Ms661 with maxflow air filter

[SirSawsAlot]

Recently i purchased and installed the maxflow air filter kit for my 661

The saw runs great definitely an upgrade in performance.

I did however notice that my piston is starting to show premature signs of scoring and there is a little more carbon buildup around the exhaust. I went from a 50:1 mix down to a 40:1. I use either 93 premium gas or 90 octane rec fuel at.

The 661c has an automatic carburetor adjustment (m-tronic) so i am limited about chaging air to fuel ratio.

Wondering if anybody else has experience with the maxflow filter

 

[blsnelling]

Pics of scoring please.

 

[gunnusmc03]

What coil does your saw have?

 

[SirSawsAlot]

Pics of scoring please.

Here are the pics, let me know what you think

 

[SirSawsAlot]

What coil does your saw have?

Not sure, the saw looks to be 2013 model.

 

[SirSawsAlot]

Pics of scoring please.

Here is what i did, used the 60 pour green filter, oiled it with Bel Ray foam filter oil. cut the stock HD2 filter to fit, cut out the stock cover to allow more airflow. As you can see the filter is doing its job. My concern is that the mtronic carburetor adjustment is not doing its job, causing the scoring. I did notice a little healthier sound using a 40:1 mix vs. 50:1 mix

 

[SirSawsAlot]

Pics of scoring please.

I also modified the exhaust to allow more airflow

 

[blsnelling]

Here are the pics, let me know what you think

I don't see any scoring.

 

[SirSawsAlot]

I don't see any scoring.

Sweet. I guess im just being a worry wart. Did i do everything else right in terms of the modifications ?

 

[blsnelling]

Looks fine to me.

You might want to pull the recoil and get the PN off the coil. Yours is old enough that I highly doubt it has the new coil. Rumors have it that the new one tunes richer, but I don't know that to be true.

 

[SirSawsAlot]

Looks fine to me.

You might want to pull the recoil and get the PN off the coil. Yours is old enough that I highly doubt it has the new coil. Rumors have it that the new one tunes richer, but I don't know that to be true.

Okay, how would i go about getting that part number, the guys at the nearest saw shop are untrustworthy around here. Basically on my own with this stuff

 

[blsnelling]

I don't have it off hand. A search here should turn it up.

 

[Ikeholt]

Barbie stickers might be adding to the performance as well. I like it.

 

[SirSawsAlot]

Barbie stickers might be adding to the performance as well. I like it.

Cinderella, you should see belle from beauty and the beast

 

[LoveStihlQuality]

Looks fine to me.

You might want to pull the recoil and get the PN off the coil. Yours is old enough that I highly doubt it has the new coil. Rumors have it that the new one tunes richer, but I don't know that to be true.

Does anyone have a part number?

LoveStihlQuality

 

[LoveStihlQuality]

Cinderella, you should see belle from beauty and the beast

Off subject (imagine that ) anyone with kids, Disney Breakfast with the Princesses, WOW! Princess Jasmine! WOW

LoveStihlQuality

 

[gunnusmc03]

Stihl is exchanging 661 coils for free of charge if they are the old models.

 

[LoveStihlQuality]

Stihl is exchanging 661 coils for free of charge if they are the old models.

Do you know what manufacture date corresponds to coil change?

LoveStihlQuality

 

[gunnusmc03]

There isn't DOM, if you have a 4700c or 4700D coil they'll exchange it for 4701a free of charge.

 

[Laslabjohn]

How do you go about getting this done