STIHL 064 troubles

HolmenTree · August 13, 2018, 07:52:11 PM

Yep the 1122 400 1300 coil is what my first year 064 has.
Check that serial # again...that is the info we need.
But you already have a good coil what you just bought . Do the simple adapter mod pictured above with a bent piece of strap steel and 2 screws.
.010" gap between the flywheel magnet and coil.

Cub · August 13, 2018, 09:57:13 PM

I'll check the number again when I get a chance. It's pretty hard to see. Yes I'll just make up a adapter bracket and use the coil I bought. Haven't had a chance to get after it. Thank you again for the info.

Mad Professor · August 14, 2018, 03:32:42 PM

Quote from: Cub on August 13, 2018, 06:40:51 PM
Mad professor, I read a lot over there about all the coils n flywheel combos. Lots of info. Thank you for the info.
Holmentree, no worries buddy. You were right I wasn't 100% sure that was the serial number. I tried flipping the coil upside down. It just about fits that way but not quite. So your saying the 1122-400-1300 is what my saw should have? Because I found 1 of those too. Thank you guys for all your help. Lots of knowledge

Unless that is NOS bosch coil, it will crap the bed, even then they die early on, same with the 7!@#%^&* they put in the 056, but there is a cheap fix for those. How long who knows?
The adapter for a universal coil might be best bet. I think those have a retard for starting unlike early 064 coils.

Cub · August 17, 2018, 11:21:11 PM

Rigged up a bracket tonight. Should work. Didn't have any wood in the yard to try it out. But will go find a tree to kill tomorrow in the daylight. Thanks for all your help guys!!!

Cub · August 20, 2018, 11:10:19 PM

Alright. Tested out the saw. Cut down a 22 inch white ash. Saw ran great for the notch and back cut. Once the tree was down I limbed it then went back to the butt and started piece cutting 24 inch long blocks. About half way through the fourth cut the saw stumbled all over itself and the only way I could keep it running was hold it wide open and it would just barely idle and it smoked a lot. So I let it die gave it a minute and fired back up and made 4 more cuts and it did the same. Let it die again. Waited a minute fired up made 2 more cuts and it stumbled again. I let it die but this time when I fired it up it and held it wide open it just stumbled. So I just stopped grabbed the 440 and finished the tree. Any ideas? I'm thinking carb issue?

HolmenTree · August 21, 2018, 07:51:08 AM

That's why I hate doing saw diagnosis over the interenet :

You said smoking alot , it's possible there is a leak in the crankcase gasket at the oil tank ......
Do a proper leak test for both the carb and crankcase.
Is the muffler screen plugged....

Cub · August 30, 2018, 10:41:34 PM

Anything is possible I guess. I will have to take it to the dealer to have tests done. I don't have the tools for that. Muffler screen is not plugged. Brand new dual port cover. I'll get it to the dealer n see what they say.

Mad Professor · September 12, 2018, 06:19:56 AM

Get a mightyvac for ~ $50. Won't be much more than a dealer visit. Do your own pres/vac testing.

Cub · November 03, 2018, 09:37:22 PM

So update on the 064. Haven't had a need for it since the last post until a few weeks ago. I knew I had problems with it so I took it to the dealer to have them check it out. They through a carb kit in it fuel filter and tuned the carb. Said everything else is good. So once I got it back I used it tge next day and ran a few tanks of gas through it. It ran great. Following weekend I used it again and after I dropped a few big trees it started stumbling again just like before. I quit using it for the day. Got home and tried getting it going. It started but I couldn't get the carb adjusted to a happy place to idle good accelerate good and run good at wot. Took it to the woods with me today to try it again and it wouldn't even start today. Not sure what else to look at. It has the walboro wj-6 carb on it.

Mad Professor · November 06, 2018, 11:31:55 AM

Using a new stihl universal coil w/adapter?

1) pressure/vac test

2) check all wires from coil/switch for shorts, coil body for good ground to cyl

3) check carb insides/clean it, fuel line + filter

motzingg · November 06, 2018, 01:01:33 PM

FUN, these are the kind of problems that make people hate working on saws, trimmers, etc. :D

I think going down the diagnosis tree, everyone right away jumped over the ignition thing because usually heat related problems are from a coil that is on its way out.

