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SKU:
NLT1R01005
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Single Mikuni SBN Carburetor Rebuild Kit for Sea-Doo 580–800 Models
$22.99
In Stock
$22.99
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$22.99
Regular price
One-carburetor rebuild kit for compatible square-body Mikuni SBN 38, 44, and 46 mm carburetors used across the listed Sea-Doo 580 through 800 models.
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Compatible Models
We do our best to list all compatible models. Although this may be the part you need, your exact model may not appear below.
Compatible equipment / model
- 1997–2001 Sea-Doo GS
- 1997–1998 Sea-Doo GSI
- 1996–1998 Sea-Doo GSX
- 1996–2001 Sea-Doo GTI
- 1992–2001 Sea-Doo GTS
- 1992–1998 Sea-Doo GTX
- 1995–1997 Sea-Doo HX
- 1992–1998 Sea-Doo SP
- 1992–1996 Sea-Doo SPI
- 1993–1999 Sea-Doo SPX
- 1991–1997 Sea-Doo XP
- 1996–1998 Sea-Doo Challenger
- 1997–1999 Sea-Doo Challenger 1800
Product Overview
A Sea-Doo that has sat with ethanol fuel may show hard starting, bogging, unstable idle, or lean hesitation from stiff diaphragms and blocked internal filters. Rebuilding the original Mikuni can preserve correct calibration, but the fuel lines, selector, tank pickup, pulse line, pop-off pressure, and oiling system must be addressed too.
This package services one carburetor with internal gaskets, diaphragms, O-rings, check valves, and a small filter as supplied. Twin-carb watercraft require two kits; needle-and-seat assemblies and jets are not included unless the package photos specifically show them.
Key Features & Performance
- Services one square-body Mikuni SBN 38/44/46 mm carburetor
- Includes common soft parts, check valves, O-rings, and internal filter
- Supports rebuilding the original calibrated carburetor body
- Useful for ethanol damage, diaphragm aging, and contaminated fuel circuits
Replaces Part Numbers
- 270500284
- 270500302
Common Uses
- Rebuilding a carburetor affected by stale or ethanol-blended fuel
- Correcting stiff fuel-pump or metering diaphragms
- Cleaning a restricted internal carburetor filter
- Resealing a proven Mikuni SBN fuel-metering problem
Technical Specifications
- Product Type: Carburetor Rebuild Kit
- Carburetor Family: Square-body Mikuni SBN 38/44/46 mm
- Coverage: 1 carburetor
- Needle and Seat: Not included unless pictured
- Jets: Not included
- Engine Range: Listed Sea-Doo 580, 650, 717/720, and 787/800 applications
Installation & Fitment
- Identify the exact carburetor model and order one kit per carburetor
- Replace deteriorated fuel lines and clean the tank selector, pickup, and pulse system
- Use the Mikuni service sequence, set pop-off pressure, and preserve correct jet positions
- Pressure-test the fuel system and verify cooling and oil delivery before water testing
Compatibility Notice
Northline Parts does its best to list all known compatible models, but the correct part may fit an application not shown.
Model, production date, serial number, electrical or fuel-system version, dimensions, installed options, and previous repairs can affect fitment. Compare the original part and application information before purchase.
Frequently Asked Questions
Q: How many kits do I need for a twin-carb Sea-Doo? A: Two. This package rebuilds one carburetor, so each carb in a twin setup needs its own kit.
Q: Are the needle, seat, and jets included? A: Not in the standard contents described for this kit. Reuse or order the correct calibrated pieces separately after inspection.
Q: How do I confirm fitment before ordering? A: Match the original reference number where available, then compare the removed part, dimensions, connections, mounting details, model, serial or production information, and package photos.
Q: Is this an original-equipment part? A: No. This is a new aftermarket part. Brand names and reference numbers are used only to identify compatible applications.
Part Summary
keywords: Sea-Doo Mikuni rebuild kit, SBN 38 carburetor kit, Sea-Doo 720 carb rebuild, 787 twin carb service, 270500284 replacement, one carburetor diaphragm kit
Brand names, model numbers, and reference part numbers are used for identification and compatibility purposes only. Verify the original component, dimensions, and application before purchase.