User Tag List
Thanks: 0
Results 1 to 15 of 19
Thread: 3.0 running rough at idle
-
01-06-2019, 04:28 PM #17000 RPM
- Join Date
- Mar 2009
- Location
- Port Saint Lucie
- Posts
- 2,523
- Thanks (Given)
- 3
- Thanks (Received)
- 31
- Likes (Given)
- 6
- Likes (Received)
- 250
- Mentioned
- 0 Post(s)
- Tagged
- 1 Thread(s)
3.0 running rough at idle
So I have a 3.0 Looper that is supposed to have pistons and reeds in it but its only what ive been told. Its been tuned by Monty (so I was told). It runs great when running higher than idle rpm. When first started I expect a little putter until it warms up, but itll usually cut off a couple times before its warmed up. And idling it "coughs, sneezes or putters" not sure how to describe it. The carbs have been gone through and are clean. Not sure if its anything with the carbs or anything else, other than that it runs good. I will get a fresh set of plugs and see it that helps. Anything else I could look at. Not a Huge problem, but Kinda annoying.
-
01-06-2019, 10:36 PM #25000 RPM
- Join Date
- Sep 2014
- Location
- chicago,il
- Posts
- 227
- Thanks (Given)
- 1
- Thanks (Received)
- 3
- Likes (Given)
- 0
- Likes (Received)
- 9
- Mentioned
- 0 Post(s)
- Tagged
- 0 Thread(s)
how does it idle when warm..reason being if it has "quick start" these motor will belch cough spit while in fast start mode until it kicks off...
-
01-07-2019, 05:44 AM #3Screaming And Flying!
- Join Date
- Jun 2007
- Location
- Singapore/Melbourne/Italy
- Posts
- 9,109
- Thanks (Given)
- 1010
- Thanks (Received)
- 356
- Likes (Given)
- 4327
- Likes (Received)
- 1976
- Mentioned
- 8 Post(s)
- Tagged
- 0 Thread(s)
what year
what version carbs
-
01-10-2019, 10:28 AM #47000 RPM
- Join Date
- Mar 2009
- Location
- Port Saint Lucie
- Posts
- 2,523
- Thanks (Given)
- 3
- Thanks (Received)
- 31
- Likes (Given)
- 6
- Likes (Received)
- 250
- Mentioned
- 0 Post(s)
- Tagged
- 1 Thread(s)
Not sure what year carbs. Its a mismatched motor. The carbs have the 4 screw side plates and does not have the brass pullover tubes in them. There is another motor at my shop that is a 99 225 ocean pro, it has 5 screw side plates, idle screw adjustment not jet and it has the pullover tubes. I have a spare set that was given to me that is from a v8, they have 2 screw side plate and the pullover tubes. There are only 5 tubes, im gonna try to find another tube and put the set on my current carbs. Ill try to poste pics later. I read that I should/could put a fender washer on the center screw of the side plates, I read that itll help pull the plate down evenly, apparently if they leak itll cause a bad idle. Im gonna eventually rebuild all of them. Also the motor I have has a 2 small fuel pump setup, not the big single pump that I expected. Any info will be appreciated.
-
01-10-2019, 10:43 AM #55000 RPM
- Join Date
- Sep 2014
- Location
- chicago,il
- Posts
- 227
- Thanks (Given)
- 1
- Thanks (Received)
- 3
- Likes (Given)
- 0
- Likes (Received)
- 9
- Mentioned
- 0 Post(s)
- Tagged
- 0 Thread(s)
If u got 2 small pu.pumps sounds like previOS owner deleted the vro. Make sure your running oil in gas and not burning up motor, thus the poor running
-
01-10-2019, 01:10 PM #67000 RPM
- Join Date
- Mar 2009
- Location
- Port Saint Lucie
- Posts
- 2,523
- Thanks (Given)
- 3
- Thanks (Received)
- 31
- Likes (Given)
- 6
- Likes (Received)
- 250
- Mentioned
- 0 Post(s)
- Tagged
- 1 Thread(s)
Correct no vro, I premix.
