OMC Johnson Evinrude NEW OEM 328542 Orifice Plug 47D High Speed Carb Jet 0810

OMC Johnson Evinrude Orifice Plug #47D — Part Number 328542

Brand: OMC Johnson Evinrude | Condition: New Old Stock (NOS)

Genuine OMC high-speed orifice plug, size designation 47D, part number 328542. This is the main metering jet in a Johnson or Evinrude outboard carburetor — the brass plug with the precision-drilled orifice that controls how much fuel the carburetor delivers at wide-open throttle. Everything about how your motor runs at speed passes through this one hole. OMC identified these plugs by a stamped size code rather than by engine model, because the correct orifice depends on the specific carburetor, the engine’s state of tune, and the altitude it runs at. This part is No Longer Available from BRP — the factory number is discontinued and dealers return it as dead. For anyone rebuilding a carburetor who needs the 47D specifically, new stock is the only correct answer, and new stock is what this is.

Condition Details

New Old Stock — never installed, never run, never had fuel through it. This orifice plug has been sitting in dealer or distributor inventory and is sold exactly as it came off the shelf. The critical surface on a jet is the drilled orifice itself, and on an uninstalled plug that orifice is clean, round and unworn — which is precisely the thing you cannot get from a used jet at any price. Packaging may show shelf wear, dust, handling creases, faded printing, old price stickers, or shelf dirt from long-term storage, and OMC small parts like this one were frequently broken out of bulk packaging by dealers, so the bag or envelope may be a dealer repack rather than a sealed factory bag. The brass may carry light storage tarnish. None of that touches the orifice. If you want a correct, unworn 47D jet and do not care about the cosmetics of its packaging, this is the listing for you.

Specifications

• Part Type: Carburetor high-speed orifice plug / main metering jet
• OMC / BRP Part Number: 328542 (also written 0328542)
• Size Designation: 47D (OMC orifice size code, stamped on the plug)
• Material: Brass
• Location: Carburetor high-speed (main) fuel circuit
• Status: No Longer Available from the manufacturer
• Sold As: See photos for exact package contents and quantity
• Condition: New Old Stock

OMC never published a drilled-diameter figure for the 47D plug, and no distributor lists one — the stamped size code is the specification, which is how jets are ordered and matched. Some retailers show this part as “2 × 2 × 1 inches,” which is a packaging-template default and not a measurement of a thumbnail-sized brass plug, so it is not reproduced here. If you need the external dimensions or the hex/wrench size to compare against the plug in your carburetor, message me and I will measure the actual part.

Superseded & Cross Reference Part Numbers

• OMC 328542
• OMC 0328542 (BRP seven-digit form of the same number)

There is no supersession on this part — OMC never replaced the 47D with a newer number, which is exactly why it went No Longer Available instead of being reassigned. If your OMC parts book, carburetor exploded view, or service manual calls for 328542 or orifice size 47D, this is your part and there is no current substitute.

Features

• Genuine OMC factory part, not an aftermarket or drilled-out substitute
• Discontinued and No Longer Available from BRP — no current production, no replacement number
• Correct 47D orifice size as specified by OMC for its application
• Factory-drilled orifice: round, unworn, and dimensionally correct
• Brass construction, unaffected by decades of dry shelf storage
• Unused — no varnish, no ethanol residue, no corrosion inside the orifice
• The one carburetor component you genuinely should not buy used

Application

Johnson and Evinrude outboard carburetors specified by OMC to use orifice size 47D. OMC did not publish an engine-by-engine list for individual orifice plugs, and no distributor publishes one either — jets were catalogued by size code because the same orifice size crosses multiple engine families, and because OMC specified different orifice sizes for the same engine depending on altitude and application.

The correct way to confirm this part is by number, not by horsepower. Check your engine’s carburetor parts diagram or service manual for part number 328542 or orifice size 47D, or read the size code stamped on the plug you are replacing. If you give me your engine model and serial number I am happy to help you check, but please verify against your own parts diagram as well — fitting the wrong orifice size changes the air/fuel ratio at full throttle, and running lean at wide-open throttle is how two-stroke outboards get damaged. Match the number and you are safe.

Why Choose OMC Johnson Evinrude?

A metering jet is one of the few engine parts where “close enough” is genuinely not good enough. The orifice in this plug was drilled and gauged to an OMC specification, and that specification was arrived at by testing the engine it belongs to. The common alternative — taking a jet of a nearby size and opening it up with a numbered drill or a piece of wire — produces an orifice with a rough bore and an unknown flow coefficient, and it cannot be undone. The other common alternative is a used jet pulled from a motor of unknown history, where the orifice has spent years in ethanol-blended fuel and may be eroded, varnished, or already been drilled by a previous owner. Neither of those is a repair. A genuine, unused, correctly-sized OMC orifice plug is, and since this number is discontinued, unused factory stock is the only place left to get one.

Returns

30-day return policy. If this part is not right for your application, open a return request through eBay within 30 days of delivery and I will take care of it. Please confirm fitment by part number before ordering where you can — I am happy to help you check.

Thank you for looking at this listing. QBS Parts, Inc has been supplying hard-to-find and discontinued marine, industrial and engine parts for years, and we know that when you are mid-job on a boat the part you need is the part you need. Everything we list is inspected before it goes out the door and described as honestly as we can describe it.

If anything about this part is not what you expected, or if you have a question about fitment, measurements, or what is in the package, please contact us first and give us the chance to make it right. We would much rather solve a problem for you directly than have you leave feedback about one. A message gets answered quickly and we will do whatever we reasonably can to sort it out.

QBS Parts, Inc — Gardena, CA