Home>Saw Repair Kits>ST 066 MS660 Parts (Complete Saw Repair Kits)>Complete Aftermarket Repair Parts for STIHL MS660 066 Chainsaw Engine Motor Crankcase Crankshaft Carburetor Fuel Tank Cylinder Piston Ignition Coil
Complete Aftermarket Repair Parts for STIHL MS660 066 Chainsaw Engine Motor Crankcase Crankshaft Carburetor Fuel Tank Cylinder Piston Ignition Coil

Complete Aftermarket Repair Parts for STIHL MS660 066 Chainsaw Engine Motor Crankcase Crankshaft Carburetor Fuel Tank Cylinder Piston Ignition Coil Item NO: CS66020A

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  • Aftermarket complete repair parts for Stihl ms660 066 chainsaw
Product Name Complete Aftermarket Repair Parts for STIHL MS660 066 Chainsaw Engine Motor Crankcase Crankshaft Carburetor Fuel Tank Cylinder Piston Ignition Coil
Item NO CS66020A
Weight 9.5 kg = 20.9439 lb = 335.1026 oz
Category Saw Repair Kits > ST 066 MS660 Parts (Complete Saw Repair Kits)
Brand Farmertec
Creation time 2016-12-16

Wrap around handle bar with elbow and screws for Stihl ms650 ms660 066 065 chainsaw is available, click the link below to get one: 



Matt Rentz

This is the first saw I've ever put together from parts and it assembled perfectly, I did it in one day. Small adjustment to the carb and it runs perfectly. i will probably buy another one.



I bought my kit in April and I have to say it was really fun building the saw. my kit wasn't missing any parts and it all went together very easily. It has a lot of power! I ended up replacing the crank seals, clutch, handle bar( mine bent very easily) and oil pump. All in all very happy with the saw and I just put together another kit saw ended up going with the 372xp clone but I see they have the 046/460 kit now so that's next on my list



Saw went together as expected, ran approximately 4 tanks of gas through the saw so far and it was performed well.


Brian J

Love this kit easy assembly and quality parts at a bargin price, this saw is proving to be extremely reliable.



I ordered and built a 660 kit for a friend it was all very good quality - 1 or two small parts (mine was very early kit so problems resolved now) I enjoyed putting everything together and running the saw afterwards it cuts very well with lots of power spare even on a 36” guide bar and chain. I would recommend this kit to anyone and will buy again myself.



I love this saw. Always wanted a 660 but never really needed one especially because of the price. I put this together in about 3 hours. It fired right up and ran great. Have one tank of fuel ran through it mixed at 25:1. So far awesome saw. And I plan on buying plenty more.


J negrin

the 660 kits are really good value for what you get. Very capable saws for bucking or running a mill. Have a look on youtube for bolt by bolt videos. Take your time and enjoy.


Shane Davis

Never really expected to be building chainsaws, but after watching several people building these saws on youtube with great success, I thought I would give it a shot. I had a few things I had to swap for OEM, but very happy with my purchase. Saw runs great and I now have plenty of confidence to work on saws and I'm loving it. New hobby! Thanks Hutzl!!


Rob Hammond

Has anyone had any problems with the handlebar on MS660 ???



Es handelt sich um einen Super bausatz, am besten für Leute die schon ein gewisses Grundwissen mitbringen. Mit ein paar kleinen Veränderungen ist sie Perfekt.



Awesome saw just missing a few bolts



Bought this kit a month ago with the big bore kit also.. all parts were of really good quality.. both cylinders were really good, coating was perfect did not have to touch it other then clean before putting it togather.. nothing was missing went togather really easy only issue I have with it is chain adjuster.. have a factory one ordered. Was a really good project and man do it have power. Awesome on my chain saw mill.. plan on ordering the 361 kit next...


Paul N.

Assembled 2 of these. Did some tuning and cutting with 28 bar on one. Worked very well.The second broke the recoil when the decomp valve closed as it was firing. Ordered some extra recoil parts and they are here now. That one has the big bore kit. If it works as well as the other I will be happy. Was missing a couple screws. Chain tensioner is poor quality.



