In-depth Ignition (Spark) Timing Tutorial!

[@marksarkaquariums9056]

Great video,you made checking advance look easy.I'm doing that to every saw I build from now on.

[@Loompius]

You know a lot about timing! One thing ive always wondered is why does a chainsaw have fixed timing while an outboard engine per say has spark advance? Both being 2 stroke engines.

[@VintageEngineRepairs]

Many ignition coils on the modern 2 strokes have ignition advance built in. Anything circa 2000’s onwards tended to have it! Outboards utilise rotating / advancing the ignition coil I believe? Ope use electronic controlled ignition advance.

[@patrickwhalen4781]

Great video. At 5:35, are you making the mark with your pen while you’re running the drill and timing light? Seem like it could be tricky to be exact.

[@VintageEngineRepairs]

You spin the engine and use the light, put a mark where you think it seems to be landing and then check again. Re mark it if necessary. That’s what I did here. Took two attempts to get it exact. First was a close estimate second was the exact position.

[@patrickwhalen4781]

For a saw like this, how would you advance or retard the timing? Can the coil be moved laterally for that purpose, similar a non electronic system like the stator plate on an 041 that rotates (and therefore rotates the coil)? I’m only familiar with the coil being able to be moved further from the flywheel magnets to increase the air gap.

[@VintageEngineRepairs]

No the stator plate cannot be moved. These ignitions are fixed, however if you wished to advance the timing a few degrees for better top end power then you shave the key slightly and turn the flywheel on the crankshaft stub.

[@14maros]

At the start, the ignition angle is also 26 - 28 ??

[@VintageEngineRepairs]

Yep, It’s fixed.

[@williamemerson1799]

Well alrighty then.

[@ronniebarker79]

Spot on in depth content skip

[@VintageEngineRepairs]

Thanks mate :)