User Tag List
Thanks: 0
Likes: 0
Results 1 to 4 of 4
-
07-13-2020, 07:20 PM #15000 RPM
- Join Date
- Apr 2015
- Location
- Oceanside, NY
- Posts
- 155
- Thanks (Given)
- 20
- Thanks (Received)
- 10
- Likes (Given)
- 51
- Likes (Received)
- 119
- Mentioned
- 0 Post(s)
- Tagged
- 0 Thread(s)
96 merc 225 efi running rough when weather warms up
1996 mercury 225 efi seems to run rough when the weather warms up.
I had the same problem last year, it ran great in the fall and spring but throughout the summer in the 80 degree heat it would run rough intermittently at all speeds. I have had a hard time diagnosing this because it usually occurs after an hour or so of running so for small trips I dont usually notice it. Usually when it runs rough I hear continuous intermittent beeps (not the low oil sensor 4 beeps thing) from the warning horn. I'll have to give it additional throttle to stay at cruise, then all of a sudden it will be running like a raped ape. It almost feels like it is dropping a cyl or 2 or misfiring. At idle when it runs rough it will spit out a big cloud and get the misfire shakes.
I always do my yearly maintenance, filters, plugs etc. I swapped an entire fuel injection system and vst off of another motor and still have the same problem.
Any help would be appreciated.
-
07-13-2020, 07:24 PM #25000 RPM
- Join Date
- Apr 2015
- Location
- Oceanside, NY
- Posts
- 155
- Thanks (Given)
- 20
- Thanks (Received)
- 10
- Likes (Given)
- 51
- Likes (Received)
- 119
- Mentioned
- 0 Post(s)
- Tagged
- 0 Thread(s)
I would like to add it is the stbd motor on a set of twins. The other motor runs fine, so fuel is not a problem.
-
07-14-2020, 07:10 AM #35000 RPM
- Join Date
- Apr 2015
- Location
- Oceanside, NY
- Posts
- 155
- Thanks (Given)
- 20
- Thanks (Received)
- 10
- Likes (Given)
- 51
- Likes (Received)
- 119
- Mentioned
- 0 Post(s)
- Tagged
- 0 Thread(s)
Anyone?
-
07-15-2020, 08:18 PM #45000 RPM
- Join Date
- Apr 2015
- Location
- Oceanside, NY
- Posts
- 155
- Thanks (Given)
- 20
- Thanks (Received)
- 10
- Likes (Given)
- 51
- Likes (Received)
- 119
- Mentioned
- 0 Post(s)
- Tagged
- 0 Thread(s)
I changed the main harness(had a spare) and the stator. Seems to have worked.
Similar Threads
-
OMC Tech: 3.0 running rough at idle
By Gorilla0178 in forum Technical DiscussionReplies: 18Last Post: 01-14-2019, 06:29 PM -
2L merc running rough, bleed line & oil gear block off leaking?
By gmjim in forum Technical DiscussionReplies: 8Last Post: 09-24-2010, 02:48 AM -
OMC Tech: 225 Johnson running rough
By captglm in forum Technical DiscussionReplies: 15Last Post: 06-03-2009, 07:40 PM -
running good in cold weather
By fastcat in forum General Boating DiscussionReplies: 19Last Post: 05-07-2007, 09:33 PM -
Nice weather in NC (running videos)
By YELLOWXD in forum The Scream And Fly LoungeReplies: 0Last Post: 12-28-2006, 09:05 PM