What are the symptoms of a bad fuel pump on an outboard motor?

The symptoms of a bad fuel pump on a boat are engine sputtering at high speeds, poor acceleration under heavy loads, increased fuel consumption, increased engine temperatures, and the engine sounds rough (whine). If you see one of those symptoms, your fuel pump might be causing those problems.

What are the signs of a weak fuel pump?

Usually, a bad or failing fuel pump will produce one or more of the following 8 symptoms that alert the driver of a potential issue.

• Whining Noise From the Fuel Tank.
• Difficulty Starting.
• Engine Sputtering.
• Stalling at High Temperatures.
• Loss of Power Under Stress.
• Car Surging.
• Low Gas Mileage.
• Car Will Not Start.

How do I know if my Mercury fuel pump is bad?

What are the symptoms of a bad fuel pump on an outboard motor?

1. Silence. When you try to start your engine, you should be able to hear the sound of the fuel pump engaging.
2. Slowing, Stopping, or Sputtering.
3. Gas Guzzling.
4. Heat.
5. One-Way Valves.
6. Diaphragm.
7. Fuel Stabilizers.

How can you tell a bad fuel pump?

Symptoms of a Bad Fuel Pump

1. Car Won’t Start. There are a host of issues that could prevent a car from starting, but a lack of fuel is one of the first things to check.
2. Sputtering.
3. Car Dies Under Heavy Load.
4. Inconsistent and Unintended Acceleration.
5. Decreased Fuel Efficiency.
6. Increased Engine Temperature.

What causes a boat engine to stall at idle?

Designed to regulate the engine idle speed, a malfunctioning idle air control valve can cause the engine to stall. The inside of the fuel hose is susceptible to deterioration. If left unchecked, it can cause stalling and in extreme cases engine failure.

How do I check my hours on my Mercury Optimax?

Call any shop and ask if they have the scanner to scan a Optimax. Ask what they would charge for a printout of the hours. The cost can either be shared and the seller keeps the printout if you don’t buy or you can pay for it.

What kind of gas does a Mercury Optimax take?

The motors are made to run 87 and ethanol.