Replacing Fuel Pump On Wisconsin Vg4d2 Engine: Step-By-Step Guide

The Wisconsin VG4D2 engine is a powerful and reliable piece of machinery, but even the best-engineered machines can experience problems from time to time. One common issue that owners of this engine may encounter is a malfunctioning fuel pump, which can lead to starting issues and poor performance. In this guide, we will walk you through the process of replacing the fuel pump on your Wisconsin VG4D2 engine, covering everything from sourcing the right parts to step-by-step installation instructions. We will also discuss some troubleshooting tips and tricks to help you identify and resolve any potential issues that may arise during the replacement process. By the end of this guide, you should feel confident in your ability to replace the fuel pump on your Wisconsin VG4D2 engine and get it running like new again.

Purchase a new fuel pump

When purchasing a new fuel pump for your Wisconsin engine vg4d2, it is important to ensure that you are getting the correct part for your specific engine model. According to Foley Engines, the Wisconsin 4 Cylinder Fuel Pump fits the following engine models: VH4D, VF4D, VE4D, W4-1770, VG4D, V461D, and V465D. This pump is supplied with a gasket and has received positive reviews for its ease of installation and effectiveness in improving engine performance.

You can also find this fuel pump on Amazon, along with other engine parts for the Wisconsin vg4d2. Amazon offers a range of delivery options, including free shipping on eligible orders. When shopping for a new fuel pump, be sure to compare prices, delivery options, and customer reviews to make an informed decision.

In addition to purchasing a new fuel pump, you may also want to consider buying a tune-up kit for your engine. This can help ensure that your engine is running optimally and can save you time and effort in the long run.

Before purchasing a new fuel pump, it is also worth considering whether you can repair or rebuild your existing fuel pump. In some cases, issues with the fuel pump may be due to stuck valves or a lack of oil in the gas, which can be resolved without replacing the entire pump. However, if your fuel pump is beyond repair, purchasing a new one is the best option to ensure the proper functioning of your engine.

Dismantle the old pump

To dismantle the old pump, start by removing the fuel line and the little priming rod attached to the pump. Take off the top half of the pump and check for any stuck disc valves. These valves may be stuck in their seats, so be sure to clean this area thoroughly. The alcohol in the gasoline can oxidize the aluminum in the pump, causing the discs to stick, so it's important to take preventative measures by adding a cup of oil to the gas when filling the tank. Motor oil or two-stroke oil can be used for this purpose.

Next, check the screen under the top hat of the pump. If the pump has a ruptured diaphragm, this will be the only other component to address, aside from the disc valves. However, it's important to also inspect the fuel line for any leaks, as an air leak can prevent the pump from functioning properly. Additionally, ensure that there is no fuel shut-off valve present, as this can impact the pump's ability to function.

If the pump is not functioning due to being mounted below the level of the tank, consider remounting the tank above the carburetor to eliminate the need for the fuel pump altogether. This setup was common in older configurations of similar engines. However, be sure to include a gas cutoff valve to prevent issues with the float valve in the carburetor.

Check the disc valves

To check the disc valves, start by removing the centre bolt in the fuel pump and filling it with gas. Next, take off the fuel line and hit the starter. If no fuel comes out, the disc valves may be stuck. Remove the top half of the pump and check if the disc valves are stuck in their seat. Take them out and clean the pump. The alcohol in the gas may have oxidised the aluminium in the pump, causing the discs to stick. To prevent this, put some oil in the gas when you fill it up. About a cup of motor oil or two-stroke oil per tank of gas should do it.

Clean the pump

To clean the pump of a Wisconsin engine, you will need to take it apart and clean it. This can be done by following these steps:

First, tap the little priming rod back into the pump base with some locktite. Then, take the top half of the pump off. You may find that one of the two little disc valves is stuck into its seat. Remove them and clean them. The alcohol in the gas can oxidize the aluminium in the pump, causing the discs to stick.

You can prevent this build-up by putting some oil in the gas when you fill it up. About a cup of motor oil or two-stroke oil per tank of gas should do it.

Replace the pump

How to Replace the Pump

To replace the fuel pump on a Wisconsin VG4D2 engine, follow these steps:

• Purchase a compatible fuel pump. Ensure it is compatible with the VG4D2 model, as well as other Wisconsin engine models such as VH4D, VF4D, VE4D, W4-1770, V461D, and V465D. You can find these pumps online or at specialist engine part retailers.
• Prepare the engine for the replacement. This may involve draining any remaining fuel from the tank and disconnecting the battery to reduce the risk of fire or electric shock.
• Locate the fuel pump. It is usually found near the fuel tank and is connected to the fuel lines that supply fuel to the engine.
• Disconnect the fuel lines from the pump. Be careful to catch any remaining fuel in a suitable container and properly dispose of it.
• Remove the old fuel pump. This may involve unscrewing or unbolting the pump from its mounting bracket or directly from the engine block. Take note of how the pump is mounted so you can install the new one correctly.
• Install the new fuel pump. Mount the new pump in the same way as the old one, ensuring it is secure and properly aligned.
• Reconnect the fuel lines to the new pump, being careful to prevent any leaks.
• Prime the new fuel pump using the provided priming lever or following the manufacturer's instructions. This step ensures that the pump is ready to deliver fuel to the engine.
• Check for any fuel leaks around the connections or the pump itself. Use appropriate thread sealants or Teflon tape to prevent leaks if necessary.
• Reattach any other components that were removed during the replacement process.
• Refill the fuel tank and start the engine to test the new fuel pump.

Note: It is important to follow safety precautions when working with fuel and engines. Ensure the area is well-ventilated, avoid open flames or sparks, and wear appropriate protective gear, including gloves and eye protection. Always refer to the engine's manual or seek professional assistance if you are unsure about any steps in the replacement process.

Frequently asked questions