MIKUNI Carb Carburetor Rebuild Kit MK-BN38/44 SPR for Kawasaki Polaris TigerShark Yamaha Sea-Doo Watercraft
This carburetor is engineered as a direct replacement for the Kawasaki Polaris TigerShark Yamaha Sea-Doo Watercraft. Manufactured to meet or exceed OEM specifications, it delivers reliable performance in demanding conditions. Each unit is tested for fuel flow, pressure rating, and durability before leaving the factory to ensure consistent quality across every order.
Vehicle Compatibility
| Application | Details |
|---|---|
| Polaris TigerShark Yamaha Sea | Doo Watercraft Replacement Part Number: MK-BN38/44 SPR, MKBN38/44SPR Applications:Fit for following models: Kawasaki Watercraft: Jet Ski 750 SXi 1996Jet Ski 800 SXR 2003-2011Jet Ski SXI Pro 1998-2002 |
Replaces OEM Part Numbers
MK-BN38 • MKBN38 • 44SPR • 1998-2002 • 1997-1998
Signs You Need a Replacement
If your equipment is showing any of these symptoms, the carburetor may be the cause:
- Engine floods easily — The float valve isn’t seating properly, allowing fuel to overflow into the bore. The engine loads up with fuel and won’t start until it clears.
- Lean surging at cruise speed — A blocked main jet or partially clogged passage causes the engine to run lean under steady throttle. It surges as the mixture alternates between lean and rich.
- Black smoke and rich smell — Too much fuel relative to air. Check the choke mechanism, float level, and jet sizes if the carburetor has been modified.
- Fuel dripping from the carburetor — A worn needle and seat or stuck float allows fuel to overflow. This is a fire hazard and should be fixed immediately.
- Hard starting when cold — The choke circuit may be blocked or the enrichment valve stuck. Cold-start problems on a carbureted engine almost always trace back to the choke.
- Inconsistent idle speed — The idle mixture screws may need adjustment, or there’s a vacuum leak at the carburetor base gasket.
Rebuild Tips
Before installing the new carburetor, clean the manifold surface and check the gasket for any damage or vacuum leaks. Set the idle mixture screws to the baseline position (typically 1.5 turns out from fully seated) before starting. After starting, warm the engine to operating temperature, then fine-tune the mixture screws for the highest smooth idle. Adjust the idle speed screw last. If the engine backfires through the carburetor, check the valve adjustment and ignition timing.
Frequently Asked Questions
Which Polaris models does this part fit?
Refer to the Vehicle Compatibility table above for the full list of Polaris models. Each listing includes the body type, engine, and production years. Match your vehicle’s engine code (stamped on the engine block) against the listed codes to confirm.
Can I cross-reference MK-BN38 with MKBN38?
Yes. Both MK-BN38 and MKBN38 are interchangeable OEM numbers for this part. They refer to the same component with the same specifications, just different part number revisions.
How do I check if my engine code (BN38, MKBN38) matches?
The engine code is stamped on a metal tag attached to the engine block, usually near the timing belt cover or on the cylinder head. Compare the code you find with the list above. Engine codes are 3 to 6 characters long.
My vehicle is a 2003 model – is it covered?
The compatibility range for this part includes 2003-2011. The 2003 model year falls within this range, but verify the engine code and body type match. Mid-year production changes sometimes mean two vehicles from the same model year use different parts.
Reviews
There are no reviews yet.