8.1 Owners -Protect your IAC valves!

[rondds]

To the left is a IAC Muffler in service for 30 hours. To the right is the replacement. It's a $1 part. Yet another thing to do annually (at least).

 

[mistercomputerman]

There is no such thing as a $1.00 boat part...

 

[rondds]

OK, not EXACTLY $1. But costs less than a candy bar.

Item #6 HERE

 

[rondds]

...and while you're in there, buy a can of brake cleaner and blast your flame arrestors clean.

 

[Do Over]

That may be the most ridiculous looking "part" I've ever seen but obviously necessary.

 

[mistercomputerman]

I should have called you before I ordered my replacements. You could have saved me a dollar and change.

 

[ziekman@cox.net]

To the left is a IAC Muffler in service for 30 hours. To the right is the replacement. It's a $1 part. Yet another thing to do annually (at least).

Thats with 30 hours of use? I've got 320 hours on mine, they must have been obliterated, compared to the ones with 30. How could I have missed that simple replacement item. Yes, about $1!!!!

 

[Do Over]

so they add $10 on if you don't order $50 or more PLUS they charge you $12 for shipping??

no thanks.....I'll get a sheet of that material from my True Value for $3 and have enough for years :grin:

 

[rondds]

I would have never known about this little maintenance item without mistercomputerman warning me of the necessity. I would guess most people aren't aware that thing even exists.

I ordered them as part of a big order (boats.net) last year so the shipping was sort of inconsequential.

I wondered about making them myself but not sure if there's some particle size it's supposed to filter or if there's a certain amount of air that it's supposed to allow to pass so that the IAC valve doesn't fry.

 

[WDCboater]

Thanks for the info. I'll add this to the maintenance checklist.

 

[mistercomputerman]

so they add $10 on if you don't order $50 or more PLUS they charge you $12 for shipping??

no thanks.....I'll get a sheet of that material from my True Value for $3 and have enough for years :grin:

Get them from the Merc dealer. List price is $1.60 each. Wait for their next stock order and pay no freight.

 

[Fun Times]

...and while you're in there, buy a can of brake cleaner and blast your flame arrestors clean.

It's also a good idea to buy some throttle body cleaner and clean up the inside throttle body, IAC hole and throttle body plates. I've had many boat owners say wow what did you do to my boat? The throttle response is so much more responsive now. Should be doing your vehicles throttle body and MAF sensor (if it has one) as well.:wink::smt001

 

[ziekman@cox.net]

To the left is a IAC Muffler in service for 30 hours. To the right is the replacement. It's a $1 part. Yet another thing to do annually (at least).

I checked the Merc parts list, looks like this is only pertinent to boats with Mechanical Throttle shift. The Digital Throttle Control version doesn't show it.

 

[Bucit]

On another note, if your IAC fails while your away from the docks and do not have a spare there's an easy fix. Remove the hose on the back side of the IAC. Your boat will start right up and idle as normal (except it will idle 100 rpms higher than with the IAC).

 

[rondds]

BoatTech and Bucit...good advice!

 

[tomk]

Were does that IAC muffler live on the motor I have not seen it? on mine yet

 

[ziekman@cox.net]

See post 4, Tom.

 

[rondds]

Pull off the flame arrestor. Look inside the hole, just inside the rim, in around the 12 o'clock position. You'll see the crumpled up little foam thingy stuffed in there. Use a needlenose to extract it and replace with a new one.

Possibly a stupid question...
What do you do with the throttle body spray? Just spray it inside the opening once the flame arrestor is removed?

 

[my DOG HOUSE]

FYI. They are Mufflers, not filters. You can just remove them if the air noise is not a factor with the engine room hatch closed.

 

[rondds]

Considering all the "soot" (or whatever it is) that accumulates on the flame arrestors and on the mufflers, I'd have to think it's not a good idea to allow that stuff to pass through to the IAC valve. Heck for a buck, I'll change them every year.