Fogging a motor

[CradGen2]

I recently purchased the 92 FlightCraft and it has a carbureted motor. I'm torn on weather I need to Fogging the motor or not.

I have only had PCMs and never have fogged them. Actually PCM doesn't recommend on the newer motor.

Any suggestions as we are putting the Flighty away for the winter this weekend. I guess my next questions would be: I plan on running the coolant thought the motor just before the transmission cooler, so how would you recommend I run the coolant and stall the motor at the same time.


I guessing the boat has never been fogged before and it runs like a champ, so I don't think I have any carb issues.

I'm taking all recommendations.

[WakeSlayer]

Re: Fogging a motor

how would you recommend I run the coolant and stall the motor at the same time.

Skip the fogging and use the key to stall it.
Make sure you stabilize the gas.

[CradGen2]

RE: Re: Fogging a motor

Wake - I'm not sure I understand, use the key to Stall it. What does that mean.

[WakeSlayer]

RE: Re: Fogging a motor

I just meant shut it off. Just being funny is all.
I have not fogged anything since 96 except a lawn tractor I am not using and storing indefnitely.

[CradGen2]

Re: RE: Re: Fogging a motor

I just meant shut it off. Just being funny is all.
I have not fogged anything since 96 except a lawn tractor I am not using and storing indefnitely.

You funny MAN very FUNNY Man. Thanks.

[Quinner]

RE: Re: RE: Re: Fogging a motor

On the EFI motors fogging should be done through the spark plug hole on each cylinder then rotate the motor a few cranks by hand when done, same sequence could also be done with a carbed motor, or you could fog directly down the carb. I have always done this as part of my winterizing, whether or not it's really necessary, who knows?

[DanielC]

Why fog motor for storage.

I fog my motor, through the spark plug holes. Here is why.
On a V-8 engine, four or five cylinders have open or partially open valves. This means air can move in and out of the cylinders as the temperature changes. The cylinder walls normally have a very thin layer of oil on them, from the engine being run, but if the engine sits for an extended period of time, the oil slowly runs off the cylinder walls.
I have seen engine parts in my garage with condensation on them. Here in Oregon, it really does not get that cold, but typically when it warms, up it is humid air that is warm. The large cast iron engine block warms up slower than the air, and water condenses out of the air, until the engine block gets as warm as the air. This condensation could be happening inside the cylinder, and if the engine has been sitting long enough for the oil to run off the cylinder walls, I could see the cylinder walls rusting a little.
My understanding is that fogging oil has wax in it, and after the solvents in the fogging oil evaporate, the wax solidifys on the cylinder walls, and stays there.

[bchesley]

RE: Why fog motor for storage.

I fog my gt-40 and do it just like daniel does it. I am pretty anal about it and always have been. The carb engine that I had in my last boat I would spray fogging oil in while running and then kill the engine via the key. Then I would put new plugs in the motor so it fired up with a clean set in the spring.

[WakeSlayer]

RE: Why fog motor for storage.

Brad, new plugs every year?

[goodfoot00]

RE: Why fog motor for storage.

I have fogged for 3 yrs through the intake of my 1995 GT40 with EFI. Is this bad? Why is through the plugs preferred? Also, how much antifreeze will the engine hold, is 1 gallon enough? I usually pour it through the thermostat intake.

[bchesley]

RE: Why fog motor for storage.

Yes new plugs every year. I just use the standard cheepo autolites so for $10 I get a fresh set. I know its not needed but I have them out fogging anyways.

[bchesley]

RE: Why fog motor for storage.

GoodfootOO you are spraying fogging oil on several sensors by doing it that way. If you want to do it while running on a gt-40 you can do it through a vacuum line.

[WakeSlayer]

RE: Why fog motor for storage.

Brad, makes sense if you have them out already.

[goodfoot00]

RE: Why fog motor for storage.

Bchesley, thanks! At 6'4" its hard to squeeze in the back of my V-Drive to get to the plugs. I'll look into the vacuum line next time.

[WakeSlayer]

RE: Why fog motor for storage.

goodfoot, Brad means just for the intake, not in lieu of the plugs. You would still need to do that.

Try squeezing in there with a big block...