Fogging EFI????

[Jason B]

I read somewhere that with EFI engibes you can't spray fogging oil into the intake, but I also read on WEST MARINE site they say to do it.

Anybody know which is correct? I'm confused. Should I just pull the plugs and toss oil straight in there?

Thanks!

[chpthril]

In my professional opinion, it is perfectly safe to fog an EFI engine. The only difference between the a carburated and EFI (TBI or MPI) engine is the method of fuel delivery. EFI engines still have a throttle body asm, in which the air enters, that you can spray/pour the fogging oil in in the same manner as a carb'd engine.


Fog away my friend

[Jason B]

So then I can just remove the "air filter" (not much filtering going on w/ that thing) and spray through there?

Appreciate the help! Thanks.

[chpthril]

So then I can just remove the "air filter" (not much filtering going on w/ that thing) and spray through there?

Appreciate the help! Thanks.

Yeah, not many dirt roads out on the lakes these days

Run the engine between 1200 -1500rpm. Spray enough to bog the engine down but not so much to stall it. When you've used about 1/2 a can, reach over and kill the engine

[samw]

I just finished fogging my 01 21V 350 mag MPI this past weekend. I used about 1/2 can of fogging oil through the throttle body. It worked very well.

Sam

[Jason B]

Thanks guys!! Saves me 400$ for a total winterizing.

[hoppas]

I must be anal, I do both. It's kind of complicated, but I generally suck RV antifreeze into the engine using the fake-a-lake. Once I'm sure the RV antifreeze is going in, I start fogging. After I shut the engine off I pull the plugs and shoot a couple squirts of oil in. It's probably overkill... ??

Jeremy

[raythompson]

Whoa!

Thanks guys!! Saves me 400$ for a total winterizing.

That is expensive winterizing. I just had mine done along with a fresh water impeller replacement for about $320.00. Last time I had the winterizing done it was only $170.00, a lot of that cost was the parts for the oil change, anti-freeze, and fogging oil.

Before anyone says do it yourself, yes that is the plan. I did so for 20 years on my other boat. However the Tige boat is still under warranty and having the dealer do it keeps warranty issues from being a problem. In the overall scope of things, counting what I spent for fuel and props this year, the expense of winterizing is not significant.

[Jason B]

That is a complete oil change in the trans/V/motor and all the rest including a new fuel filter. A little steep but not totally out of line for as much as they do.

I enjoy working on it though and with the help of everybody here I think I can handle it ok.

[TRD]

That is a complete oil change in the trans/V/motor and all the rest including a new fuel filter. A little steep but not totally out of line for as much as they do.

I enjoy working on it though and with the help of everybody here I think I can handle it ok.

I just did mine this year for $80. I used all Napa gold series filters and some good marine oil. That was most of the expense right there. I am planing on changing the impeller at the beginning of the year. I had an impeller to put in but found out the housing has marks inside it so I will replace that before next season starts. I fogged my EFI just as chptril said to do this and last year and haven't had a problem.

[kana12]

i live in texas and we are still out on the lake about every other week.. my boat will probrably sit less than 3 months.. do i realy need to winterize or can i use some good fuel stabilizer and be ok.

[dogbert]

I've been using fuel stabilizer because we go all winter long, just less frequently.

[kana12]

so do i realy need to winterize then.. or just go run the boat maybe once a month for the three months we are gonna sit out?

[dogbert]

You will need to drain the water out of it if it gets too cold or you will have expensive repairs. I never fog my engine, though.

[samw]

I would just go with some fuel stabilizer and run it every couple weeks. what is the humidity in Texas during the winter? If it is on humid side put a couple squirts of fogging oil. That's if your going to let sit longer then a month with out starting. Just my 2 There are others more educated then I.

Sam