WSM Carburetor/Fuel Pump Rebuild Kit
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Restore carburetor performance with the WSM Aftermarket 38/40MM Square Pump Rebuild Kit. This direct replacement kit includes all necessary diaphragms, gaskets, and hardware required to disassemble and rebuild Mikuni BN34, BN38, BN44, and BN46 square and round pump watercraft carburetors. It supports Yamaha, Sea-Doo, Tigershark, and Polaris 1990-2014 applications, covering 218 verified vehicle fitments including models like the Yamaha SuperJet SJ700, Sea-Doo GTI 720, Kawasaki 800 SX-R, Yamaha WaveRunner III, and Sea-Doo SP 580.
Kits are sold per carburetor, and needle and seats are sold separately. You must determine the model size of your carburetor, as fitment charts list options by carburetor model size. Check the fitment chart for exact year, make, and model details before ordering.
What shipping options are available?
Online orders will be shipped through FedEx, USPS, OnTrac, or other reputable shipping services based on what we determine to be the best option. We (do not) ship to P.O. boxes. Please contact us if you are interested in an expedited shipping on your order.
Do you ship outside of the USA?
No, unfortunately at this time we only ship to the lower 48 states in the USA.
Do you ship to Alaska and Hawaii?
Yes, we do ship to Alaska and Hawaii.
What could cause a shipping delay?
Shipping delay can occur when the wrong address or zip code is submitted for the shipping address. If the shipping company can not deliver the package we will contact you via phone or email.
During the holiday season shipping delivery may vary.
How do I return an item?
Please log in to your account and go to the order to request a return. Items can be returned within 30 days after delivery. Items must be in new/unused condition with all of the original packaging. If you purchased the package protection, returns are free. If you did not, customers who make a mistake with their order are responsible for return shipping costs. Discounted return labels will be provided for those and subtracted from the refund. If we have made a mistake, please email with
pictures of what you received including the part number and the year, make and
model of your machine if applicable. If we determine we made an error we will
cover the return shipping.
If an item needs to be returned the shipping fees are the customer's responsibility.
Amount of refund will be based on the purchase price of your product.