Steps for Winterizing EFI Engine

Winterizing Your Fuel Injected Engine

WARNING ----  Fuel vapors can be present in the engine compartment. Avoid injury or damage caused by fuel vapors or explosion. Always check for leaking fuel or the smell of gasoline and ventilate the engine compartment prior to starting the engine or performing any work!

The fuel injection system is pressurized. Avoid serious injury from a fire or explosion. Allow engine to cool down and use care when removing water separating fuel filter. Also, hold a clean shop towel over the fuel filter when removing it to help avoid fuel spraying on the engine.

Make sure you have first followed the steps on the winterizing page regarding ethanol fuel

Prepare EFI fuel system for extended storage as follows:

  1.       Allow the engine to cool down.
  2.       Activate the Schrader valve to relieve fuel pressure.
  3.       In a 6 U.S. gal remote fuel tank mix:
  4.       5 U.S. gal regular unleaded 87 octane (90 RON) gasoline
  5.       2 U.S. qts Premium Plus 2-Cycle TC-W3 Outboard Oil
  6.       5 ounces Fuel System Treatment and Stabilizer or 1 ounce Fuel System Treatment and Stabilizer Concentrate.
  7.       Close the fuel shut-off valve, if equipped. Disconnect and plug the fuel inlet hose.
  8.       Connect the remote fuel tank (with the fogging mixture) to the fuel inlet fitting.
  9.       IMPORTANT: Supply cooling water to the engine.
  10.       Start and operate the engine at 12-1300 rpm for 5 minutes.
  11.       After specified operating time is complete, slowly return throttle to idle rpm and shut engine off.
  12. IMPORTANT: Ensure that some fogging mixture remains in the engine. Do NOT allow the engine's fuel system to become completely dry.
  13.       Remove and discard the water separating fuel filter.
  14.       Install a new filter.

 Continue with the rest of the steps on the winterizing page