SailNet Community - Reply to Topic
Thread: Atomic 4 Slow forward Reply to Thread
Send Trackbacks to (Separate multiple URLs with spaces) :
Post Icons
You may choose an icon for your message from the following list:

Register Now

In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

  Additional Options
Miscellaneous Options

Click here to view the posting rules you are bound to when clicking the
'Submit Reply' button below

  Topic Review (Newest First)
07-11-2001 08:26 AM
Atomic 4 Slow forward

If it works good in reverse, it''s possible that you could have something around the prop, also check your transmission, may be slipping in fwd.
07-10-2001 05:24 AM
Atomic 4 Slow forward

The atomic 4 on the Morgan 28 I purchased had a similar problem on the survey sea trial. My surveyor said it was pretty common and usually caused by the flyweight mechanism in the bottom of the distributor seizing up. I''m not sure if that was actually the cause since the shipyard/broker took care of the problem before delivery.
06-15-2001 12:44 PM
Atomic 4 Slow forward

You may have something wrapped on the prop shaft. Put on the mask and snorkel and have a look.

06-14-2001 08:58 PM
Atomic 4 Slow forward

Agree with the fouled prop.
However, if this doesnt clear the problem..... Check the following:
1. dirt in the emulsion tube in the carburator.
2. The very beginnings of a blown head gasket. If you have closed loop freshwater system you can get some specialized dye from an automotive speed shop to check for excess CO/CO2 in the cooling water. Obviously, if your raw water cooled this wont work.
06-14-2001 12:19 PM
Atomic 4 Slow forward

Make certain that the prop is clean. It only takes a small amount of fouling to really de-power the A4. I had a similar experience last summer and did a quick haul to clean the prop. I was amazed how little fouling was on the prop. After cleaning and relaunch, it felt as though the motor was new.
06-14-2001 10:44 AM
Jeff Gallo
Atomic 4 Slow forward

I own a 1979 C&C 29 with the original atomic 4 engine. The engine has always run great up till now.
Neutral & reverse has all the power in the world however when in forward the top 2/3 of the throttle is flat. The RPM just stay flat and the engine feels strained. Saltwater Exhaust is flowing great, new plugs, points, condenser. I have noticed that the clear inline fuel filter before the elctric fuel pump is never completely filled more than half way. This RPM is just not cutting it in a 5 knot current. HELP!!!Thanks.

Posting Rules  
You may post new threads
You may 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 On

For the best viewing experience please update your browser to Google Chrome