IAC Filter

aero3113

Does anyone know the part number for this IAC filter? I saw online that some engines have the filter in the throttle body, when did Mercruiser change the location?

Liberty44140

Hey aero, have you tried marine engine.com? Go to that site and click mercruiser and then enter in your engine serial number, will give you diagrams to find your exact mart numbers to re order. Those filters don’t look so glorious

aero3113

Looks like 35-8M2001030, thanks @Liberty44140 .

Liberty44140

Great!

reneechris14

looks right

Spyderweb

That's the correct part.  I replaced mine when I got the boat 2 seasons ago.  I think it was the original.

aero3113

WoW!

rasbury

Don't think that is on my 350?

aero3113

@rasbury , when you get a chance pull off your flame arrestor and see if there’s a filter in the side of the throttle body. They changed the location after a certain year I think.

aero3113

Watch this video, it shows the other location.

https://youtu.be/RLbOE1mkXVw

J3ff

My IAC went bad on the last day of warranty. Couldn't believe it, but had it fixed for free. 

Cableguy Greg

rasbury said:

Don't think that is on my 350?

It is there!! You just have to look for it. 

aero3113

If it’s not, you’ll have a loud sound of air/whistle.

Willhound

On my 2000 270 with 5.7 EFI it's under the spark arrestor.

Ian

I'll have to search my 2003 5.0 MPI's when I see her in spring. The forum continues to educate me.

Liberty44140

yep on my 2006 350 MPI's it's right under the flame arrestor. I was pulling it annually to clean it and never noticed the IAC muffler and as Ian said this educational forum showed me where it was. Pretty nasty when I found them, replaced with new. It is good to keep the arrestors clean anyway

Stodge

Liberty44140 said:

yep on my 2006 350 MPI's it's right under the flame arrestor. I was pulling it annually to clean it and never noticed the IAC muffler and as Ian said this educational forum showed me where it was. Pretty nasty when I found them, replaced with new. It is good to keep the arrestors clean anyway

You can't pass a vessel safety check if they aren't clean.  I believe it's a ticket-able offence if the CG finds that when you are boarded.

Liberty44140

Stodge said:

Liberty44140 said:

yep on my 2006 350 MPI's it's right under the flame arrestor. I was pulling it annually to clean it and never noticed the IAC muffler and as Ian said this educational forum showed me where it was. Pretty nasty when I found them, replaced with new. It is good to keep the arrestors clean anyway

You can't pass a vessel safety check if they aren't clean.  I believe it's a ticket-able offence if the CG finds that when you are boarded.

Absolutely, thats why I started cleaning annually. First safety check with this boat I passed, but just a little dirt on the fingers, learned then to keep em clean! Even did the genny every few years but of course USCG doesnt check that.

rasbury

Wow- i will definitely pull the arrestor and get one ordered...and clean the arrestor at the same time. The y tube describes how my motor is running, assumed just from sitting but have run it a bit so good call there @aero3113 thanks.

aero3113

I replaced both of mine today.

 

rasbury

Somehow I wish we could put together a comprehensive list of dyi stuff most of us can do eliminating the minor stuff from the equation. A checklist we can do each season. I try to mentally do stuff but I know I have best intentions but...

Ian

I keep a list in my Office “notes” that is on PC, iPad and iPhone. Each item as a hyphen put in front when done, end of year they all get removed. VVM users can make lists on it too that I haven’t looked at yet.

Liberty44140

Yea I keep an excel sheet with what gets done each year, General annual maintenance on one tab by year and then a tab for each year with the project list and budget. Almost done closing on selling my 342 and it’s been a great tool for the buyer to know what has been done and what he needs to do each fall and spring. 

69fastback

Hmmmmmm I replaced my IAC this year and didn’t see a filter. I’ll have to go back and look now. 

rasbury

So not as to reinvent the wheel, is there perhaps a way to post one of your excell sheets as a "master" for others to use?

Liberty44140

I am certainly open to that @rasbury at the very least if you want to PM me your email I'd be happy to email it to you

Liberty44140

Here it is on my Merc 350's. IAC muffler (small white piece of foam) is #6. Goes down in to an insert just under the flame arrestor. 

Spyderweb

On my 2008 350 MAG the IAC (silver part) can be seen on port side of engine underneath the flame arrestor cover.  The IAC filter is just behind the black part attached to it on the left side (just to the right of the IAC label).

2nd photo is end view (from front of engine) looking at filter, similar view to @aero3113's well focused picture at top of this thread.

rasbury

I went ahead and ordered one....6 bucks plus 9 bucks shipping! What do I clean the arrester with...some dawn dish soap or some other degreaser??

TonyG13

rasbury said:

I went ahead and ordered one....6 bucks plus 9 bucks shipping! What do I clean the arrester with...some dawn dish soap or some other degreaser??

Dawn works. I personally use Simple Green. Self-explanatory, but never use a combustible cleaner. 

Liberty44140

Yea I cleaned mine with warm water and joy or Ajax liquid dish soap, used an old tooth brush to lightly scrub, then let dry a few days. Blow the arrestor out with the compressor first