-
01-10-2019, 04:25 PM #77000 RPM
- Join Date
- Mar 2009
- Location
- Port Saint Lucie
- Posts
- 2,523
- Thanks (Given)
- 3
- Thanks (Received)
- 31
- Likes (Given)
- 6
- Likes (Received)
- 250
- Mentioned
- 0 Post(s)
- Tagged
- 1 Thread(s)
-
01-10-2019, 04:32 PM #87000 RPM
- Join Date
- Mar 2009
- Location
- Port Saint Lucie
- Posts
- 2,523
- Thanks (Given)
- 3
- Thanks (Received)
- 31
- Likes (Given)
- 6
- Likes (Received)
- 250
- Mentioned
- 0 Post(s)
- Tagged
- 1 Thread(s)
-
01-10-2019, 04:37 PM #97000 RPM
- Join Date
- Mar 2009
- Location
- Port Saint Lucie
- Posts
- 2,523
- Thanks (Given)
- 3
- Thanks (Received)
- 31
- Likes (Given)
- 6
- Likes (Received)
- 250
- Mentioned
- 0 Post(s)
- Tagged
- 1 Thread(s)
-
01-11-2019, 11:15 AM #105000 RPM
- Join Date
- Jan 2008
- Location
- SUMMERVILLE S.C.
- Posts
- 201
- Thanks (Given)
- 1
- Thanks (Received)
- 34
- Likes (Given)
- 8
- Likes (Received)
- 42
- Mentioned
- 0 Post(s)
- Tagged
- 0 Thread(s)
all the throttle plates need to be completely closed at idle...loosen the shafts and get them all closed...if you are running without an air box you will have to rejet idle bleeds...
-
01-12-2019, 10:54 PM #115000 RPM
- Join Date
- Oct 2017
- Location
- Hugo, MN
- Posts
- 326
- Thanks (Given)
- 36
- Thanks (Received)
- 18
- Likes (Given)
- 62
- Likes (Received)
- 81
- Mentioned
- 0 Post(s)
- Tagged
- 0 Thread(s)
My Looper started sneezing at idle last year. Going to replace the reeds soon, should take care of my problem. When yours sneezes does any air/fuel blow back out the front of the carb?
-
01-13-2019, 10:05 PM #12Scream And Fly VIP
- Join Date
- May 2001
- Location
- Hickory NC
- Posts
- 5,583
- Thanks (Given)
- 18
- Thanks (Received)
- 250
- Likes (Given)
- 204
- Likes (Received)
- 464
- Mentioned
- 4 Post(s)
- Tagged
- 1 Thread(s)
Most carbs did not come with pull overs they were an add on.
-
01-13-2019, 10:57 PM #135000 RPM
- Join Date
- Jan 2008
- Location
- SUMMERVILLE S.C.
- Posts
- 201
- Thanks (Given)
- 1
- Thanks (Received)
- 34
- Likes (Given)
- 8
- Likes (Received)
- 42
- Mentioned
- 0 Post(s)
- Tagged
- 0 Thread(s)
-
01-13-2019, 11:36 PM #145000 RPM
- Join Date
- Sep 2014
- Location
- chicago,il
- Posts
- 227
- Thanks (Given)
- 1
- Thanks (Received)
- 3
- Likes (Given)
- 0
- Likes (Received)
- 9
- Mentioned
- 0 Post(s)
- Tagged
- 0 Thread(s)
They used to call it a " lean spit"
-
01-14-2019, 06:39 AM #155000 RPM
- Join Date
- Oct 2017
- Location
- Hugo, MN
- Posts
- 326
- Thanks (Given)
- 36
- Thanks (Received)
- 18
- Likes (Given)
- 62
- Likes (Received)
- 81
- Mentioned
- 0 Post(s)
- Tagged
- 0 Thread(s)
Thanks for additional info. I had started this thread previously:
https://www.screamandfly.com/showthr...er-idle-sneeze
Will be rebuilding the carbs and inspecting/replacing the reeds in the next few months (I'm in MN, no boating this winter, and apparently no snowmobiling this year either (unfortunately)).
Any other ideas appreciated.
Similar Threads
-
Mercury Tech: 2.5 rough idle
By redsnapper386 in forum Technical DiscussionReplies: 5Last Post: 02-22-2018, 10:26 AM -
Mercury Tech: -85 200 2.4 rough idle, stumble, extreme fuel consumption, cold idle
By Roos in forum Technical DiscussionReplies: 11Last Post: 08-11-2014, 06:21 AM -
1973 evinrude 85 is running rough at idle speed in gear.
By Palmtreeguy in forum Technical DiscussionReplies: 6Last Post: 06-06-2012, 12:40 AM -
2.5 260 rough idle
By YELLOWSS in forum Technical DiscussionReplies: 0Last Post: 08-04-2005, 08:05 PM