In Stock Spark Plug 4955850 4937472 5473010 Compatible with Cummins C8.3 ISB5.9G L9N

Ready to Ship — Guangzhou warehouse holds stock of these natural gas engine spark plugs so a single failed unit does not hold up your machine.

Technical Specifications

Application Suitability

What Gets the Machine Running Before the Weekend Ends

A Spark Plug 4955850 in stock fast shipping replacement is sitting on our Guangzhou shelf right now, boxed and ready to move.

The machine is already down. You pulled the plug, the ceramic is cracked, and the number stamped on the shell is half-gone from heat cycling and carbon buildup. You send a photo to three suppliers. Two ask for a minimum order of eight pieces. The third quotes a lead time that assumes you have weeks to wait. Meanwhile the excavator sits on the jobsite, the crew is reassigned, and the project timeline shifts. [NEED_CITE: typical cost of unplanned equipment downtime in construction operations]

I have handled enough of these calls from the warehouse floor to know that a single Spark Plug 4955850 in stock fast shipping replacement is usually the difference between a machine running Monday morning and a machine sitting idle through the week. That is why this SKU is flagged for priority dispatch.

How We Get It Out the Door Today

When a workshop supervisor messages at night with a blurry photo of a fouled plug, the first step is confirming the engine model. ISB5.9G, ISC8.3, or L9N — each takes this Spark Plug 4955850 in stock fast shipping replacement. Once the model is confirmed, the piece is pulled from stock, photographed against the order, and packed within the same handling cycle. No bulk commitment required, no waiting for a full carton to be broken.

Arrival Timing You Can Plan Around

Shipping is where most delays hide. Express, air, and sea freight each carry different transit windows, and the right choice depends on how fast the machine must move again. A single Spark Plug 4955850 in stock fast shipping replacement ships in a padded carton rated for courier handling. Tracking numbers go out the moment the carrier scans the parcel at the Guangzhou depot, so the repair bay knows exactly when to schedule the install. [NEED_CITE: international courier transit time expectations from South China hubs]

What the Numbers on the Box Actually Mean

The ceramic insulator is rated to withstand combustion chamber temperatures reaching 1200°C, which matters because natural gas engines like the C8.3 G and QSL9 G run lean and hot compared to diesel counterparts. The copper electrode core conducts heat away from the firing tip, helping the plug stay within its thermal window across load swings. Nickel plating on the shell resists the sulfur compounds present in some natural gas supplies, keeping the threads free for removal at the next service interval. Thread accuracy holds to 0.01mm, which prevents cross-threading in aluminum cylinder heads that have already seen one removal too many.

The Cost of Grabbing the Wrong Plug Off the Shelf

A spark plug that fires weakly or not at all on one cylinder means unburnt gas passes straight into the exhaust. On a natural gas engine with a catalytic converter, that unburnt fuel cooks the substrate, turning a small ignition problem into an emissions system replacement. I once traced an ISL G misfire to a plug with the wrong heat range — it looked identical, threaded in fine, but the electrode ran too cold and carbon-fouled within days. The machine went down twice before the correct part arrived. [NEED_CITE: consequences of incorrect spark plug heat range in natural gas engines]

Why Buyers Keep This Line on Speed Dial

Our Guangzhou warehouse stocks this Spark Plug 4955850 in stock fast shipping replacement alongside other high-turnover ignition and engine auxiliary items, so a second failure does not mean a second order from a different supplier. One-piece minimum means an emergency single-cylinder repair is never blocked by a carton quantity. Part identification works from an engine model, a worn number, or a nameplate photograph — whichever is fastest for the person on the shop floor. Cross-reference verification catches superseded and alternate numbers before the parcel ships, and a technical team member is available to confirm compatibility and heat-range grade when the application is unclear.

Documentation & Verification

• Commercial invoice and packing list listing each plug by part number and engine application
• Cross-reference sheet mapping 4955850, 4937472, and 5473010 marked as reference only
• Dimensional and visual inspection record captured before dispatch
• Warranty terms covering manufacturing defects for 3 to 12 months
• Packing photograph showing each unit protected before crate closure
• HS code and customs paperwork prepared for cross-border shipment

Stock, Shipping & Arrival

• Shelf stock confirmed before invoicing so lead times reflect real availability
• Express, air, and sea options quoted with estimated arrival windows at inquiry stage
• Padded single-unit carton protects ceramic insulator during courier transit
• Tracking number issued at carrier scan, not at label print
• Arrival confirmation requested from buyer to close the dispatch loop

Send What You Have and We Will Confirm the Rest

Drop the part number if it is legible, or photograph the existing plug from two angles — electrode tip and thread base. If the number is gone, send the engine model plate. We will cross-check compatibility against your specific CM2180, CM556, or CM2380 variant and confirm stock status and dispatch timing in the same reply.

Frequently Asked Questions

Q: Is this spark plug currently in stock and when can it ship? A: Yes, this Spark Plug 4955850 in stock fast shipping replacement is held in our Guangzhou warehouse for immediate pull. Orders confirmed before the daily cutoff typically dispatch the same cycle. Express and air freight transit windows are quoted at inquiry so you know the arrival date before committing.

Q: What is the minimum order — can I buy just one piece? A: The minimum order is one piece. We break cartons for emergency single-cylinder repairs, so a workshop needing one plug does not have to buy eight. The same quality inspection and packing standard applies whether the order is one unit or one hundred.

Q: How long does delivery take to my country by express or air? A: Express courier from Guangzhou typically reaches major international destinations within a few business days, while air freight adds transit and customs handling time. Exact windows depend on destination and carrier schedule, both confirmed with a date range when we quote.

Q: My nameplate is unreadable — can I send a photo for identification? A: Send a clear photo of the existing plug, the engine data plate, or both. Our team cross-references the image against known variants for ISB5.9G, ISC8.3, L9N, and other compatible Cummins natural gas engines to confirm the correct part before anything ships.

Q: What happens if the plug I receive doesn't match my engine? A: Contact us immediately with photos of the received unit alongside your engine details. We verify the cross-reference, identify the discrepancy, and arrange a replacement dispatch. The 3-to-12-month warranty covers manufacturing defects on every unit we ship.