Author Topic: How to test the coil in a two piece trigger/coil ignition setup  (Read 1397 times)

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Offline 660magnum

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Ignition system testing . . .

This does not talk about testing the coil itself. It came from the Dolmar 340/420 service manual. This saw had a single piece coil setup.

With the present day single piece coil pointless ignitions . . .

Accurate testing of the ignition module is only possible with sophisticated test equipment.

For this reason it is only necessary to carry out a spark test in the workshop.

A new ignition module must be installed if no ignition spark is obtained (after checking that wiring and stop switch are in good condition).
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Offline 660magnum

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With the old points type ignitions here are some typical parameters . . .  This is for an old Stihl 010

Condenser value .17 uf

Coil primary resistance .8 -1.3 ohms
coil secondary resistance 7.2K - 8.8K ohms

Point gap .012" - .016"

23 - 24 degress BTDC

Spark plug gap .020" - .025"

Coil to flywheel gap is the thickness of an appointment or plain business card - about .010"

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Offline gregh

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I have a home lite brush utter xl, that has a magneto and points as a peice part, and it won't fire. I set the points to .015 and still won't fire.


Mower Tech small engine repair
Joplin, mo

 

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