461 fixed jet swap

[cwballistics]

Anyone here ever switched the fixed jet to .70 after doing a muffler mod on a 461? If so, notice any difference?
Thanks

 

[slowcar281]

you shouldn’t have to change jet sizes just from a muffler mod. The h screw should only need opened up about an additional 1/8 turn or so.

The only time you really need to change jet sizes is if you 2+ turns out on the h screw. It helps bring it back to the more normal range of .75-1.25 turns out.

 

[cwballistics]

you shouldn’t have to change jet sizes just from a muffler mod. The h screw should only need opened up about an additional 1/8 turn or so.

The only time you really need to change jet sizes is if you 2+ turns out on the h screw. It helps bring it back to the more normal range of .75-1.25 turns out.

Thanks. That was what i was thinking after reading the only other post I could find concerning this, and It was about the 460. Somewhere else, someone suggested it specifically for the 461, so I wanted to make sure.

 

[huskihl]

Muff mods don’t usually require much of a tune change. The faster moving air through the venturi pulls more fuel through the nozzle. It’s just as likely having to tune leaner afterwards as it is to tune richer

 

[Evan]

Good info here.
Even on my piped saws i run screws near 1 turn.

Usually if im 2 turns something is wrong lije leakin crank seeals