Chainsaw Repair

Husqvarna - Stihl - Poulan - Jonsered - Dolmar chainsaws and more => Stihl => Topic started by: Cut4fun . on March 02, 2018, 10:43:52 am

Title: Stihl 066 660 MS660
Post by: Cut4fun . on March 02, 2018, 10:43:52 am
Looks like after selling a 5 saws off last few days and few more are coming in to go through to replace them. One is this 066 and a husky 350 351.

Cant find my old thread right now so will merge later.

Noticed a few busted fins on cylinder. But know big deal to me.

Said pulls 150psi.  But has erratic idle and starts revving high when cutting. Sounds like crank seals to me.





Title: Re: Stihl 066 660 MS660
Post by: Cut4fun . on March 04, 2018, 10:34:43 am
Looks like the ole wide nose bar folks want.

Title: Re: Stihl 066 660 MS660
Post by: Cut4fun . on March 04, 2018, 10:39:10 am
Just thought of something, maybe a torn boot too.
Title: Re: Stihl 066 660 MS660
Post by: Cut4fun . on March 04, 2018, 05:06:18 pm
Just trying to remember the 066 stuff again.

91.6cc    54mm bore x 40mm stroke
Title: Re: Stihl 066 660 MS660
Post by: mdavlee . on March 04, 2018, 07:53:19 pm
Torn boot usually means worn out mounts or they really pulled on it hard once
Title: Re: Stihl 066 660 MS660
Post by: Cut4fun . on March 05, 2018, 07:16:42 am
Picked up at 6pm last night when kid headed back to college.  Got home about 7pm

Worked on it till about 8pm last night looking things over.  Carb looks new.  Air filter old style wire and cloth type I never liked. Going to get a Newer HD or HD2.

Replaced Impulse line. I suspect that right now.

Cylinder bolts all 4 were loose.

Motor mount AV was torn. Happen to have a new oem leftover from years past owning these.

Noticed chain was turning toward the end while pulling over. So have all the innards pulled right now.  Oiler worm gear, clutch, etc. Cleaning back up then see. 

Hope to figure out if it was impulse later today.

Also noticed they were running 404 8T 24"   Got 3 hardly used chains with it. 
Title: Re: Stihl 066 660 MS660
Post by: Cut4fun . on March 05, 2018, 07:50:07 am
pics

couple dang stragglers too.



Title: Re: Stihl 066 660 MS660
Post by: Cut4fun . on March 05, 2018, 12:25:22 pm
Happy Dance =  just needs little things now, AF, and few fasteners.

 Test cut with 24" 404 8T buried in dry ash log.


Title: Re: Stihl 066 660 MS660
Post by: Cut4fun . on March 05, 2018, 06:19:03 pm
 Might be sold to guy I told about while he was buying the 272. Didnt even have in my hands yet.
Was offered a 395xp on trade too.
Title: Re: Stihl 066 660 MS660
Post by: Cut4fun . on March 12, 2018, 08:09:32 am
Opened the rear cage wide open and put a 404 7 on it for todays test and tune session for new owner. The hyway DP muffler set looks pretty nice.  Even came with both spark screens, even though the side one is on the outside instead of inside like oem.   

Title: Re: Stihl 066 660 MS660
Post by: Cut4fun . on March 14, 2018, 09:40:29 am
If a guy wants to put a 3/4 wrap or full wrap on a 066.   Is this the saws I remember had to use a matching brake handle for the 3/4 full wrap handles with?
Title: Re: Stihl 066 660 MS660
Post by: Cut4fun . on March 14, 2018, 10:25:59 am
If a guy wants to put a 3/4 wrap or full wrap on a 066.   Is this the saws I remember had to use a matching brake handle for the 3/4 full wrap handles with?

