The MS661 is for sale in the US again

[rich450es]

shitt you cant say poorn.....lol

 

[blsnelling]

Advancing the ignition refers to the spark happening before the piston reaches TDC. To advance the ignition is to cause the spark to happen earlier before TDC. To retard ignition is to make it happen closer to TDC.

 

[Kfd518]

OK MR. Wizard,

let us make some elementary assumptions,

1. we are talking chainsaws

2. the current is generated by rotating magnets

3. the magnets don't move (centrafugally they are static and molded into the casting)

4. the flywheel is mounted to the crankshaft

5. saws don't have onboard current storage (battery) OK some old macs did

6 an event can not happen before it happens.




Sure with some fancy programming and an onboard power supply you could conceivably make a spark happen before the event of the magnets passing the pick-up.

I don't see it happening.

Go back and read my post again, you can NOT have an event before it happens.

Clear as mud?

Ever think of the fact the the magnet timing is not placed directly at top dead center? And using capacitors they can indeed store the energy which is then released by the transistor which is built into said circuit board of the modern ignition module not just a "coil" anymore. Saws have had current storage besides batteries as long as any form of capacitor has been around. So yes spark advance relative to the point in the revolution where it would be if following a static baseline instead of computer generated ignition curve is possible, but not in the literal sense you are stating. Not before the current generation merely before top dead center. Information above taken directly from Stihl documentation.

 

[Mastermind]

You killed muh thread Jocko...

I've got three 661s here right now....

 

[Kfd518]

Did kind of go belly up, good afternoon MM.

 

[MustangMike]

R U going to do them after the Holidays, or are they in process right now???

 

[Mastermind]

I'm taking off till after the new year.......