Indmar 556003 – Quick Tech Specs

• Type: Inline EFI fuel filter (OEM Indmar part).

• Media: Stainless wire mesh element.

• Size: ~4.2" long, cylindrical inline style.

• Connections: Uses O-ring sealed fittings-pn 986032(not included)

• Applications: Used on Indmar EFI engines (Chevy-based and some Ford), common in Malibu & Axis boats from the mid-1996s through the 2015s.

• Location: Mounted in the metal fuel line after the in-tank fuel pump hose.

DIY Replacement Guide

1. Relieve fuel pressure

   • Disconnect battery.

   • Cycle key ON → OFF to bleed pressure if the system has a Schrader valve (check your model).

   • Have a rag ready to catch fuel drips.

2. Locate the filter

   • Follow the fuel line from the tank/pump toward the engine.

   • The inline filter is usually a small metal canister mounted on the frame rail or near the pump.

3. Remove filter

   • Loosen clamps or fittings.

   • Carefully pull the filter free, watching for residual fuel.

4. Install a new filter

   • Lightly oil the new O-rings with clean engine oil or fuel-safe grease.

   • Slide the filter into the fittings and tighten the clamps/fittings securely.

   • Ensure flow direction (if marked) matches fuel flow (tank → engine).

5. Test

   • Reconnect the battery.

   • Turn the key ON (don’t start) to prime the fuel system.

   • Check for leaks.

   • Start the engine on water and let it run a few minutes, inspecting connections.

 Service Interval

• Replace every 100 hours or annually, whichever comes first (more often if fuel quality is poor or ethanol-blended gas is used).