EY20 Generator Fuel Tank

For equipment rental companies, disaster relief agencies, and construction contractors maintaining fleets of Robin-powered generators, stocking the EY20 fuel tank as a spare part ensures rapid turnaround when a generator is returned with tank damage. The complete-kit format - tank, cap, strainer, and petcock - means the mechanic replaces all fuel system consumables in one job, eliminating the risk of reusing a clogged strainer or a petcock with a hardened internal seal that will leak within weeks. The tan color match maintains fleet appearance and resale value.

Generators spend most of their life in storage - often 10–11 months of inactivity followed by a few days of emergency use. During storage, ethanol-blended fuel left in the tank absorbs atmospheric moisture through the cap breather, causing phase separation where water-ethanol mix sinks to the tank bottom and corrodes the steel. The phosphate-coated interior of this tank resists this corrosion. For owners who drain the tank before storage, the steel construction prevents the residual fuel film from permeating through the tank wall and leaving varnish deposits that clog the carburetor on the next start-up attempt.

The primary application. The EY15 and EY20 engines power a wide range of compact portable generators under the Robin-Subaru brand, as well as generators from manufacturers who sourced Robin engines for their OEM equipment. These generators are commonly used for residential backup power, camping and RV power supply, outdoor event power, and light construction tool power. The fuel tank is the most exposed component - it sits on top of the generator, unprotected, and takes the brunt of outdoor weather, refueling spills, and transport handling.