02powerstroke
ArboristSite Lurker
Need help tuning carbs on my MS361 and 670 super. Do I need a tach? The 670 has a gutted muffler. Also we are running 50:1 I noticed people are runnin 40:1 around here should I be doing this?
New guy needs help tuning carbs MS361,670 super
- Thread starter 02powerstroke
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mtngun
Addicted to ArboristSite
Experienced sawyers like to tune by ear, but I think a tach is very helpful for the beginning tuner who has an uncalibrated ear.
Tuning instructions at the Madsen site.
50:1 is fine.
02powerstroke
ArboristSite Lurker
We got it tuned real good. but it keeps un adjusting its self. what would cause this? the screw rich ens its self up after about 30mins of cutting. That and I drilled two holes in the muffler housing and with the carb tuned it using a tank of fuel in about 20 mins lol that seems alittle much to me but. As my brother and law said " you cant have a dragster that gets the mpg of a pirius"
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mtngun
Addicted to ArboristSite
Glad it is running well.
The H screw is rattling out (richer) ? Hmmmm....... usually carb screws are spring loaded to dampen vibration and reduce the tendency to auto-rotate. Plus, usually carb screws have an o-ring seal that also provides friction to keep them from rattling out. I personally have never had that problem, so I dunno what to suggest.
The H screw is rattling out (richer) ? Hmmmm....... usually carb screws are spring loaded to dampen vibration and reduce the tendency to auto-rotate. Plus, usually carb screws have an o-ring seal that also provides friction to keep them from rattling out. I personally have never had that problem, so I dunno what to suggest.
