Return to the home page...

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

Thread Tools Display Modes
  #1   IP:
Old 11-06-2018, 04:22 AM
sailr sailr is offline
Senior Member
Join Date: Apr 2018
Posts: 14
Thanks: 0
Thanked 6 Times in 3 Posts
Acceleration problems

I have a problem similar to one that is an old post. My engine ran fine after I fixed over heating problem for about six months. I go to the boat and crank the engine about once every two weeks. It always cranks and runs fine. I put the choke on and crank the engine. It usually takes a couple of short tries and then it cranks and runs fine. I take the choke off after the engine warms up and it runs really smooth. I put it in forward and she runs smoothly as I increase the rpms. I idle back down and then put her in reverse and increase rpms and after a few minutes I idle back down. I do these for about 15 to 20 minutes and the shut the engine down.
Now the problem-
Last time I went out to crank her she cranked up fine and ran smoothly. When I increased the rpms the engine seemed to stall and almost died but then caught back up and ran at the increased rpms. I thought I had not warmed the engine up enough so I idler her back down and when the engine got up to 140 degrees I tried to increase the rpms again with the same reaction. Motor almost stalled and then caught up and ran fine. I tried putting her in gear and when I increased the rpms same reaction. Motor almost stalled, but then caught back up. Once the motor catches back up it runs fine no matter what the rpms are.

I will replace spark plugs first to see if they are the culprit. Does anyone have any ideas of where to go from there if that doesn't help? The old article was about blocked exhaust hose and delaminated exhaust hose that was causing back pressure on the exhaust. I have a fantastic water flow out the exhaust with no smoke or steam and the engine temp never gets above 160F.

I have only owned the boat for a year and haven't done any sailing due to work on the boat from water leaks from stanchions. I got the boat on eBay for what I thought was a song. After I got her here to Lake Charles I had several medical problems including a mini stroke and two surgeries. Spent 3 or 4 months of the year in the hospital. Now all better so have begun to work on her again. Any advice or experiences of this problem and successful remedy would be greatly appreciated

Reply With Quote
  #2   IP:
Old 11-06-2018, 07:09 AM
ndutton's Avatar
ndutton ndutton is offline
Afourian MVP
Join Date: May 2009
Location: Torrance, CA
Posts: 8,424
Thanks: 132
Thanked 1,158 Times in 774 Posts
Centrifugal advance might be a problem.
1977 Catalina 30
San Pedro, California
prior boats 1987 Westsail 32, 1970 Catalina 22
Had my hands in a few others
Reply With Quote
  #3   IP:
Old 11-06-2018, 09:29 AM
joe_db's Avatar
joe_db joe_db is online now
Join Date: May 2009
Posts: 3,293
Thanks: 46
Thanked 355 Times in 266 Posts
That could be it. One of my outboards had the advance linkage fall off and it would only idle and died when you accelerated.
Reply With Quote
  #4   IP:
Old 11-06-2018, 02:19 PM
Antibes's Avatar
Antibes Antibes is offline
Senior Member
Join Date: Jun 2011
Location: Chicago, IL
Posts: 90
Thanks: 2
Thanked 13 Times in 10 Posts
+1 on Neil's suggestion. Clean and oil the weights and springs in distributor advance mechanism. I had your same symptoms for a year and was fixed immediately with a little work
Reply With Quote
  #5   IP:
Old 11-06-2018, 02:29 PM
sailr sailr is offline
Senior Member
Join Date: Apr 2018
Posts: 14
Thanks: 0
Thanked 6 Times in 3 Posts
Thanks for the info and advice. Now if the storms would just stop! I'll look into the distributor advance an see what I can do.

thanks again
Reply With Quote

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
Transmission Problems are continuing. brian6622 Troubleshooting 5 05-31-2016 10:56 AM
New Atomic owner with problems filbert99 Troubleshooting 5 07-21-2015 02:14 AM
Neighbor with problems Dave Neptune Troubleshooting 15 01-20-2010 12:25 AM
Fuel tank flush? Fuel deliver problems. SimonP Fuel System 13 10-02-2008 05:22 PM
Overheating problems jdaly986 Cooling System 1 01-16-2008 10:32 AM

All times are GMT -4. The time now is 04:21 PM.

Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2019, vBulletin Solutions, Inc.

Universal® is a registered trademark of Westerbeke Corporation

Copyright © 2004-2019 Moyer Marine Inc.

All Rights Reserved