Jet size increase

[junker]

My tecumseh has a oem carb main jet size of 191 and i was wondering what size i should increase to for more power and higher rpms and also it has the jet in the float bowl bolt. where can i get a bigger one?(with bigger size jet)

 

[Affair_driven]

Jet size alone does not determine rpm or power.

 

[EagleTalons]

Well it does determine the fuel into the engine, but with the added fuel you need added air.

 

[pmat]

jet size dosent matter, the right mixture does

 

[junker]

i know i need more air but what size jet should i increase to, to get more fuel so i can put more air into it

 

[Affair_driven]

Do a spark plug reading.
What color is center electrode insulator now?