A carburetor rebuild is one of the best ways to restore clean idle quality, crisp throttle response, easier starting, and dependable fuel control on an older Mercury or Mariner V6 two-stroke outboard.
This WMV Carburetor Rebuild Kit is designed for Mercury / Mariner WMV-series carburetors and is commonly cross-referenced as Mercury / Quicksilver 8107493, Sierra 18-7214, and GLM 40630.
This kit fits ALL WMV carburetor applications, including WMV 1, 1A, 2, 2A, 3, 3A, 4, 4A, 5, 5A, 16, 30, 31, 32, 33, 34, and 39. Because many older Mercury and Mariner engines have had carburetors swapped over the years, the safest way to confirm fitment is to match the actual WMV number on the carburetor and the rebuild-kit part number, not just the horsepower decal on the cowling.
Important Fitment Note
This is a WMV carburetor rebuild kit. It does not fit WMH carburetors. If your carburetor is stamped or identified as WMH, this is not the correct kit. Mercury used several similar-looking V6 carburetor families over the years, and WMV and WMH parts should not be assumed to be interchangeable.
Please search for our CARB ID article and photos in the Tech Hub to ID your Carbs as needed.
Common Engine Applications
This WMV rebuild kit is commonly used on many carbureted Mercury and Mariner V6 two-stroke applications, including 2.5 Liter 135 HP, 150 HP, XR6 / Magnum III, 175 HP, 200 HP, and related Jet, SportJet, and performance applications where the carburetor number matches the WMV family.
Since these engines are now decades old, carb swaps are common. Always check the carburetor number before ordering, especially if the engine has been rebuilt, modified, or assembled from multiple parts.
What This Kit Is For
Older WMV carburetors often develop problems from varnish, ethanol residue, dried gaskets, worn needle-and-seat parts, storage corrosion, and debris in small fuel and air passages. When that happens, the engine may idle rough, hesitate during acceleration, load up at low speed, run rich, drip fuel, or become hard to start after sitting.
A correct rebuild kit helps restore sealing and fuel control without mixing random pieces from a generic carb kit. It is meant for a proper carburetor refresh where the carb body is cleaned, inspected, and reassembled with the correct service parts.
Why the Needle and Seat Matter
The needle and seat assembly controls fuel entering the carburetor bowl. If the needle is worn, dirty, grooved, or varnished, the carburetor can flood, leak, or meter fuel inconsistently. Common symptoms include hard starting, rough idle, fuel dripping, rich running, and uneven fuel delivery.
Replacing the needle and seat is one of the most important parts of a real WMV carburetor rebuild. A new gasket alone will not fix poor fuel control if the needle, seat, float, or fuel bowl area is worn, dirty, or incorrectly adjusted.
Cleaning the Carburetor Properly
A rebuild kit only works as well as the cleaning behind it. WMV carburetors use small idle, off-idle, main, bowl vent, and back-draft circuits to meter fuel correctly. If one small passage stays restricted, the engine can still idle poorly, bog on throttle, sneeze, load up, or run unevenly after the rebuild.
During the rebuild, the jets, emulsion tubes, fuel bowl, fuel inlet area, idle circuits, off-idle passages, and drilled passages should be cleaned, rinsed, blown dry, and verified before reassembly. Do not simply install new gaskets over dirty passages and expect the carburetor to perform correctly.
Float Height Is Critical
Float height directly affects fuel level inside the carburetor bowl. If the float level is too high, the carburetor can flood, drip fuel, run rich, or load up at idle. If the float level is too low, the engine can hesitate, run lean, or starve for fuel under load.
Inspect the float for damage, swelling, sticking, or fuel saturation before final assembly. Even a new needle and seat will not perform correctly if the float is bent, sticking, or adjusted incorrectly.
Rebuild All Three Carburetors Together
Most Mercury / Mariner V6 carbureted engines use three carburetors. For the best result, rebuild all three at the same time so fuel delivery stays consistent across the engine.
Before removing the carburetors, mark the top, middle, and bottom carb locations.
Reinstalling each carburetor in its original position helps avoid confusion during reassembly and setup. After the rebuild, inspect all fuel lines, fittings, clamps, primer bulb connections, and bowl areas for leaks before running the engine.
Ordering Note
Each package includes one (1) WMV Carburetor Rebuild Kit. A complete three-carb Mercury / Mariner V6 service normally requires three (3) kits total.
For best results, confirm that your carburetor is a WMV-series carburetor, match the kit number, clean every passage, inspect the float and bowl, set the float heights correctly, and rebuild all three carburetors together for the most reliable result.
Feel free to contact Mike Hill at +1-714-697-1716 or mike@buckshotracing77.com for racer-level experience and the best technical support.