---
product_id: 168307678
title: "For Generac Kohler Onan Gas Diesel Generator Fuel Pump, MD7781, 12 Volt 4-7 PSI Flow up to 25-35 GPH Output, Self-Priming Electric Low Pressure Fuel Pump"
brand: "tikscience"
price: "€ 53.06"
currency: EUR
in_stock: true
reviews_count: 9
category: "Tikscience"
url: https://www.desertcart.gr/products/168307678-for-generac-kohler-onan-gas-diesel-generator-fuel-pump-md7781
store_origin: GR
region: Greece
---

# 12V electric power 4-7 PSI low pressure flow 25-35 GPH fuel output For Generac Kohler Onan Gas Diesel Generator Fuel Pump, MD7781, 12 Volt 4-7 PSI Flow up to 25-35 GPH Output, Self-Priming Electric Low Pressure Fuel Pump

**Brand:** tikscience
**Price:** € 53.06
**Availability:** ✅ In Stock

## Summary

> ⛽ Fuel your freedom with flawless flow — never get left powerless!

## Quick Answers

- **What is this?** For Generac Kohler Onan Gas Diesel Generator Fuel Pump, MD7781, 12 Volt 4-7 PSI Flow up to 25-35 GPH Output, Self-Priming Electric Low Pressure Fuel Pump by tikscience
- **How much does it cost?** € 53.06 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/168307678-for-generac-kohler-onan-gas-diesel-generator-fuel-pump-md7781)

## Best For

- tikscience enthusiasts

## Why This Product

- Trusted tikscience brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built to Last:** Corrosion-resistant alloy steel housing extends pump life 4-5x beyond competitors.
- • **Plug & Play Fitment:** Universal self-priming design fits Kohler, Onan, Generac models with easy installation.
- • **Precision Fuel Flow:** Maintains optimal 4-7 PSI pressure ensuring smooth, vapor-lock-free operation.
- • **High Capacity Output:** Pumps up to 35 gallons per hour, keeping your RV or generator running longer.
- • **Effortless Power Boost:** Delivers consistent 12V electric power for seamless generator fuel supply.

## Overview

This 12V self-priming electric fuel pump delivers a reliable 4-7 PSI pressure and up to 35 GPH flow, engineered for Kohler, Onan, and Generac generators. Crafted from corrosion-resistant alloy steel, it ensures long-lasting performance and easy installation, making it the ultimate upgrade for RVs, APUs, and diesel or gas generators.

## Description

Low Pressure Fuel Pump or fuel transfer pump for Generators RV or APU Gas or Diesel, and for Onan, Kohler and Generac Generators.Part Number:MD7781Replaces for Kohler:249862, 278490, 277818, GM39462 & 55-25-559-01-5Replaces for Generac:42700 (042700), 74939 (074939), 77663 (077663), 90475 (090475)Replaces for Onan:149-2620, A029F887, A029F893, A029F891, 149-2331, 149-2140, 149-2163, 149-2036, 149-2145Fitment:For Kohler Popular RV Models:Model 4.5CKM, Engine Model: Kohler KT17(Spec Number Range 10111A through 10131A)Model 4.5CKM Power Boost (TM) (Engine: KT)(Spec Number range 10151 Through 10185)Model 4CKM and 5CKM and 4/5 CKFM (Spec Number Range101203 Through 101360For Kohler Popular Marine Models:Model 5E, 4EF, 7.3E, 6EF, 5ECD, 7.3ECD, 6EFCD, Engine: Kawasaki, FD501DModel 3.5/5 CFZ and 4/6.5CZ, Engine Honda G360, Spec Number Range 125201-12523Model 3.5/5 EFZ and 4/6.5 ESZ, Spec Number range 125237-125261 Fuel Pump benefits from - No Extended Cranking in order to start engine after running out of fuelFeature:Long Life: No bearing or diaphragms to wear out of fatigue. Lasts four to five times longer than many other electric pumps available in the market.Corrosion resistant: The steel case is plated for corrosion resistance, thus provides longer life.Universal Size: Fits to all carburettor equipped cars/vans and light trucks.Eliminates Vapor Lock: When these pumps are properly installed on most vehicles a constant, smooth, dependable supply of fuel under pressure is assured in the hottest weather or at highEasy Installation: To get the best results, it is recommended to mount the pump close to the fluid/fuel tank and below the liquid levelPackage:1 x 12V Fuel Pump2 x Screws

Review: Perfect fit for my rv generator - Installed, generator works great now.
Review: Works great - Was an exact replacement for the original one and works great. Good value.

