3 series husky timing

[danimal]

How do you fellas advance the timing on this series of saws?
No keyway groove and no woodruff key.
Thanks for any info..

 

[mdavlee]

File the key built in to the flywheel. A 372 don't take much at all and it's too much and starts popping.

 

[jmssaws]

File the key built in to the flywheel. A 372 don't take much at all and it's too much and starts popping.

Ive had 390's pop on me before also.

 

[mdavlee]

Ive had 390's pop on me before also.

Me too but it was more like half the key.

 

[jmssaws]

I don't even mess with a 372 anymore.

 

[danimal]

346-390 R the 2 saws of interest. Have to find me a lil file I guess.

 

[mdavlee]

5/32 or 3/16" chain file works

 

[Chainganger]

Do you file off the right side of the key and push the flywheel to the right and tighten?

 

[RIDE-RED 350r]

File the side of the key that allows you to clock the flywheel in the direction of engine rotation (counter-clockwise as you look at the flywheel side of the powerhead). If you file the other side and clock the flywheel to the right (clockwise) you will retard the timing.

 

[danimal]

Sounds as tho yer statement is correct. Ya want to advance it.
I took a save edge flat file,ground off the bevel on one side, use a mic to measure how much im taking off the woodruff key while its in a vice.
Thats how I do stihls n 2 series hooskys.
Just never felt comfortable messing w/the nubbing in the flywheel of 3 series saws.
How do you measure?
Wont the flywheel have the potention to move n snap the potmetal nubbing off after its cut?

 

[RIDE-RED 350r]

The tapered fit of the flywheel and crank is really what holds the flywheel secure, the main purpose of the key is proper indexing of the flywheel for correct ignition timing, not so much to secure the flywheel.

I have advanced a couple of 3-series Husky with the integral flywheel key... I just eyeballed it but was careful to not get too carried away. Admittedly I would prefer a conventional separate key that I can measure and shoot for a specific thickness.

 

[Chainganger]

File the side of the key that allows you to clock the flywheel in the direction of engine rotation (counter-clockwise as you look at the flywheel side of the powerhead). If you file the other side and clock the flywheel to the right (clockwise) you will retard the timing.

So I had it backwards!

 

[RIDE-RED 350r]

So I had it backwards!

Yes you did... Just think of the direction of engine rotation and the fact that the magnets on the outside of the flywheel trip the coil. Keeping that in mind it's easy to know which direction to clock the flywheel in order to cause the ignition to fire earlier (advance). Just don't get yourself mixed up and file the wrong side of the integral key found on some of the 3-series Huskies.. With a conventional key you can file whichever side and it doesn't matter. File the wrong side of the newer style key that is integral with the flywheel and it won't clock the flywheel the correct direction.

 

[Chainganger]

Got it!

I will file the left side of an interagal key stop the piston, shove the flywheel to the left and tighten

I know the key is a guide not really to keep the flywheel in place

Thanks!