This was my first build. I took my time and everything went together perfectly. I did replace crank seals and bearings because there were a lot of aluminum shavings in the crankcase and the seals from when the crankcase bolt holes were milled. For this reason, I wish they did not assemble these parts before shipping. Make sure you check for this before just slapping everything together.

You may find that the supplied bar/chain adjuster is a little rough and difficult to work. You can track down a OEM Stihl one (which will definitely work more smoothely) or you can just pack the supplied one with grease and deal which does help.

Other than that, the saw has treated me well. I've got a 28 bar on it and have used it to cut and mill a number of large mahogany trees. Plenty of power and reliable so far.

A new Stihl ms660 in my area is about $1500 new, so at about $300 delivered this has been great.


Colton G

kit was missing carb bolts but other than that was complete and fun to build. used matt o's bolt for bolt youtube videos. runs and cuts great


Jim W

I finished putting this saw together recently and really enjoyed the challenge. I had two piston cir clips missing and the plastic cylinder shroud had a small fracture where one of the brass grommets were pressed through. I think most of the parts are good and they have inherited much of the OEMs original quality. One exception is the chain tensioner it needs to be shimmed to keep it aligned. The cylinder was clean without burrs. LOTs of compression.
Service:Thanks for your feedback. If there are some items you can not use,we may make a partial refund for you. Thanks.


Brett Besser

You will have to ajust kill switch by bending it to shut the saw off. The chain adjustment is useless made of alloy most likely aluminum does not work at all you will have to switch to the Stihl OEM part. I recommend using OEM on throttle control weak and raddles around along with kill switch. The clutch drum is a little tight but you can get it to work. Other then this few issues a fantastic saw and an outstanding value


COPE Small Engine

We purchase these saws to build and resale. Saw went together really easy. A few things to note: there will be parts missing. Only reason I say this is because we have watched plenty of youtube vids and just about all have said they have had at least a couple things missing. Really it is small things. Mine had the carburetor flange nuts missing and also had the wrong bar studs. The seals come already installed in the case halves. Makes it difficult to install the crank without reversing the seal.
With that being said, just order a seal kit, they are really inexpensive. As well as the flange nuts for the carburetor. other than that, the saw fired right up and seems really strong. Will buy more.


J negrin

First time building a saw. It went together easily. Chack YouTube for bolt by bolt videos. Saw stars easily and oils well.


