what your experiencing is dieseling....very bad on a water borne engine since it can suck water into the piston thru the exhaust....usually happens when your running hard and haven't had a chance to cool the engine down at idle speed..
so...here's what you do...insure that the points gap/dwell are within specs if you have them....make sure the plug gaps are correct....then start the engine either in the water or on muffs...check the timing....if your not set right..the engine will either diesel or back fire thru the carb
.adjust the carb on the idle circuits....ie...turn each one all the way in till they just seat...then back them out 1.5 turns...don't know what engine you have so I'm assuming it's a SBC ...blip the throttle a few times to get it to settle down...adjust the idle mixture till the engine runs smooth..don't keep turning them out...once it goes from running a little hard to smooth..that's it....then adjust the idle speed to about 600rpms....that's it...unless you have bad gas..then run it out and add new gas......hope this helps....
__________________
__________________
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!
|