Reply
 
Thread Tools Search this Thread Display Modes
 
Old 05-12-2009, 05:46 PM   #1
Ensign
 
Join Date: May 2009
Posts: 10
Default backfire 1800 sr 4.3 v6

recently bought 1800sr 2002 has v6 4.3 double carbs ,
when engine runs it backfires intermittently but runs smoothly if you gradually open the throttle with the linkage disconected. any ideas boat buddys tell me that the timing is out.
__________________

chucknorristoo is offline   Reply With Quote
Old 05-12-2009, 07:19 PM   #2
Lt. Commander
 
Join Date: Feb 2008
Location: Notts UK
Posts: 186
Default Re: backfire 1800 sr 4.3 v6

Could be timing, mine back fired well with the timing out

Could also be bad fuel, Bad plugs dirty carb etc has the boat been laid up for a while?
__________________

__________________
Gaz
Gazjen is offline   Reply With Quote
Old 05-12-2009, 07:27 PM   #3
Admiral

 
seapuppy's Avatar
 
Join Date: Nov 2005
Location: Everett Wa
Posts: 4,681
Default Re: backfire 1800 sr 4.3 v6

welcome to the zoo...from what your describiing...sounds like the carbs are out of synch.....get one of those carb sync kits or one of the venturi type used on webber carbs ....then learn where to adjust the carbs....once sync'd up...then you can address the timing/plugs/plug wires/distributor cap and rotor...and points if you have them....but I'd start with the carb's themselves....also make sure that the mounting bolts are tight...no vacuum leak at the base.....do this before you try working on the carbs....use soapy water and a squirt bottle...shoot it around the base..if the engine smooths out...you have a leak...if not....move on....


SP irate:
__________________
Don't compare your life to others. You have no idea what their journey is all about.
------------------------
SSN683 Association member
Par Excellence
------------------------------
2008 Bayliner 340 - "Wild Whim"
--------------------------------------
I live in my own little world....but it's okay-they know me here!!!

Avid practitioner of the martial art: KLIK-PAO.
Tap-Rack-Bang

Anyone that sez "Size doesn't matter" has never owned a boat!
seapuppy is offline   Reply With Quote
Old 05-13-2009, 08:27 AM   #4
Ensign
 
Join Date: May 2009
Posts: 10
Default Re: backfire 1800 sr 4.3 v6

Quote:
Originally Posted by Gazjen
Could be timing, mine back fired well with the timing out

Could also be bad fuel, Bad plugs dirty carb etc has the boat been laid up for a while?
thanks for that will start with timing then work my way through carb
chucknorristoo is offline   Reply With Quote
Old 05-13-2009, 08:29 AM   #5
Ensign
 
Join Date: May 2009
Posts: 10
Default Re: backfire 1800 sr 4.3 v6

Quote:
Originally Posted by seapuppy
welcome to the zoo...from what your describiing...sounds like the carbs are out of synch.....get one of those carb sync kits or one of the venturi type used on webber carbs ....then learn where to adjust the carbs....once sync'd up...then you can address the timing/plugs/plug wires/distributor cap and rotor...and points if you have them....but I'd start with the carb's themselves....also make sure that the mounting bolts are tight...no vacuum leak at the base.....do this before you try working on the carbs....use soapy water and a squirt bottle...shoot it around the base..if the engine smooths out...you have a leak...if not....move on....


SP irate:
thanks for that, will set timing then work through carb.
chucknorristoo is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
all my mod's worked!! seapuppy Maxum Owners General Discussions 4 03-19-2007 01:07 PM

Powered by vBadvanced CMPS v3.2.3

All times are GMT. The time now is 07:40 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2020, vBulletin Solutions, Inc.