Saving info from CR-G

The models with that saw are something I haven't dealt with. 066, BR, M, W and MR. One specific brake lever goes on the MR model, 1122 790 9102 and all others use the 1122 790 9101

pic of handles

1122 790 3603 which requires elbow connector 1122 791 5500

1122 790 3608 and spacer 1122 791 4500



Title: Re: Stihl 066 660 MS660
Post by: Cut4fun . on March 15, 2018, 08:10:09 am
Dave's cheat sheet at CCC

Please see below for a question about the 1122-792-9106 full wrap brake handle


1122-790-1702 standard ½ wrap handlebar 064/066

1122-790-1750 standard ½ wrap handlebar 064/066/MS640/MS650/MS660

1122-790-1712 arctic heated ½ wrap handlebar 064/066 up to X 33917065 (feb 1996)

1122-790-1752 arctic heated ½ wrap handlebar 064/066

1122-790-1713 arctic heated ½ wrap handlebar 064

1122-790-1751 arctic heated ½ wrap handlebar 066

1122-790-9100 standard brake handle 064

1122-790-9103 standard brake handle 064/MS640

1122-790-9101 standard brake handle 066/MS650/MS660

1122-792-9105 wrap style brake handle 064

***1122-792-9106 wrap style brake handle 066 (1994 IPL 134ET009)

1122-790-9102 wrap style brake handle 066/MS650/MS660

1122-790-3603 ¾ wrap handlebar 064/066

1122-790-3604 arctic heated ¾ wrap handlebar 064/066 up to X 33917065 (feb 1996)

1122-790-3607 arctic heated ¾ wrap handlebar 066

1122-790-3610 arctic heated ¾ wrap handlebar 066/MS660

1122-790-3651 arctic heated ¾ wrap handlebar 066/MS660

1122-790-3611 ¾ wrap handlebar 066/MS650/MS660

1122-790-3608 full wrap handlebar 066

1122-790-3609 arctic full wrap handlebar 066

1122-007-1003 full wrap handlebar 066/MS650/MS660

1122-007-1022 arctic heated full wrap handlebar 066/MS660

*** the 1994 Stihl 064/066 Spare Parts List shows this as being for the 066 and I have an original 066 red light with this brake handle but Jason has a brake handle labelled 9106 that is a wrap brake handle for the 064. If anyone can shed some light on this anomaly that would be great.

He sent me a picture of a standard 064 9100 handle with this 9106 and they are very similar in width.
Title: Re: Stihl 066 660 MS660
Post by: Cut4fun . on March 15, 2018, 08:26:34 am
Might be able to pull that rubber back up to top.

Per Dave

That is the long horn three quarter wrap it requires hand guard 1122 790 9102



Title: Re: Stihl 066 660 MS660
Post by: Cut4fun on May 08, 2018, 08:14:44 am
Just took this stihl 066 660 in trade and was wondering which it was.

Had the serial number ran and turns out. 162201967   Purchased may 3rd 2005, ms660

Now to try and decide to build or part out or sell whole.   Quick look missing oil pump, clutch and all stuff with that, clutch cover, recoil, top cover, air filter cover, carb, air filter base and air filter. Off hand from poor memory.
lol just looked at pic, muffler.

Title: Re: Stihl 066 660 MS660
Post by: Cut4fun . on May 08, 2018, 04:45:46 pm
Sold it for $150  guess that settles that decision.
Title: Re: Stihl 066 660 MS660
Post by: Cut4fun . on June 01, 2018, 09:37:11 am
I knew there couldnt be much wrong with that 660 I took on trade and sold for $150.  Guy just sent me video of it running. Put carb, fuel and impulse lines on it. Started 3rd pull he said.

Title: Re: Stihl 066 660 MS660
Post by: mdavlee . on June 01, 2018, 08:46:28 pm
Easy enough fix for him
Title: Re: Stihl 066 660 MS660
Post by: Cut4fun . on February 24, 2019, 01:54:19 pm
Never see a 066 around here with the wide west cost clutch cover. stihl 028 too.

Title: Re: Stihl 066 660 MS660
Post by: Cut4fun on February 27, 2019, 02:10:23 pm
Working on this 066 660 that appears to have a aftermarket cylinder on it.
I never had this problem with any of my 066 660 saws. My question for folks that know.
He said hard to start had to squirt mix to fire off. Well IMO the problem is the choke not staying shut when pushed down. When you take you thumb off it lets the choke open back up. Showing let off and holding lever down. So whats the fix? New accessory black plastic deal on the bottom?

Title: Re: Stihl 066 660 MS660
Post by: HolmenTree on February 27, 2019, 02:57:26 pm
I'm thinking the owner wasn't holding down the throttle safety interlock down before pushing down on the master control switch and bent the switch button metal rod.
Pull the rear handle black cover off and make sure the fast idle and safety interlock is working smoothly,  might need a good cleaning too.

