How many of you guys adjust your mixture/needles by plug color.?
Because of idle time, most guys on here go off sound and tacHmm, many of the other 2 stroke motor sports use it extensively, wonder why more don’t apply it to saws.
I would think it more accurate than sound. Reading plugs works for cars and motorcycles. Both 2 stroke and 4. With fresh plugs.
I've done a lot of evaluating engine tuning by plug color and i always felt like it was useful to verify your tuning was "in the ball park" when you were able to run something for several hours and verify a nice light brown plug color. Dark brown or black on your snowmobile after several miles and you could safely drop a main jet size and see if it lightens up a little.
I haven't done as much saw tuning, but I like to get them about as rich as possible without them running dirty and lazy. Based on my reading on this forum I'm going to retune my saws using the "4 stroking" method at WOT with no load, and then clean up in the cut. This seems to be a reliable method on a saw, and you can get an immediate gauge on your mixture versus having to run it a while and read a plug.
For sure though, a white or very light gray plug, especially with any metal speckle, and you are way too lean.
If working with a rev limited coil just tune in the wood. Hard to go wrong with that method.Has anybody looked at the color of auto tune plugs? they run just about white.
I no longer want to see any brown on my plugs, light grey works fine for me & I have not burned up a saw yet, course I use Scheaffers 9000 At 40-1 and do not use a dull chain or bog a saw down.
You can't go by four strokeing at wot with a rev limited coil either.
Just get Yee an autotune saw, you'll see it every time you pull the plug.Maybe my thinking is a little "old school" but I'd never want to see plugs running white in a 2-stroke.
Just get Yee an autotune saw, you'll see it every time you pull the plug.
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