Chainsaw Repair

Husqvarna - Stihl - Poulan - Jonsered - Dolmar chainsaws and more => Stihl => Topic started by: man of stihl on May 01, 2011, 07:15:08 pm

Title: 066 Stihl
Post by: man of stihl on May 01, 2011, 07:15:08 pm
I have a ported GTG 066 that has the choke parts removed for better air flow. I may be going to a race in a month or so that requires a working choke, so I was going to take the carb off my 064 and put it on my 066. Having both filter covers off, the 066 carb is visibly much bigger than the 064 carb. The 064 carb is a wj35 and the 066 carb is a wj48. I certainly do not want to put a smaller carb on my 066. Any one know of a good carb swap for the wj48? Or I wonder if i can just buy the choke parts for the one i have?
Title: Re: 066 Stihl
Post by: Cut4fun on May 01, 2011, 07:52:03 pm
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 Ø                    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: 066 Stihl
Post by: Cut4fun on May 02, 2011, 02:04:22 pm
Will the 064 wj choke rod going through carb come out and fit in the 066 wj? If so couldnt you make your own choke plate to fit the bigger carb bore?

Whats the rules and class for this? 
Title: Re: 066 Stihl
Post by: man of stihl on May 02, 2011, 06:56:24 pm
My stihl dealer says they can't get parts for the wj48. That is a good idea about making my own plate. The wj48 bore is 1mm bigger than the wj35. The rod is the same length i think. so maybe i'll aquire a junk 066 carb for the choke parts. The class is 60cc and 100cc with no two piece head and working choke. jred said they didn't check their chokes last time but I would like a working choke for it anyhow.
Title: Re: 066 Stihl
Post by: HolmenTree on May 03, 2011, 10:41:07 am
Here is my 064 I modded over 20 yrs ago, still runs strong today. Mine has a 084 carb on it . As you notice it has no choke as I used it in competition no problem without the choke. You need to carry a little Visine eye drop bottle in your pocket filled with mixed gas. In the staging area when no one is looking squirt a shot of gas into the carb through a 1/8" hole drilled in the filter cover just below the cover's knob.

Willard.
Title: Re: 066 Stihl
Post by: man of stihl on May 03, 2011, 04:44:52 pm
I do have an 084 carb. Hmmmmmm.
Title: Re: 066 Stihl
Post by: Cut4fun . on May 03, 2011, 05:17:04 pm
Hey take a Digital LCD Caliper Micrometer or old school dial one and see what you get for the choke bore in mm. I found 2 different extra wj's and they both have 22.28 mm choke bore and the one on my 066 same.

Your wj48 must be this big one.    23.38                 
Title: Re: 066 Stihl
Post by: Cut4fun on May 03, 2011, 05:28:27 pm
I can send you the choke parts and it could be in there for looks  ;) or make a larger plate.
Title: Re: 066 Stihl
Post by: man of stihl on May 03, 2011, 05:33:33 pm
Hey take a Digital LCD Caliper Micrometer or old school dial one and see what you get for the choke bore in mm. I found 2 different extra wj's and they both have 22.28 mm choke bore and the one on my 066 same.

Your wj48 must be this big one.    23.38                 
Yes. it is the 23.38. But i was thinking. I wonder if the smaller choke plate would work?
Title: Re: 066 Stihl
Post by: Cut4fun . on May 03, 2011, 05:39:31 pm
I would prime and have the saw working prior to. It should hold the prime for a awhile and before racing give it another squirt.

IF some one wanted to see the choke then as long as linkage was hooked up etc it would look like a working choke.
Title: Re: 066 Stihl
Post by: man of stihl on May 03, 2011, 05:57:06 pm
Thats what i was thinking. ;D
Title: Re: 066 Stihl
Post by: Cut4fun on May 03, 2011, 07:03:44 pm
How long you got? I can pull one and put in bubble wrap envelope for you.

(http://i59.photobucket.com/albums/g289/doemaster789/Partner550/formula002.jpg)
Title: Re: 066 Stihl
Post by: man of stihl on May 03, 2011, 07:20:06 pm
That would be GREAT! I have a month, so no hurry. Thanks Kevin. O0
Title: Re: 066 Stihl
Post by: HolmenTree on May 03, 2011, 11:40:14 pm
Put the 084 carb on, with choke if you feel you need it :D
Title: Re: 066 Stihl
Post by: man of stihl on July 25, 2011, 06:39:04 pm
Put the 084 carb on, with choke if you feel you need it :D
Holman. How did you make the studs work? The pattern on the 084 is wider?
Title: Re: 066 Stihl
Post by: Cut4fun . on July 25, 2011, 08:15:14 pm
Here is the specs on  Tillotson Ht 5 and up   http://www.tillotson.ie/docs/HTPartsList.pdf
I used HT-1 when possible on 084's   there is 2 and 3 also but I cant find the specs for 1-3 right now.
Title: Re: 066 Stihl
Post by: HolmenTree on July 28, 2011, 03:16:10 pm
Put the 084 carb on, with choke if you feel you need it :D
Holman. How did you make the studs work? The pattern on the 084 is wider?
I did this mod in 1988, just took a look at it and see I just made a adapter plate from a piece of 1/4" aluminum plate with studs mounted in it. Mounted in this order: plate, tank housing, carb. I used the 084 intake ring, had to drill out the tank housing hole for the expanded intake elbow to accept the bigger ring. I'm sure I used the stock 064 intake elbow but might have used a 084.
Alot of water has passed under the bridge in 23 years. ;D
 
