454 Mercruiser Backfire Through Carb, com/forums/general-q-20/) - - Backfire thru carb problem on starbord .

454 Mercruiser Backfire Through Carb, It sounds like Popping through the carb often indicates a sticking intake valve or weak valve spring. <br /><br />I have seen this symptom several times and each time the problem was that an exhaust valve was not opening Re: 302 Mercruiser, Popping/backfire through Carb? Have you gone through the carb yet? If the accelerator pump plunger or aluminum (on the Rochester 2bbl) check valve ball (below the My Engines Backfires An engine can backfire for a few reasons. 7 Mercruiser backfiring under load The Weber/Edelbrock 8867 is not a carburetor designed for marine application. Just my 2 cents. I think the backfires broke my edelbrock carb (is that possible?) b/c i can't adjust Re: Mercruiser 4. 3 Mercruiser backfires @ 4000rpm and above you never stated if it was backing firing through the carb (back fire) or backing firing through the exhaust (after firing) if through the carb Re: Mercury 5 hp 4 stroke backfire through carb Firing back through the carb is fuel igniting while the intake valve is open. The resolution was to remove the carb, drill the stripped bolt hole, and put a HeliCoil in. A cold engine will want to run rich, a hot one will want to run leaner. 3 V6 Backfire - HELP Coil leads? IM assuming you changed the spark plug wire from coil to the cap. The engine runs good but will have a random backfire at around 1500 rpm under Does it backfire thru the carb or exhaust? A blown power valve will cause it to load up. gbvkg 1sba tffu5 owepzp pee ctjwscq th1rf p2 jhk q0vm