Stihl 064, No Spark...

[bulletpruf]

Ok, so I picked up a complete 064 for short money a year or so ago. I don't know if it was running or not when I got it and like a dummy, I didn't check for spark before tearing it down. Serial number is 123965831; I believe it to be manufactured in 1991, give or take a year.

I went through the saw and installed Caber rings, rebuilt the Bing carb, gutted the muffler, etc. Threw a bunch of NOS parts at it, too (tank, top cover, 3/4 wrap, etc). Also got a new 28" Stihl roller tip bar.

And when I tried to fire it up, no spark (or maybe a very faint intermittent spark).

It has a single keyway flywheel; probably the 1204, but I can confirm. The coil is the CDIC 1122 400 1303.

I didn't get any pics of the case without the coil, but the CDIC coil is bolted down in two locations.

Flywheel to coil gap is good. I'm sure I tried a different spark plug. I'm guessing it's a bad coil.

I am aware of the thread that DD started on 1122 ignitions: https://www.arboristsite.com/threads/064-066-ms660-18-flywheels-7-coils.282162/

Any ideas?

Scott

As purchased...

 

[jacob j.]

The CDIC coils (1122 400 1303 - 064, 1122 400 1307 - 066) are pretty famous for burning out.

If you have the single-key 1204 flywheel, then you have the option of finding a 1201 or 1203 flywheel, re-indexing your
1204 flywheel and running without the key, or re-broaching the 1204's keyway and running a 0000 400 1300 "universal" ignition.

 

[bulletpruf]

The CDIC coils (1122 400 1303 - 064, 1122 400 1307 - 066) are pretty famous for burning out.

If you have the single-key 1204 flywheel, then you have the option of finding a 1201 or 1203 flywheel, re-indexing your
1204 flywheel and running without the key, or re-broaching the 1204's keyway and running a 0000 400 1300 "universal" ignition.

Thanks for the details, Jacob.

I like the idea of running the 1300 universal coil; they're readily available. Are they also unlimited?

However, I checked eBay and the only flywheels I'm seeing are 1204 or one that's stamped 1203 and 1204, single keyway.

How would one go about re-indexing a 1204 flywheel? Also, I don't have the tools here to re-broach a keyway the right way, but I think @Mastermind is set up to do this...

Scott

 

[jacob j.]

Scott -

The 1300 universal coil is unlimited, so no sweat there.

I've re-indexed the 1204 flywheels and run them without a key with no problems.

I start at about 26° from the leading edge of the first magnet to the bottom edge of the
first laminate on the coil. Sometimes it takes a little adjusting to find the sweet spot
for timing (it can be time consuming). There can be a minor variation in the same model
of ignition, especially if it's a used coil (depending on how hard it was used).

On an 064 I built for a member here, I think I ended up close to 29° BTDC. I usually lap
the flywheel to the crank with a small amount of rubbing compound.

 

[bulletpruf]

Scott -

The 1300 universal coil is unlimited, so no sweat there.

I've re-indexed the 1204 flywheels and run them without a key with no problems.

I start at about 26° from the leading edge of the first magnet to the bottom edge of the
first laminate on the coil. Sometimes it takes a little adjusting to find the sweet spot
for timing (it can be time consuming). There can be a minor variation in the same model
of ignition, especially if it's a used coil (depending on how hard it was used).

On an 064 I built for a member here, I think I ended up close to 29° BTDC. I usually lap
the flywheel to the crank with a small amount of rubbing compound.

Ok, I ordered a new aftermarket 0000 400 1300 coil. Should be here Sunday.

I'm not terribly worried about running without a key. As I understand it, the key really just locates the flywheel initially and isn't needed to keep it in place once the flywheel nut is tightened. But if I'm going to have to do trigonometry to get it in the right spot, I might see if I can source a 1201 or 1203 flywheel (these would both have two keyways, right?) or send my 1204 flywheel off to have a new keyway broached.

Thanks

 

[Mastermind]

Thanks for the details, Jacob.

I like the idea of running the 1300 universal coil; they're readily available. Are they also unlimited?

However, I checked eBay and the only flywheels I'm seeing are 1204 or one that's stamped 1203 and 1204, single keyway.

How would one go about re-indexing a 1204 flywheel? Also, I don't have the tools here to re-broach a keyway the right way, but I think @Mastermind is set up to do this...

Scott

I can broach the flywheel for you.

 

[bulletpruf]

I can broach the flywheel for you.

As you were answering this, I was sending you a message on another site... I'll send it here.

 

[drf256]

I may have a working coil for you if you can’t find the flywheel.

 

[bulletpruf]

I may have a working coil for you if you can’t find the flywheel.

Ok, so a limited coil? I'm hoping to go with an unlimited coil at this point. Looks like I can get there if the unlimited coil will fit my saw.

 

[bulletpruf]

Verified the bolt pattern on the saw for the coil today; there are at least two different patterns, maybe more. Can anyone confirm if an unlimited 0000 400 1300 coil will bolt up here?

Also verified that I have the 1204 flywheel.

Thanks

 

[jacob j.]

Scott - you can mount just about any Stihl coil on that case. The universal coil will fit just fine.

 

[bulletpruf]

Scott - you can mount just about any Stihl coil on that case. The universal coil will fit just fine.

Excellent! Thanks, Jacob.

Scott

 

[bulletpruf]

Follow up question - will a 066 aluminum flywheel work if it has two keyways? Cast numbers are 1122 400 1209A and 1122 400 1214.

 

[Mastermind]

Follow up question - will a 066 aluminum flywheel work if it has two keyways? Cast numbers are 1122 400 1209A and 1122 400 1214.

066 flywheel is too thick to fit the 064.

 

[drf256]

Scott, I have a bunch of parts. Have coils, some with the extra tab hanging off them. All checked and working.

Probably a few flywheels too. Not sure I wanna let a dual slotted one go, as I plan to build myself an 064 one day outa what I’ve got. I could give you the measurement of where the second slot would go for correct timing.

If Randy can broach yours, or you could figure out the timing and eliminate the key, you’d probably be better off getting setup for the regular coil. I’d prefer that myself to avoid any future issues.

 

[bulletpruf]

Scott, I have a bunch of parts. Have coils, some with the extra tab hanging off them. All checked and working.

Probably a few flywheels too. Not sure I wanna let a dual slotted one go, as I plan to build myself an 064 one day outa what I’ve got. I could give you the measurement of where the second slot would go for correct timing.

If Randy can broach yours, or you could figure out the timing and eliminate the key, you’d probably be better off getting setup for the regular coil. I’d prefer that myself to avoid any future issues.

My unlimited universal coil should be here today. If it fits, and I think it will, I'll be sending my flywheel to Randy to get it broached.

Thanks,

Scott

 

[drf256]

My unlimited universal coil should be here today. If it fits, and I think it will, I'll be sending my flywheel to Randy to get it broached.

Thanks,

Scott

I hear Randy wraps sandpaper around his leg and uses that to sand-in the keyway on them flywheels.

 

[Mastermind]

I hear Randy wraps sandpaper around his leg and uses that to sand-in the keyway on them flywheels.

Don't be giving my secrets away Al !!!

 

[bulletpruf]

My unlimited universal coil should be here today. If it fits, and I think it will, I'll be sending my flywheel to Randy to get it broached.

Thanks,

Scott

It fits perfectly.

My flywheel is headed to see a gentleman in Tennessee with sandpapery legs...