Stihl 066 MS660 power up kit

A while back I asked a question in this thread:

http://www.arboristsite.com/showthread.php?t=59011

The question was about the part number for the muffler with the large outlet, the one used before OSHA strangled the saw. No one seemed to know what the part number was.

After looking in the IPL I decided to order the whole assembly that included the dual port cover. I thought there might be a chance that they would match. The gamble paid off.

Part number 1122 140 0603 includes the large outlet muffler, the dual port casing, both spark screens, and the screw for the front screen.

A pic of the large outlet muffler



It would be great if Stihl would sell an MS660 Power Up kit, like this one:



Pictured are the:

Large outlet, dual port casing muffler (1122 140 0603)
Limiter caps (4203 121 2700)
Limiter cap puller (5910 890 4500)

so how much did the complete muffler assy with the dual port cost ya?

The part was $82.45, $6.00 for the puller, and $.50 for each cap.

Tzed250 said:

The part was $82.45, $6.00 for the puller, and $.50 for each cap.

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wow that is spendy...I thought the DP cover was a little much and thought maybe the complete muffler would be a better deal...

For that much, I'll just make my small hole mufflers bigger....lol.

Love that limiter tool. Probably the best 6 bucks I ever spent.

Freakingstang said:

wow that is spendy...I thought the DP cover was a little much and thought maybe the complete muffler would be a better deal...

For that much, I'll just make my small hole mufflers bigger....lol.

Love that limiter tool. Probably the best 6 bucks I ever spent.

Click to expand...

Yeah, a little high, but I am a sucker for factory produced hop up parts.

Plus, I have had enough of a die grinder for a while after completing this:

http://www.arboristsite.com/showthread.php?t=61304

That muffler is $94 out here.


Did yours come with an internal box or not?

The box is in there Andy. It will probably see the business end of an endmill soon. Do you think that the stock high speed jet is large enough for that amount of flow?

I figured.. The original didn't have the box. I don't think it make much difference at all other the noise.

If you have a later model carb, it should be o.k. If you need to be more then say 1 1/2 turns out on the H, increase the H jet one size.

The saw was purchased new in Dec. 2007, so I guess it's a late model carb... Thanks for the info on the HS jet. I will post an update after adjustment.

good thread!

Great info.!!!

During installation the H limiter cap came off easily, the L cap was a son of a #*%@&!!!

Tzed250 said:

During installation the H limiter cap came off easily, the L cap was a son of a #*%@&!!!

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Did you turn it counterclockwise to start with? Never had a bit of trouble.

Freakingstang said:

Did you turn it counterclockwise to start with? Never had a bit of trouble.

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Yep turned it CCW, and the puller turns it CCW because it has left hand threads. It came most of the way out, then hung up. I dunno...

That DP cover is different fom the ones I stock.......

BostonBull said:

That DP cover is different fom the ones I stock.......

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Which part number?

BostonBull said:

That DP cover is different fom the ones I stock.......

Click to expand...

which one do you stock? That is the only 660/066 dual port I have seen

Tzed250 said:

Which part number?

Click to expand...

I dont have it off hand, ill get it monday. The one I carry has an indent in the front and the exhaust comes out across the face of the cover, not directly out with a bar blocking like the one in your picture. it looks like the one used on 440/460.

BostonBull said:

I dont have it off hand, ill get it monday. The one I carry has an indent in the front and the exhaust comes out across the face of the cover, not directly out with a bar blocking like the one in your picture. it looks like the one used on 440/460.

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cool, this is for the 066/660? I would like to see a pic and definately the part number. what is the retail on them?

It might be 1122 145 0801

Looks just like this one except it goes onto a 660.


http://www.arboristsite.com/showthread.php?t=60510

Just the cover not the casing