Chainsaw Repair

Husqvarna - Stihl - Poulan - Jonsered - Dolmar chainsaws and more => Stihl => Topic started by: weimedog on September 27, 2015, 07:11:19 am

Title: Stihl 066 carb MS660 Carb question
Post by: weimedog on September 27, 2015, 07:11:19 am
Not a Stihl guy but really enjoying the 660 class saws and want to learn about them. I see all kinds of options and variations.
I see a pile of Walbro options
Tillotson Carburetor HS-320A vs. Walbro Carbs...?

What is the best carburetor to use on a MS660? Money no object?

Maybe the question should b best intake option for a tweaked MS660 work saw.

Title: Re: MS660 Carb question
Post by: Cut4fun . on September 27, 2015, 07:58:48 am
I hope I am remembering right the WJ69 was one I liked. There is a bigger of those too.

Have it listed in a thread here.
Title: Re: MS660 Carb question
Post by: Cut4fun . on September 27, 2015, 08:05:31 am
Spec info from Walbro on WJ carbs.

The carburetors of the WJ series have been designed for professional applications, especially for chain saws from 50 to 100 cc displacement.

Technical Data:
Casting available in the following dimensions in mm:
        Choke Bore        Venturi                     Throttle Bore
        22.19                  14.29/15.08                19.01
        22.19                  15.88                          20.56
        22.19                  16.67/17.46/18.26      21.43
        23.38                  19.05                          21.43

Mounting holes, distance between centers: 31 mm.
Metering system and fuel pump integrated in the carburetor casting.
Can be delivered with or without choke.
Adjustable high speed needles, idle needles and available idle adjust screw.
Available extras: speed governor, fast idle system.
Proper function in any attitude.
Title: Re: MS660 Carb question
Post by: Cut4fun . on September 27, 2015, 10:06:06 am
I only had 1 066 that had that BIG carb on it at bottom of list. Seem hard to find. 

Choke Bore        Venturi                     Throttle Bore
23.38                  19.05                          21.43

Pic of saw is in that 066 thread I bumped up.
Title: Re: MS660 Carb question
Post by: jmester on September 27, 2015, 10:27:34 am
I have run the Tilly hs-320 the wj-67 and the wj-69. They are all good carbs. I have only run them on mostly stock applications. No port work. I like the 320 and the 67 for they have no limiter cabs. I know that you can eliminate the limiters but they seem to lose tune faster. I know the Tilly carb is a good bit cheaper than the walbros. I have one of each if you would like any pics or anything.
Title: Re: MS660 Carb question
Post by: Cut4fun . on September 27, 2015, 10:40:25 am
I have run the Tilly hs-320 the wj-67 and the wj-69. They are all good carbs. I have only run them on mostly stock applications. No port work. I like the 320 and the 67 for they have no limiter cabs. I know that you can eliminate the limiters but they seem to lose tune faster. I know the Tilly carb is a good bit cheaper than the walbros. I have one of each if you would like any pics or anything.

Maybe some Tilley carb specs and wj67?   Wasnt there a Bing carb off a 064 that would work too?
Title: Re: MS660 Carb question
Post by: mdavlee . on September 27, 2015, 12:08:36 pm
The WJ 69 jets are easily removed. Makes drilling the H jet real easy.
Title: Re: MS660 Carb question
Post by: jmester on September 27, 2015, 03:10:56 pm
The specs for the tillotson hs-320 Venturi 18.26mm and the throttle is 21.41mm and the choke bore is 22.76mm. i had to measure the choke bore as there was nothing listed.
The walbro wj-67/69 and wj 76 all have a venturi of 19.05mm and throttle bore of 21.43mm and a choke bore of 22.19 mm. based on the above chart seem like it should be 23.38 mm.
I need to go buy a nice digital mm/inches digital caliper and re measure to  make sure those number are exact.
Title: Re: MS660 Carb question
Post by: Cut4fun . on September 27, 2015, 03:27:35 pm
You can tell the difference in the big wj and the other wj. I took a choke from reg one and set in big one and it wasnt close.
Least that is how a remember it. Maybe I'm just out there.  :-\ :P ::)

I have only seen 1 of those big wj so far. Plus ven is bigger.
Title: Re: MS660 Carb question
Post by: jmester on September 27, 2015, 04:46:57 pm
i am sure that you are right. you have been in a whole lot more saws than I.
Title: Re: MS660 Carb question
Post by: mdavlee . on September 27, 2015, 06:33:06 pm
I'll have to dig into the 3 I have. Never really paid attention to them.
Title: Re: MS660 Carb question
Post by: Cut4fun . on September 27, 2015, 06:46:03 pm
I'll have to dig into the 3 I have. Never really paid attention to them.

You got 3 of the big carb?   

I got 2-3 of the regular ones left.
Title: Re: MS660 Carb question
Post by: mdavlee . on September 27, 2015, 06:49:36 pm
Not sure if there the big ones or not. Have to measure them.
Title: Re: MS660 Carb question
Post by: jmester on October 08, 2015, 08:16:59 pm
Looking for a part list for the Tillotson HS 320A. I have checked Tillotson webpage and could not find anything. Emailed Tillotson to see if they can send me one. Waiting to hear from them. Seems like a bunch of guys sell the carbs online but they don't have a parts list either. Really like the carb but if you can't get parts they are about worthless IMO.
Title: Re: MS660 Carb question
Post by: aclarke on October 08, 2015, 11:45:15 pm
Jason, Likely shares all common HS parts. What ya need?
Title: Re: MS660 Carb question
Post by: jmester on October 09, 2015, 07:11:07 am
Got an email from Tillotson this morning with the parts list. So now I can get what I need. I was looking for the nozzle valve. Or what I call the high speed check valve. Seems there was I couple of different options for the valve. That is why the big stink to find a parts list. So I will call and get some on the way.
Title: Re: MS660 Carb question
Post by: aclarke on October 09, 2015, 09:48:53 am
Good deal!
Title: Re: MS660 Carb question
Post by: jmester on October 25, 2015, 02:39:09 pm
Here is the HS-320 parts list
https://drive.google.com/open?id=0B41db3zMPO8MQmI1aTNWSEdNakQ3X2dwOEpyaU5hem9jS0tz
Title: Re: MS660 Carb question
Post by: Moparmyway on May 12, 2017, 10:00:04 am
Just so I'm clear,
The WJ69 has a larger venturi on some of their carbs .......... so there are two size venturi's on the WJ69's ?
Title: Re: MS660 Carb question
Post by: Cut4fun . on May 12, 2017, 12:53:59 pm
Going by the post below it might be WJ48 WJ-48. As that was my saw I traded off to him long ago. I have only seen and had 1. 

http://chainsawrepair.createaforum.com/stihl/066-stihl/msg2189/#msg2189
Title: Re: MS660 Carb question
Post by: sharkey on May 19, 2017, 04:08:15 am
Anyone know what kind of carb, or specs of same, that the aftermarket Huztl 066 kit is coming with?