For a friend - Rochester Carb Replacement- what is this adjustment?

Discussion in 'Gas Engines/Drives/Transmissions/Props' started by 370Dancer, Jan 20, 2022.

  1. 370Dancer

    370Dancer Well-Known Member

    Oct 2, 2006
    Florida - Alabama
    1998 370 Sundancer
    380hp MAG MPI Gen VI with V drives
    Not sure what the screw deal is on the pull down linkage.
    Rochester on a Volvo engine old carb didn't have it

    choke 1.jpeg
     
  2. techmitch

    techmitch Well-Known Member PLATINUM Sponsor

    May 1, 2008
    Chesapeake Bay, Middle River/Frog Mortar Creek MD.
    1999 270 DA
    Twin 4.3s W/Alpa I Gen II's
    Adjustable pull downs are a nice feature/upgrade. They cover wide range of applications where the area denotes different needs. Think; average temps, altitude and moisture or lack there of.
    Wish I could be down there with @scoflaw to help you through your latest endeavors.
     
  3. Nater Potater

    Nater Potater Well-Known Member GOLD Sponsor

    Oct 19, 2020
    Southwest Idaho
    1992 300DA Sundancer
    Twin Merc Alpha Gen II I/O's with 5.7 V8's
    Based on engine and usage, you should have a note in the destructions telling how to set it, and to what value. Typically, with the choke closed, the primaries are opened all the way, which causes the choke butterfly to be forced open a prescribed amount. If the carb was purchased for your specific application, it "should" already be set. Either way, it's just there to make sure you can manually force a sticky choke to open by shoving the throttle to the stops.
     
  4. 370Dancer

    370Dancer Well-Known Member

    Oct 2, 2006
    Florida - Alabama
    1998 370 Sundancer
    380hp MAG MPI Gen VI with V drives
    thanks guys. I'll pass it along.
     

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