My 1992 066 Mag Arctic with standard half wrap handle came from the factory with a wide west coast cover.
Title: Re: Stihl 066 660 MS660
Post by: Cut4fun on February 27, 2019, 04:32:40 pm
 I pulled it down. Just alot alot of slop in the whole system. I messed with the on/off spring some and then had a bright idea to take up the slop where the plastic meets the choke lever. Now it will close up when everything is off. It wouldnt before. Now I see this cobbled up 066 660 has a metal rear base with a intelli carb. Also where the choke comes up and meets the metal base it was hitting too. So with metal base on I can watch it open choke as I tighten the nuts to carb.

 Will close all the way now. with metal base off


 But this metal base when put back on you can watch it open choke up where it hits inside. Intelli carb with this base. hmmmm



Title: Re: Stihl 066 660 MS660
Post by: HolmenTree on February 27, 2019, 04:41:51 pm
Yep part of the problem is you got a non intelli carb HD filter base from a 1980's 064.
The thin baffle plate that goes under the 2 carb nuts is missing too.
Title: Re: Stihl 066 660 MS660
Post by: Cut4fun on February 27, 2019, 04:49:33 pm
Thats the help I am needing.

what air filter base this saw should have with this carb set up? I looked at the IPL and ones for sale and it starts to get confusing.

Talk to me Willard. You know this saws way better then I ever will.

So glad my 4 wasnt cobbled like  this one.
Title: Re: Stihl 066 660 MS660
Post by: Cut4fun on February 27, 2019, 04:51:44 pm
Yep part of the problem is you got a non intelli carb HD filter base from a 1980's 064.
The thin baffle plate that goes under the 2 carb nuts is missing too.

I just put the carb nuts on carb to start it without the base.  They were on outside of base.
Title: Re: Stihl 066 660 MS660
Post by: HolmenTree on February 27, 2019, 06:24:02 pm
I converted both my 066's to non intelli carb, one 1992 other decomp 1997. I had lots of older 064 parts and HD non intelli filter setup like yours.
You'll need to put a older 064 WJ carb top cover on that Intelli WJ.
Or else cut a slot in the base to make it line up.
Here's my 066 conversions , I like the non intelli, used it lots in the 1980's and worked good for me. I thought the intelli was kind of goofy when it came out.

Title: Re: Stihl 066 660 MS660
Post by: Cut4fun on February 27, 2019, 07:18:34 pm
I came up with a idea and ran it by owner. When you said something about shim between carb. I tried something and it worked to give just that hair of space needed to let choke close right with base on now.
Still need to come up with permanent redneck fix now.

Owner said it was a meteor topend on it.  Checked my new psi small engine gauge out with my old one. Pulls great psi and same on both which is good to know.



Title: Re: Stihl 066 660 MS660
Post by: Cut4fun . on February 08, 2020, 10:46:41 am
Me likey when the nice ones come in. 660 and wide nose bar to boot.

Title: Re: Stihl 066 660 MS660
Post by: Cut4fun . on February 08, 2020, 03:39:04 pm
 This 660 still has the original china made bosch in it too. Owner said never been changed and bought after 2008 time frame. Plug still looked like new to me so back in it goes. Even though I had German, Brazil made bosch on hand and Japan made NGK's. I dont replace plugs if their still doing what they suppose to.

Issue was jelled old mix. Showed him and put e-free mix of mine in.

Title: Re: Stihl 066 660 MS660
Post by: Cut4fun . on May 02, 2020, 02:36:33 pm
Something I like to do on the 66 saws in past. Instead of removing inner cage now. I just started drilling them open in the front with 6 1/4” hole. 2 side by side 3 high. Forgot dang pic of that for new guys.

Been running the VPracing oil 40:1 and little fat aka rich. Guessing close to 12k.

Always liked to run the dual port covers in past. So got this $23 dp cover from SawSalvage.co.
Imo cover it came was good to go with its little front opening. But I just couldn’t leave well enough alone.
I just like all the dp covers for all these type saws myself.

I just could not see any reason to spend $75 for a homemade bark box these west coast guys are selling. The DP cover does all I need for $23. Pic of the barkbox cover added.