An oil strainer for a full tank typically refers to a filter or screen in a fuel or oil tank that prevents contaminants from entering the system during operation or refilling. These are common in automotive, marine, or industrial equipment like generators or heavy machinery.
 
Purpose: Removes debris (e.g., dirt, metal particles) from oil or fuel in the tank before it reaches the engine or system, protecting components like pumps or injectors.
 
Types:
Fuel Tank Strainer: Often a mesh screen at the tank's outlet or filler neck (e.g., nylon or metal mesh). Examples include strainers for diesel fuel tanks or marine outboard motors.
Oil Tank Strainer: Found in hydraulic systems or engine oil reservoirs, typically a coarse mesh (40-100 microns) to catch larger particles.
 
Materials: Stainless steel, nylon, or brass for durability and corrosion resistance.
Maintenance: Strainers can clog when the tank is full due to increased flow or stirred-up sediment. Regular cleaning or replacement is key, especially if the tank has been sitting or contains old fuel/oil.
Issues: A clogged strainer can cause low oil/fuel pressure, engine stalling, or pump cavitation. Check if the strainer is removable for cleaning or requires replacement.
 
Specific Examples 
For vehicles like the Yamaha outboard or Kubota tractors, fuel tank strainers are often part of the fuel pickup assembly. A replacement might cost $10-$50.
Industrial oil tanks use basket strainers or inline Y-strainers, often rated for high flow (e.g., 10-100 GPM).