Running Rich-gctid375343

[MDR3055]

Hi all!!!

So as my return to the summer "maintenance" continues, I have come upon an iffy situation. I changed all the plugs out on both engines(Merc 5.0 2bbl mercarb) and noticed that the plugs a little black for my taste. Not the correct cyan type of color you should want to see. Obviously a little running a bit rich.

now, let me give some background. Beginning of last season both engines were running a bit rough, not idling so well and it was just time to rebuild carbs. Folks, rebuilding carbs is an art LOL After rebuilding both of them myself and only getting minor improvements i had one rebuilt and picked up a remanned one. Well, both engines responded ecellent and run smooth and idle purrrrrfect Now that I changed plugs I am realizing it is a bit on the rich side.

I hate to monkey around with the carbs, because if it runs smooth, I certainly do not want to nacker that up. Any recomendations if I should play with the mixtures??? And how does one accomplish this task. Is it the forward facing adjustment screw on the carb(the spring loaded one)??

Thanks everyone

[Guest]

MDR3055 wrote:


I hate to monkey around with the carbs, because if it runs smooth, I certainly do not want to nacker that up. Any recomendations if I should play with the mixtures??? And how does one accomplish this task. Is it the forward facing adjustment screw on the carb(the spring loaded one)??

Thanks everyone

If it ain't broke, don't fix it! The carbed engines generally run a bit on the rich side when idling. If you spend a lot of time in no wake zones or are just trolling around, having some carbon on the spark plugs is normal. Once a season I add https://"http://www.seafoamsales.com...<br /> SeaFoam to the fuel tank to clean the carbon build up, it works great and cleans your entire carb and combustion chamber from gunk and carbon buildup.

[MDR3055]

GrindKore wrote:
If it ain't broke, don't fix it! The carbed engines generally run a bit on the rich side when idling. If you spend a lot of time in no wake zones or are just trolling around, having some carbon on the spark plugs is normal. Once a season I add https://"http://www.seafoamsales.com...<br /> SeaFoam to the fuel tank to clean the carbon build up, it works great and cleans your entire carb and combustion chamber from gunk and carbon buildup.

Thanks, GrindKore!! Question on the seafoam....Can it be added in the fuel with other additives? Currently I also use ValveTech ethanol buster/stabilizer.