I would start by switching the coils back to back and seeing if the problem starts back up or gets worse with the old one. Try to find a test that can reliably turn it 'on' and repeat the test cold, hot, under different conditions.

I dunno the design of that carb but if it has a rubber check valve it it, that could be the problem. They will start puking fuel like crazy into the intake, only run wide open, and be blowing a lot of wet unburned fuel exhaust/black goo out the exhaust when that happens, then eventually die.

I have a BG86 Stihl blower that i rebuilt the carb in, finally threw in the towel and bought a new carb yesterday, rebuild kit didn't fix it, pumping way too much fuel in.

motzingg · November 06, 2018, 01:08:49 PM

Ah, just re-read the last post.... maybe that coil bracket moved?

You say you got a few tanks of gas through it before it conked out, sounds like something else major fail. Timing slipping for one reason or another.

Cub · November 07, 2018, 09:57:48 PM

Mad professor. Yes new coil with adapter. Dealer put new filter and carb kit in it. I thought maybe he pressure/vac tested it because he said everything else was good. Inside of the carb was a little dirty and pump was a little stiff. Maybe he didn't test it. I dropped it off at the dealer to look at again on Monday because he said if I still have problems to bring it back. Said he would look at it Tuesday but I haven't heard from him yet. Motzingg. I know the feeling. Had that on an 026 I worked on for a friend. Rebuild the carb. Still wasn't right so he brought it back. I put a different carb on n it's still running strong. That was 4 years ago. I think it is a carb issue because even when stone cold it won't start on choke. I have to unchoke it and hold throttle wide open and pull a few times then I can get it to run. But if I continue to hold it wot it doesn't have the power to turn the chain. Just stumbles and smokes like a locomotive. Once I let off the throttle it dies. Thank you guys for all your input and ideas. I really appreciate all the knowledge on here. Hopefully it gets figured out soon. I need my big saw!! ;D

Furist Shervice · May 06, 2022, 12:39:41 AM

Quote from: Cub on November 07, 2018, 09:57:48 PM
Mad professor. Yes new coil with adapter. Dealer put new filter and carb kit in it. I thought maybe he pressure/vac tested it because he said everything else was good. Inside of the carb was a little dirty and pump was a little stiff. Maybe he didn't test it. I dropped it off at the dealer to look at again on Monday because he said if I still have problems to bring it back. Said he would look at it Tuesday but I haven't heard from him yet. Motzingg. I know the feeling. Had that on an 026 I worked on for a friend. Rebuild the carb. Still wasn't right so he brought it back. I put a different carb on n it's still running strong. That was 4 years ago. I think it is a carb issue because even when stone cold it won't start on choke. I have to unchoke it and hold throttle wide open and pull a few times then I can get it to run. But if I continue to hold it wot it doesn't have the power to turn the chain. Just stumbles and smokes like a locomotive. Once I let off the throttle it dies. Thank you guys for all your input and ideas. I really appreciate all the knowledge on here. Hopefully it gets figured out soon. I need my big saw!! ;D

Sorry to wake up an old forum. But cub!! 3 1/2 years later, I'm having the same exact problem that you're mentioning here. Did you ever figure it out??? This has been a 6 month battle for me. FULL rebuild.
Thanks!

beenthere · May 06, 2022, 01:27:13 AM

Furist
Welcome to the Forestry Forum.
Click on Cub and send a PM. Been a few months since Cub has been active.

Cub · May 27, 2022, 07:42:27 AM

I had given up on it. But if I remember correctly 2 of the bolts that hold the cylinder down to the crankcase stripped and it was sucking air. My son took the saw drilled out the holes in the crankcase put helicoils in and it still don't start. Now I believe there's a carb issue because it pours fuel everywhere when trying to start. We haven't touched it since. Also somewhere in the "fixing" of it I realized that the groove on the flywheel had gotten messed up so it was out of whack. I found a used flywheel and then the saw ran good until those bolts came loose.