MERC 4 HP: LEAN OR RICH MIXTURE!

[CARLOS]

HI SIRS,<br /><br />I WOULD LIKE TO KNOW ,ABOUT THE MIXTURE SCREW FUNCTION, LOCATED IN CARBURATOR.<br />MANUAL SAYS THAT: IF YOU TURN CLOCKWISE (CLOSE THE SCREW), THE MIXTURE IS "LEAN"...THAT´S RIGHT?<br />MY UNDERSTANDING IS THAT SCREW IS "AIR" CONTROL ONLY...THAT´S RIGHT? <br />IF IT IS CLOSE, THE MIXTURE MUST TO BE RICH, BECAUSE POOR AIR INTAKE...<br />SOMEBODY CAN ADVISE ME ABOUT THIS PROCEDURE FOR MIXTURE BEST POSITION?<br />ADDITIONAL, IN CASE OF 3.4L 275hp MERC ENGINE, CAN I ADJUST,IDLE MIXTURE? BY REPLACING JET# ?<br />THANKS.<br />REGARDS

 

[Kenny Bush]

Re: MERC 4 HP: LEAN OR RICH MIXTURE!

Hey Carlos..... I would have to agree with you in regards to turning the screw clockwise(to close off) and turn counter-clockwise to open up(air in).... In regards to your BIG motor, Yes you will have to Rejet(if it has the WH-1) carb. In both cases refer to the manual for factory presets. I have made a bid on Two Pro 300 Merc outboards, to put on a 27' Fountain Center Console........ It will be fun.......with my hair on fire.........

 

[CARLOS]

Re: MERC 4 HP: LEAN OR RICH MIXTURE!

THANKS BUSH, YOU´RE ALWAYS IN AIR....ON FIRE..<br /><br />CS