I was wondering how you guys with EFI boats manage to fog the engine; I have a fuel injected car that I don't drive for long periods of time and attempted to fog the engine. However, the ECM is somehow able to compensate for the incoming oil and it just keeps running, even with 2 cans of fogging oil. What's the trick?
WOW, I'm surprised they're no mechanics on this site.
Here's Mercury's Service Bulletin 2001-15 describing the procedure.
New Gasoline EFI/MPI Engine Fogging Procedure
Models:
All MerCruiser gasoline EFI and MPI engines.
NOTE: This change does not apply to carbureted engines produced in Stillwater or Hi-Performance
engines produced by Mercury Racing.
Change:
Follow this new fogging procedure when laying an engine up for storage.
Fogging Mixture:
In a 6 US gal (23 L) remote outboard fuel tank, mix:
5 US gal (19 L) regular unleaded 87 octane (90 RON) gasoline.
64 fl oz. (1.89 L) Mercury or Quicksilver Premium Plus 2-Cycle TC-W3 Outboard oil.
5 fl oz. (150 mL) Mercury or Quicksilver Fuel System Treatment and Stabilizer, OR
1 fl oz. (30 mL) Mercury or Quicksilver Fuel System Treatment and Stabilizer
Concentrate.
New Fogging Procedure
1. Disconnect and plug boat’s fuel line from Water Separating Fuel Filter inlet.
2. Connect remote outboard fuel tank (with the fogging mixture) to the inlet of the Water
Separating Fuel Filter.
IMPORTANT: If the boat is out of the water, follow instructions for running engine on
flush device as found in service manual for the engine being fogged.
3. a. Cool Fuel models: Start and run engine at 1300 rpm for 5 minutes.
b. VST models: Start and run engine at 1300 rpm for 10 minutes.
4. After specified running time is complete, slowly return throttle to idle rpm and shut engine
off.
IMPORTANT: Do not run engine’s fuel system dry of this fogging mixture in the 6 US
gal (23 L) remote outboard fuel tank.