How do I confirm pilotpart889875 fits my machine?

Compare the OEM or reference part number, machine model, engine model, and serial number. You can also submit a fitment inquiry before ordering.

In Stock

Diaphram Tool Kit 91-889431 for Mercury Marine Outboard 2.5 L 3.0 L Optimax

For Mercury Tools

Tools 91-889431 for Mercury

OEM / REF: 91-889431SKU: pilotpart889875

Diaphram Tool Kit 91-889431 for Mercury Marine Outboard 2.5 L 3.0 L Optimax is a Tools replacement part for Mercury Tools and Accessories, categorized under Tools and Accessories > Tools. Use OEM part number 91-889431 and confirm machine model, engine model, and serial details before checkout.

Stock: In stock
Condition: New
Fitment: Mercury Tools and Accessories
Category: Tools

Fitment support before you order
Worldwide delivery options

In stock — ready to order

$78.00USD/EA

Estimated delivery by quantity

Estimated delivery windows
Qty	Estimated delivery
1	Sep 23 – Sep 30
10	Sep 21 – Sep 28
50	Sep 19 – Sep 26

Estimates from today; confirm exact lead time before payment.

Quantity

Buy online now or add to your quote list for bulk pricing and fitment confirmation.

Confirm fitment before ordering →

Lead times can vary by freight route and customs. Contact support for expedited shipping.

Tools Description

This Tools is indexed for Mercury Fit For Mercury Marine Outboard:2.5 L Optimax, 3.0 L Optimax. Compare reference number 91-889431 against the label on your existing Mercury component before ordering.

Additional cross references on file: 889431. If your machine plate shows a different number, submit a fitment inquiry with photos before checkout.

Part Numbers and Cross References

91-889431 889431

Applications

Mercury Fit For Mercury Marine Outboard:2.5 L Optimax, 3.0 L Optimax

Fitment Notes

Brand or application signal: Mercury Tools and Accessories
Product family: Tools
System category: Tools and Accessories > Hand Tools > Tools
Recommended verification: OEM number, engine model, serial number, old part photos, and dimensions.

Shipping & Returns

Availability: InStock
Shipping: Shipping quotes can be confirmed before payment for heavy or urgent orders.
Returns: Returns are easier when fitment is confirmed before ordering.
B2B support: Bulk, fleet, and repair-shop requests can be handled through the inquiry form.

Frequently Asked Questions

How do I confirm this part fits my machine?

Match the OEM or reference number first, then verify machine model, engine model, serial number, connector layout, mounting points, and old part photos.

Can I order if my part number is not listed?

Yes. Send the old part number, machine plate, and photos through the fitment inquiry form. Support can review possible replacements or alternatives.

Is this an OEM part?

Products are indexed as replacement parts unless explicitly marked otherwise. Always compare reference numbers and confirm fitment before purchase.