Title: Re: 066 Stihl
Post by: man of stihl on July 28, 2011, 08:22:45 pm
Did you notice any gains with the 084 carb?
Title: Re: 066 Stihl
Post by: HolmenTree on July 29, 2011, 12:12:37 am
Did you notice any gains with the 084 carb?
I milled 25thou off the cylinder base, 80 thou [2mm] off the intake skirt, 4 deep finger ports alongside the transfers, gutted muffler, indexed spark plug.
The powerhead needed the 084 carb to feed it.
If I did it again I would install the adapter plate between the tank housing and carb. That way no one could see the mod thru the gap of the top covers. Countersunk cap bolts bolting the adapter to the tank housing with nuts on the cylinder side of the tank housing through the original stud holes. But maybe there was a reason I put the adapter plate on the cylinder side of the tank housing, maybe the larger hole in the housing took out those stud holes. Plus the hole in the plate would need a recession around its perimiter milled to accept the lip of the rubber intake manifold.
I'd have to take the carb off to see what I did.
Hours and hours of tinkering I did back then :o
Title: Re: 066 Stihl
Post by: man of stihl on July 29, 2011, 05:24:08 pm
That's great. Definitely have to think outside the box on that conversion.  8)
Title: Re: 066 Stihl
Post by: man of stihl on November 23, 2011, 02:40:33 pm
Here it is Kevin. ;)
Title: Re: 066 Stihl
Post by: Cut4fun . on November 23, 2011, 02:54:26 pm
Here it is Kevin. ;)

Thanks  8) . It was hiding from me for some reason.    ???
Title: Re: 066 Stihl
Post by: man of stihl on November 24, 2011, 08:16:39 am
Question. Will a ms660 fuel tank, cylinder cover, and air cleaner cover work on a 066 crankcase and cylinder?
Title: Re: 066 Stihl
Post by: Freakingstang on November 26, 2011, 07:02:35 pm
Is it an old redlight style 066?  To put all the 066/660 newer covers on an old saw requires the new tank and all the carb cover pieces. If I remember correctly, there is one bolt hole for the hood that won't work with the old style case. Like I said, iirc.... I put never covers on one of my trashed redlights and remember something not lining up but it worked and function. You have to have the newer tank though and if buying them it isn't really cost effective to do the swap.
Title: Re: 066 Stihl
Post by: Cut4fun on November 26, 2011, 07:08:18 pm
Is it an old redlight style 066?  To put all the 066/660 newer covers on an old saw requires the new tank and all the carb cover pieces. If I remember correctly, there is one bolt hole for the hood that won't work with the old style case. Like I said, iirc.... I put never covers on one of my trashed redlights and remember something not lining up but it worked and function. You have to have the newer tank though and if buying them it isn't really cost effective to do the swap.

Welcome to the site Steve. Anywhere you can help out have at it.

Also feel free to list those saws and parts you have for sale. Now dont make us fight over them  ;D

Also cut4fun and chainsawrepair name is me. Kevin.
Title: Re: 066 Stihl
Post by: man of stihl on November 26, 2011, 07:19:57 pm
Is it an old redlight style 066?  To put all the 066/660 newer covers on an old saw requires the new tank and all the carb cover pieces. If I remember correctly, there is one bolt hole for the hood that won't work with the old style case. Like I said, iirc.... I put never covers on one of my trashed redlights and remember something not lining up but it worked and function. You have to have the newer tank though and if buying them it isn't really cost effective to do the swap.
It was not originally a 066 red light was it Kevin? The handle is c-racked and i was thinking about changing it over to 660 covers. Thanks for your reply Freakingstang.
Title: Re: 066 Stihl
Post by: Cut4fun . on November 26, 2011, 07:22:43 pm
I'm not 100% on that one. Show him some pics. He would know. I dont think it was a red light. But it was a older one with smaller crankshaft bearings and metal flywheel.
Title: Re: 066 Stihl
Post by: Cut4fun . on November 26, 2011, 07:25:36 pm
only 2 I can find of it.

(http://i59.photobucket.com/albums/g289/doemaster789/Projects/Projectsaws012.jpg)
(http://i59.photobucket.com/albums/g289/doemaster789/Projects/Projectsaws023.jpg)
Title: Re: 066 Stihl
Post by: Freakingstang on November 26, 2011, 07:44:32 pm
Yeah thats the same case as a redlight. Most 064 early 066s didn't have the redlights but if it is an 064 case idk if the covers will work as they had a narrower case... I might still have some 066 parts kicking around too
Title: Re: 066 Stihl
Post by: Cut4fun . on November 26, 2011, 07:59:28 pm
Steve that 066 could use a MS660 recoil cover on it too. If that helps any.  ??? 
Title: Re: 066 Stihl
Post by: Cut4fun . on September 27, 2015, 08:07:15 am
Bump for someone looking for info on this.