Suzuki Outboard Fuel and Oil System Components

Suzuki Outboard Fuel & Oil System Parts - Resources & Information

Clean oil and fuel are essential in reducing friction and preventing damage to internal components, providing many years of engine life. Choose from PartsVu’s wide selection of Suzuki Outboard Fuel and Oil System Components, including Suzuki filters, Suzuki o-rings, Suzuki oil filters, hoses, Suzuki case assembly, and more to keep your Suzuki outboard motor’s fuel and oil system clean and operating efficiently. 

PartsVu.com offers a wide selection of certified OEM Suzuki Outboard Fuel and Oil System Components to match the exact specifications of your Suzuki outboard motor. 

In addition to Suzuki outboard parts, PartsVu is also proud to help boaters by providing helpful resources for Suzuki outboard motors:

• Suzuki Outboard Engine Oil Capacities & Oil Filter Chart
• Suzuki Outboard Engine Gear Lube Capacity Chart
• Suzuki Outboard 100-Hour Service Checklist
• Suzuki Outboard Season Breakout Guide

Suzuki Outboard Fuel and Oil System Components FAQ

How do I perform a Suzuki fuel pump test? 

How do you test a Suzuki fuel pump on an Suzuki outboard motor? Fortunately, there are simple ways to test your fuel pump. This process assumes that you have already checked the rest of the Suzuki fuel system for cracks, leaks, and general signs of wear to ensure continuity between the Suzuki fuel tank and pump. You can check this by pumping the primer bulb until it feels hard. Fuel should travel easily from the tank all the way to the pump. Your outboard fuel filter, located just before the fuel pump, should be full. 

1. With the engine off and the cowl cover removed, remove the spark plug wire boot and remove the plug
2. Attach the compression gauge to the spark plug hole. Then, twist the throttle position wide open and either pull the rope start or turn the starter over several times.
3. The proper PSI will vary based on the engine, but in general a low PSI (under 30) means that there is a compression issue that is preventing the fuel pump from working. If you have adequate pressure, this is indicative of a bad fuel pump.

The two parts of the fuel pump that are most commonly the source of problems are the diaphragm and the one-way valves. To test them, it will be easiest to remove the pump from the engine.

Why is my Suzuki outboard fuel system important?

The Suzuki fuel system is composed of the fuel pump, fuel filter, check valves, fuel hoses, fuel pump diaphragm, and injectors. Listen for the operation sound. If you can’t hear the system attempting to work, check for continuity between the fuse holder, fuse, fuel pump relay, and wiring harness. Repair or replace the defective part(s) if there is no continuity. If there is continuity, replace the electric fuel pump. If you hear the operation sound, check each part of the fuel system individually. 

First, inspect the Suzuki fuel filters and look for clogs, cracks, kinks, or leaks in the hoses. Replace any parts with damage. Next, check the diaphragm for cracks or other signs of damage. Then, check the vapor separator needle valve for bends or signs of wear. The next step is to check the injectors for clogs and resistance. Then, check for poor connections.

Finally, note if there is any water in the fuel. Ethanol gasoline attracts water, which negatively impacts the combustibility of the fuel. This is especially likely if you haven’t used fuel additives or stabilizers. Water in the fuel may also cause a bad or failing fuel pump. If you find water in your fuel, you may want to check that the pump is in good condition. 

You can perform a Suzuki outboard fuel pump test by removing the spark plug wire boot from the Suzuki spark plug and then removing the spark plug with a plug socket and wrench. Attach a compression gauge into the spark plug socket. If you have an electric motor, you may need a second person to crank your engine over while you twist your throttle position open. Otherwise, you can push the throttle open with one hand and pull the rope start.

How do I service my Suzuki 4-stroke outboard fuel system? 

Depending on your application and style of boat, your Suzuki fuel system may include a fuel-water separating filter. If you have not seen one, follow the routing of your fuel hose from the engine rigging tube backward through the boat. These vary in shape and manufacturer, so be sure to order the identical replacement size for the best fit. Verado owners may not have an inline filter as the engine has a water separator under the cowling.

Use a filter wrench to loosen the existing filter element and use caution when removing it as it will be filled with gasoline. A clear plastic or glass container is helpful to dump the filter and examine the contents. A small amount of debris is common, as is a small amount of water after the fuel has had a moment to settle. More significant amounts of water would warrant further investigation.

If your filter’s mounting location allows it, pre-fill the replacement filter with some gasoline to make re-priming the fuel system easier. It is also advisable to use a small amount of grease or engine oil to lubricate the o-ring before installation. Spin on and hand tighten only about a half turn to snug.

Move back to the engine and locate the filter element(s) on the engine. The scope of this service will only include the low-pressure fuel filter and fuel water separator if applicable by model. Suzuki recommends that owners do not service their high-pressure fuel filters. Depending on your engine model, the water separator filter (or castle filter) may be removed by using a wrench, standard tools, and a little caution. Unplug the water-in-fuel sensor if applicable and spin the cap off of the housing. Replace the filter element with a fresh one, lube the o-ring with grease or oil, and carefully reinstall the cap.

For most other models, the low-pressure fuel filter is inline where the fuel supply line passes down the side of the cowling. On applicable models, locate the Schrader valve on the fuel system. Cover the valve with a rag or towel and depress the valve stem to vent the pressure from the system before service. With the pressure vented, remove the inline filter and replace it with a new one paying particular attention to locate the clamps or zip ties securing the hoses to the filter.

Locate your engine’s primer bulb if applicable and use the primer to pump up the fuel system. You should feel and hear gasoline entering and filling the filter cup. Check for leaks and prime until the bulb becomes firm.

If you are not already regularly running Suzuki ECSTAR Fuel Injector Cleaner (for fuel injected engines) or Suzuki ECSTAR Fuel Conditioner & Water Remover through your Suzuki fuel system, the 100-hour service interval is an excellent time for a “shock treatment.” 

Suzuki ECSTAR Fuel Injector Cleaner is a fuel system cleaner and top-lube that will help to clean deposits from the tank, lines, carburetors, injectors, and pumps. It breaks up fuel system varnish and will help to prevent gumming.

Suzuki ECSTAR Fuel Conditioner & Water Remover is a fuel system conditioner that also helps to remove carbon deposits. It prevents phase separation that draws water into the engine, while also removing any moisture in the fuel system to prevent corrosion. 

How do I perform a 100-hour service on my Suzuki outboard engine?

To ensure proper engine function, it’s always best to service your Suzuki outboard engine every 100 hours after the initial break-in period (first 10 hours) and after the first maintenance interval (at 20 hours). 

The following is a Suzuki outboard 100-hour service checklist to help you service your engine properly:

If you want a more in-depth explanation of how to perform a 100-hour service on a Suzuki outboard engine, read our blog “Suzuki Outboard 100-Hour Service Checklist”. Also, be sure to refer to your Suzuki Outboard Service Manual for which parts you’ll need, how to perform basic repairs, and other engine specific tasks

To make engine maintenance even easier, PartsVu has a wide selection of Suzuki outboard engine 100-hour service kits available. They’re pre-assembled with everything you need to keep your boat happy and healthy every 100 hours.