Joe Negrin

First time building a saw. Saw went together smoothly. Check out YouTube for bolt by bolt videos. Saw started easily and I have been pleased with it.
  • 29M58S
    Got three of the test saws back for maintenance type things.....they have all been out since this time last year. Seem like they are doing just fine in the grand scheme of things. ALSO stuck together a low top 372xpw (original edition) saw, ALL OEM; for a fellow who has run 390's for the last ten years and is beginning to feel the results. So trying to build a torque enhanced saw with the weight of the 365 and split the difference between a 372xt and 390 for power. AND a follow on the the weight loss program I have embarked on since this time last year....have really made progress and now that the routine is BACK in place hoping to settle into this work pattern and get BACK to where I was as best possible before I was messed up first by a goofy Highway Work Schedule, which first was about only living on 3 hours of sleep a night for a couple of years during winter. THAT precipitated into me being groggy tired ALL the time; having an accident falling out of a tractor and tearing the Pectoral muscle completely whats called a weight lifters tear; , a complete detachment. THE the lack of sleep issues continued, weight gain continued until my hip began to fail, exacerbating all things...until finally I had to retire. Spent the last summer first re-evaluating priorities, getting a hip replaced and now resetting both priorities and life in general.....this is the result.
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  • 17M8S
    These saws really aren't all Farmertec, they are blended with other vendors parts. They ALL started with Farmertec Kits, but ALL without exception have parts from a variety of sources, from OEM to random ebay stores. Most of these are featured in build video's from last year. How those saws are used and a snap shot of what they are expected to do while in the test program. Some tips from someone who knows a lot about logging and processing the timber to be sold. And I need to make a point, in a follow up video. While these saws may not have swayed him from the Husqvarna brand saws, and they are a blend of parts NOT all Farmertec some other Chinese and Taiwanese manufacturers parts mixed in with OEM ( German? NOT always! ) There have been NO hard part failures this year with any of the test saws. None. So its not about reliability now, its just feel and preferences. Maybe if they go another year and another .... I think what happens is tools regardless of origin earn their respect over a period of time. Over a period of years if these saws keep doing what they are now they may have a different level of respect. SO now the mission changes. For can we make them can we make them preferred. A Huge change! There is a growing sub culture around these saw. And here is the delima...A LOT of that is because of the I built this ownership of building these. I'm certainly guilty of that, one of my all time favorite saws is my Farmer Jones MS660's and its STILL running strong and is a Go To saw for big work. Showed up in a video this fall. And that's the roots of the sub culture or fan base....a DIY mentality and the ability to roll your own with a gazillion different parts from OEM to AM. Now the power heads are coming complete....for the same kind of money as the kits...SO will that blunt the growth of the DIY growth?? Or will it accelerate it? A subject for the next video..:) Note: Test Saw #3 is the Better Build I did January 2018, with a different crank, Hyway Pop Up Piston, HyWay ha
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  • 7M
    FarmerTec G660 Stihl RS new chain LS+ 30ml 50cm ES Light bar stejar semiuscat 43cm 13300-13500rpm. Timpii R1 (initial carb setting after break in) 10.1s/9.9s R2 9.8s R3 9.4s 10.64s (high load) R4 9.96s 11.34s (high load) R6 10.72s
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  • 1M54S
    Timpii: MS661C-M 9.02s 9.78s FarmerTec G660 9.5s 10.60s Stihl MS661C-M/7 pin/13300rpm FarmerTec Holzfforma G660/7 pin/~13300rpm ES Light bar - 50cm Stihl RS new chain LS+/HP Ultra 30ml
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  • 22M59S
    So I was going to get started on fixing the McCullough Timber Bear. Then My Buddy Will stopped by with his new G660 still in the box. So we collaborated.
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  • 4M1S
    New out of the box Farmertec G372 vs G660. In my opinion the G660 takes the cake. Both are good saws out of the box and with some adjustment can become excellent tools.
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  • 6M18S
    The FarmerTec G660 is wearing a 32 bar with full comp chain and the Makita/Dolmar 7910 is using a 24 bar and chain. The wood is aleppo pine which is a hard wood pine and is full of sap and is very dense.
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  • 8M18S
    After five tanks of mixed fuel through this chiansaw I've decided to tune it to 13,500RPM. These saws can be found at and are an excellent deal. They are compatible with Stihl's 660 and 066 chainsaws. Overall I am very pleased with this saw~
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  • 4M24S
    Using my Farmertec G660 chainsaw I make a simple bench out of a log. This is my first time making a bench like this and in my own opinion it is a little crude but it serves it's purpose.
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  • 7M51S
    Unboxing of the Huztl Holzfforma G660 chainsaw which is compatible with Stihl's 660 and 066 magnum chainsaws. Well-assembled and ready to run!
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  • 9M
    First start up and cutting wood with the Holzfforma G660 out of the box. No adjustments to the carb were made.
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  • 10M15S
    Unboxing of a Farmertec MS660 chainsaw parts kits. It will be fun to build this kit by yourself!
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  • 2M41S
    The Huztl MS660 chainsaw sounds and works great!!!
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  • 10M53S
    Share some cutting skills~ Try it yourself with Huztl chainsaw kits!
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  • 9M38S
    Huztl MS660 Chainsaw against maple trees
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  • 27M
    Took a Farmertec MS660 and bolted on a few things to hopefully make it run better. Nice air filter! ;-)
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