key switch all the way to the coil. Look for loose connections and/or corrosion. Give the wires a wiggle and if you have the "trailer plug" style connector wiggle and clean if necessary. While wiggling and checking if the engine dies your probably wiggling a faulty connection.

Dave Neptune
Reply With Quote
  #6   IP: 24.152.132.140
Old 07-28-2019, 09:12 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
Fuel pressure and coil input voltage data during shutdown would be valuable information.
__________________
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: 174.198.6.61
Old 07-29-2019, 11:27 AM
pknier's Avatar
pknier pknier is offline
Senior Member
 
Join Date: Oct 2004
Location: Manitowoc, WI
Posts: 44
Thanks: 3
Thanked 1 Time in 1 Post
I have mechanical fuel pump rebuilt three years ago. I stops like turning the key off. I do not have fuel pressure gauge, but will have to add one. Is there a link for installing coil voltage meter?
Reply With Quote
  #8   IP: 174.198.6.61
Old 07-29-2019, 11:30 AM
pknier's Avatar
pknier pknier is offline
Senior Member
 
Join Date: Oct 2004
Location: Manitowoc, WI
Posts: 44
Thanks: 3
Thanked 1 Time in 1 Post
Ran fine after start up. Will do some wiggling and cleaning. Thank everyone for their suggestion
Reply With Quote
  #9   IP: 24.152.132.140
Old 07-29-2019, 11:42 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 pknier View Post
I have mechanical fuel pump rebuilt three years ago. It stops like turning the key off.
This pretty strongly suggests an electrical connection or switch problem. I'd lean more toward the switch because manipulating it to restart seems to clear the problem.

Quote:
Originally Posted by pknier View Post
I do not have fuel pressure gauge, but will have to add one. Is there a link for installing coil voltage meter?
I don't recall a coil input voltage meter discussion but it should be simple to install between the coil '+' post and a ground. To be useful in this case the gauge should be visible from the helm so it can be observed at the exact point of shutdown. FYI, two of the five parameters monitored by the EWDS are fuel pressure and coil input voltage.
__________________
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
  #10   IP: 97.93.70.7
Old 07-29-2019, 11:54 AM
Dave Neptune Dave Neptune is online now
Afourian MVP, Professor Emeritus
 
Join Date: Jan 2007
Location: Grove, Oklahoma
Posts: 5,035
Thanks: 711
Thanked 1,289 Times in 839 Posts
I did not mean a "coil voltage meter", I meant check the voltage at the coil and everywhere else on the circuit "with a meter".

Dave Neptune

Last edited by Dave Neptune; 07-29-2019 at 11:55 AM. Reason: oops
Reply With Quote
  #11   IP: 137.103.82.227
Old 07-29-2019, 12:32 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
This is designed to find issues:
https://moyermarine.com/product/the-...m-ktas_01_564/

It is not as easy as you might think to tell spark and fuel issue apart. Under cruise power, the engine quits stone dead pretty fast with no fuel, almost as fast as an electrical issue.
IMHO I would get a fuel pressure gauge ASAP and preferably one that can be seem underway if you don't get the warning light. I tracked down a vapor-lock issue that would have taken 100 years to find otherwise. A vacuum gauge on the fuel filter is a huge help too.
Reply With Quote
The Following User Says Thank You to joe_db For This Useful Post:
Administrator (07-29-2019)
  #12   IP: 24.152.132.140
Old 07-29-2019, 07:11 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 pknier View Post
It stops like turning the key off.
Hey wait, that contradicts the thread title ("stumbles to a stop"). Please confirm which is accurate.
__________________
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
The Following User Says Thank You to ndutton For This Useful Post:
Marian Claire (07-29-2019)
  #13   IP: 137.200.32.6
Old 07-30-2019, 08:15 AM
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
If you are moving at full speed and shut the engine down, sometimes water pressure on the prop will make it turn over a few times. This can be confused with "stumbling".
Reply With Quote
  #14   IP: 174.197.13.138
Old 07-30-2019, 10:11 AM
pknier's Avatar
pknier pknier is offline
Senior Member
 
Join Date: Oct 2004
Location: Manitowoc, WI
Posts: 44
Thanks: 3
Thanked 1 Time in 1 Post
It is more like turning the key off than sputtering(run...stop...try to run...stop) to a stop
Reply With Quote
  #15   IP: 71.38.107.125
Old 08-01-2019, 10:10 AM
roadnsky's Avatar
roadnsky roadnsky is offline
Afourian MVP
 
Join Date: Dec 2008
Location: Lake Mead, NV
Posts: 3,104
Thanks: 24
Thanked 467 Times in 309 Posts
Have you tried the procedure I suggested in Post #3 yet?
__________________
-Jerry

'Lone Ranger'

1978 RANGER 30
Reply With Quote
  #16   IP: 73.239.55.5
Old 08-07-2019, 11:12 AM
JackConnick JackConnick is offline
Senior Member
 
Join Date: Nov 2004
Posts: 168
Thanks: 6
Thanked 9 Times in 5 Posts
Coil over heating?

I had a lot of problems with the coil overheating after running it for a while. The standard install on the back of the engine is pretty poor and many engines have auto coils that just aren't up to the job. It would start and run fine after it cooled off.

Finally got one of the higher power Moyer coils and mounted it off the engine on a bulkhead, ran some thicker gauge wire from the ignition switch as well.

Jack
Reply With Quote
Reply

Tags
Engine shutdowns

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
Engine runs rough at higher RPM's under load capnward Troubleshooting 7 09-30-2014 05:01 PM
Engine Sputters and Coughs, and Needed Choke to Run Smooth CaptainChas Troubleshooting 9 06-30-2009 10:50 PM
Removing the engine from your boat Don Moyer General Interest 13 06-27-2008 11:06 AM
Engine runs then dies Now it won't start Mal Leichter Troubleshooting 11 08-19-2006 02:30 PM
Removing the engine from your boat Don Moyer Ranger 7 12-12-2005 12:24 PM


All times are GMT -4. The time now is 01:05 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