## Features

- Fitment - 12 Volt 4-7 PSI Flow up to 25-35 GPH Output. Self-Priming Universal Electric Low Pressure Fuel Pump or fuel transfer pump for Generators RV or APU Gas or Diesel, and for Onan, Kohler and Generac Generators.
- Replaces for Kohler - 49862, 278490, 277818, GM39462 & 55-25-559-01-5
- Replaces for Generac - 42700 (042700), 74939 (074939), 77663 (077663), 90475 (090475)
- Replaces for Onan - 149-2620, A029F887, A029F893, A029F891, 149-2331, 149-2140, 149-2163, 149-2036, 149-2145
- [Customer Service] - We offer 2-year service, hassle-free return and money back policy, buy with confidence! You will get a Generator Fuel Pump and two screws

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07VQXJYB8 |
| Auto Part Position | Front |
| Best Sellers Rank | #227,240 in Automotive ( See Top 100 in Automotive ) #1,065 in Automotive Replacement Electric Fuel Pumps |
| Body Material | Alloy Steel |
| Brand | TIKSCIENCE |
| Customer Reviews | 4.0 4.0 out of 5 stars (191) |
| Date First Available | July 25, 2019 |
| Exterior | Smooth |
| Fit Type | Vehicle Specific Fit |
| Gas Type | diesel,gas |
| Inlet Connection Type | screws |
| Item Weight | 1.09 pounds |
| Item model number | 12V Fuel Pump APU RV |
| Manufacturer | 12V Fuel Pump APU RV |
| Manufacturer Part Number | MD7781 |
| Material | Alloy Steel |
| Model | Self-Priming Low Pressure Fuel Pump |
| Mounting Type | Front Mount |
| OEM Part Number | 49862, 278490, 277818, GM39462 & 55-25-559-01-5, 42700 (042700), 74939 (074939), 77663 (077663), 90475 (090475), 149-2620, A029F887, A029F893, A029F891, 149-2331, 149-2140, 149-2163, 149-2036, 149-2145 |
| Operation Mode | Electric |
| Package Dimensions | 4.65 x 3.39 x 2.83 inches |
| Specification Met | OE |
| Style | 12V Fuel Pump APU RV |
| UPC | 752498075458 |
| Vehicle Service Type | for Kohler Popular RV Models; for Kohler Popular Marine Models |
| Voltage | 12 Volts |

## Product Details

- **Brand:** TIKSCIENCE
- **Fit Type:** Vehicle Specific Fit
- **Item Weight:** 0.49 Kilograms
- **Material:** Alloy Steel
- **Vehicle Service Type:** for Kohler Popular RV Models; for Kohler Popular Marine Models

## Images

![For Generac Kohler Onan Gas Diesel Generator Fuel Pump, MD7781, 12 Volt 4-7 PSI Flow up to 25-35 GPH Output, Self-Priming Electric Low Pressure Fuel Pump - Image 1](https://m.media-amazon.com/images/I/61yqANkbgRL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Perfect fit for my rv generator
*by A***R on November 20, 2025*

Installed, generator works great now.

### ⭐⭐⭐⭐⭐ Works great
*by R***. on September 5, 2022*

Was an exact replacement for the original one and works great. Good value.

### ⭐ Does not work
*by L***Z on November 23, 2023*

Received the pump on time, but i didn’t have time to mess with my generator until a month after, just to realize that the pump does not work at all, and now i cant return the item anymore. Complete waste of time and money.

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*Product available on Desertcart Greece*
*Store origin: GR*
*Last updated: 2026-03-10*