one.man.band
ArboristSite Guru
just lost 10 minutes of slow typing somehow, hate it when that happens!
50:1 is what manufacturer recommends for my saw. Works for me. Starts up after a few pulls, idles well, plug color fine, changed plug once in the last 5 years (didn't need to, but did anyway), cuts wood. See no reason to change.
Folks here run everything from 16:1 to 100:1. Those folks who run at the extreme limits know how to tune their saws, and have good results, and see no reason to change.
Folks who soup up saws have had their fingers in hundreds/thousands of saws, know what ratios their saws like, and most definitely know how to tune, no question. Folks who own those types of saws are experienced tuners as well. They want the most out of their saws, and tune accordingly.
50:1 is 2% oil/gas mix. For every 1% change, it roughly equates to about 1 jet size. Most 2 stroke carbs have jets that come in 1% size increments that i have come across anyway. Saws however, have adjustment screws. Suggest small tuning adjustments are necessary if increasing oil ratio to 2.5% or decreasing to 1.5%. Will the saw blow up if you don't retune? Probably not. Will it run better after retuning? Certainly. For a 1% change or more either way, it would be necessary to re-tune properly IMO to avoid potential engine problems.
Changing ratios without retuning is not the best idea. There is great tuning advice threads found elsewhere on this site from folks who definitely know their stuff. Mix ratio charts are available as well.
50:1 is what manufacturer recommends for my saw. Works for me. Starts up after a few pulls, idles well, plug color fine, changed plug once in the last 5 years (didn't need to, but did anyway), cuts wood. See no reason to change.
Folks here run everything from 16:1 to 100:1. Those folks who run at the extreme limits know how to tune their saws, and have good results, and see no reason to change.
Folks who soup up saws have had their fingers in hundreds/thousands of saws, know what ratios their saws like, and most definitely know how to tune, no question. Folks who own those types of saws are experienced tuners as well. They want the most out of their saws, and tune accordingly.
50:1 is 2% oil/gas mix. For every 1% change, it roughly equates to about 1 jet size. Most 2 stroke carbs have jets that come in 1% size increments that i have come across anyway. Saws however, have adjustment screws. Suggest small tuning adjustments are necessary if increasing oil ratio to 2.5% or decreasing to 1.5%. Will the saw blow up if you don't retune? Probably not. Will it run better after retuning? Certainly. For a 1% change or more either way, it would be necessary to re-tune properly IMO to avoid potential engine problems.
Changing ratios without retuning is not the best idea. There is great tuning advice threads found elsewhere on this site from folks who definitely know their stuff. Mix ratio charts are available as well.