Morning, I'm french so excuse my bad english !<br />My problem is that my 6 sparks on my 225hp v6 from 1991 are fouled when I run on iddle position. The carburator type are with 3 orifices two air orifices one iddle and one intermediate and one fuel orifice for high speed. My engine doesn t work good until 2600 rpm ( I thing that all the cylinder are two rich) and after 3000 rpm it run well. The iddle timing is good 6° after high position of cylinder one, Spark champion new, wires news and I check with a stromboscopique lamp that all the cylinder have ignition. The floater is right on the carburators .News gasket fuel ok. I try without the VRO pump with a can of 2 % oil fuel, but same problem. Recirculation OK vacum switch new, Starter solenoid rebuild and ok.<br />The only thins that it is like the book says is the size of intermediate orifices. OMC says 55 is the right size but my engine is fitted with 47. <br />But if I put 55 Could you confirm that the mixture will be more rich ? <br />And also if somebody could told me untill witch rpm the intermediate orifice works ?<br />One more thinks on iddle position I use 2.5 gallons per hour. <br />Thanks for your help 
.... to a lose french guy
.... to a lose french guy