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Mercury Fuel Pump Isolator
Mercury 75-115 EFI / Verado 135-300 Fuel Pump Isolator 880596509
This OEM Mercury isolator is used in Mercury fuel module lift pump applications that use OEM fuel pump kit number 880596T58. It is commonly purchased with the matching Mercury seal 880596510 when servicing the lift pump area of the fuel module.
Fitment should be verified by engine model, serial number, and OEM part number before ordering. Pro Marine also offers related lift pump options for this application, including pump-only and pump-with-seals configurations.
Compatible Applications
| Engine Family | Application | Fitment Note |
|---|---|---|
| Mercury / Mariner 75-115 EFI 4-stroke | Fuel module lift pump service | Used with fuel pump kit 880596T58. Verify serial number and parts diagram. |
| Mercury / Mariner Verado 135-300 4-stroke | 4-cylinder and 6-cylinder lift pump applications | Used with related 880596T58 lift pump applications. Confirm exact model and serial. |
Important Fitment Note
OEM number 880596509 is an isolator used in the fuel module assembly with lift pump kit 880596T58. Because Mercury fuel module parts can vary by serial range, confirm your engine serial number and compare your parts diagram before ordering.
OEM & Cross Reference Numbers
| Mercury OEM Number | 880596509 |
|---|---|
| Part Description | Isolator |
| Related Mercury Seal | 880596510 |
| Related Lift Pump Kit | 880596T58 |
| Pro Marine Pump Numbers | 80596-58P, 80596-58 |
What This Part is Used For
The 880596509 isolator helps position and isolate the lift pump in the Mercury fuel module assembly. When replacing or servicing the lift pump, inspect the related seal and surrounding fuel module components so the pump is supported and sealed correctly.
Related Fuel Pump Parts
Seal for 80596-58
OEM Mercury seal 880596510 used with this lift pump service area.
View Seal 880596510
Pro Marine Fuel Pump Lift
Aftermarket lift pump for Mercury 75-115 4-stroke and Verado 135-300 applications using 880596T58.
View Pump 80596-58P
Pro Marine Fuel Pump Kit with Seals
Pro Marine lift pump kit option for Mercury 75-115 4-stroke and Verado 135-300 4 and 6 cylinder applications.
View Pump Kit 80596-58Key Features and Benefits
- OEM Mercury Marine isolator for fuel module lift pump service.
- Used with related Mercury lift pump kit number 880596T58.
- Pairs with Mercury seal 880596510 when servicing the same pump area.
- Helps support proper lift pump positioning inside the fuel module assembly.
- Best matched by OEM number, engine serial number, and parts diagram.
Service Kit Details
| Item Number | 880596509 |
|---|---|
| Manufacturer Item | 880596509 |
| Manufacturer | Mercury Marine |
| Product Type | Fuel pump isolator |
| Fuel Pump Type | Electric fuel module lift pump application |
FAQ
Is 880596509 the lift pump?
No. 880596509 is the isolator used with the lift pump area. The related lift pump kit number is 880596T58.
Does this go with seal 880596510?
Yes. Seal 880596510 is a related Mercury fuel module seal commonly serviced with this pump area.
Will this fit every Mercury 75-115 or Verado 135-300?
Not automatically. Mercury fuel module parts can vary by model and serial number, so verify your serial number and OEM parts diagram before ordering.
Dealer Discounts & Store Policies
Dealer / Marine Industry Discounts
Are you a marine dealer, technician, boat builder, or industry professional? We offer dealer pricing for qualified marine businesses.
Shipping Policy
- Free shipping on orders over $100 continental U.S.
- Orders ship via UPS, USPS, and FedEx.
- Orders received before 5:30 PM EST ship the same business day.
- Typical delivery time is 1-5 business days.
30-Day Return Policy
- Returns accepted within 30 days of delivery.
- Parts must be new, unused, and in original packaging.
- Installed parts are not returnable.
- Return authorization is required before sending items back.
Need help with a return or order question?
Contact Us
Phone: 941-721-3000
Searchable Terms
Mercury fuel pump isolator, Mercury Verado lift pump isolator, Mercury 75 90 115 EFI fuel module isolator, Mercury fuel supply module isolator, Mercury lift pump seal parts.
Searchable Part Numbers
880596509, 880596510, 880596T58, 80596-58P, 80596-58
8184561