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SKU:
NLT1R00150
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Twin Mikuni SBN Carburetor Rebuild Kits for Sea-Doo 650 720 787 800
$28.99
In Stock
$28.99
Sale price
$28.99
Regular price
Two-carburetor rebuild package for compatible Sea-Doo watercraft and boats equipped with twin square-body Mikuni SBN 38, 44, or 46 mm carburetors.
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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
- Sea-Doo GSX models equipped with twin Mikuni SBN carburetors
- Sea-Doo GTX models equipped with twin Mikuni SBN carburetors
- Sea-Doo HX and XP models equipped with twin Mikuni SBN carburetors
- Sea-Doo SPX models equipped with twin Mikuni SBN carburetors
- Sea-Doo Challenger and Challenger 1800 boats equipped with a compatible twin-carb 650, 717/720, or 787/800 engine
Product Overview
Twin-carb Sea-Doos demand more than cleaning one dirty bowl. Both carburetors must pump and meter evenly, throttle plates must synchronize, pop-off settings must agree, and the fuel lines, selector, tank pickup, pulse supply, oiling, and cooling systems must be safe before the engine is loaded.
This package supplies soft parts for two Mikuni SBN carburetors, including common diaphragms, gaskets, O-rings, check valves, and internal filters as pictured. Needles, seats, and jets are separate unless shown, and the original calibration should be recorded before disassembly.
Key Features & Performance
- Two rebuild kits for a complete twin-carburetor service
- Fits matching square-body Mikuni SBN 38, 44, and 46 mm carburetors
- Supports synchronized rebuilding after stale-fuel or diaphragm damage
- Cross-references common Sea-Doo service-kit families 270500284 and 270500302
Replaces Part Numbers
- 270500284
- 270500302
Common Uses
- Rebuilding both carburetors after ethanol or storage damage
- Replacing hardened fuel-pump and metering diaphragms
- Cleaning both internal filters during a fuel-system overhaul
- Correcting uneven cylinder fueling after synchronized diagnosis
Technical Specifications
- Product Type: Twin Carburetor Rebuild Package
- Coverage: 2 carburetors
- Carburetor Family: Square-body Mikuni SBN 38/44/46 mm
- Needles and Seats: Not included unless pictured
- Jets: Not included
- Condition: New aftermarket
Installation & Fitment
- Confirm the engine actually uses two compatible Mikuni SBN carburetors
- Rebuild both units together and record jet, spring, and adjustment positions
- Replace unsafe fuel lines and service the selector, pickup, pulse lines, and filters
- Set pop-off pressure, synchronize throttles and oil-pump indexing, then pressure-test before water use
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: Does this package rebuild both carburetors? A: Yes. It is arranged as two kits for a twin-carb system, assuming both installed carburetors are the matching Mikuni SBN type.
Q: Why must the carburetors be synchronized after rebuilding? A: Unequal throttle opening or mixture delivery can make one cylinder run leaner and increase the risk of engine damage.
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 twin carb rebuild kit, two Mikuni SBN kits, Sea-Doo 787 carburetor service, 720 dual carb kit, 270500284 diaphragm kit, Sea-Doo 800 fuel system repair
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.