Opti-2 claims "single mix", yet ratio varies depending on package size. WHY???

[slowcar281]

RTEK's do the same thing. I drill the jet out on them to the next size larger.

Are you drilling the pilot jet as well as the main jet?

I’ve had decent luck using the # 40 Suzuki pilot jet and the larger hole throttle plate in most of the duraforce mowers I’ve worked on. I haven’t had to enlarge a main jet yet.

 

[bwalker]

Are you drilling the pilot jet as well as the main jet?

I’ve had decent luck using the # 40 Suzuki pilot jet and the larger hole throttle plate in most of the duraforce mowers I’ve worked on. I haven’t had to enlarge a main jet yet.

Just the main, I also have ditched the plastic carb for a metal Proline one on some of the blowers.
Making the throttle plate hole bigger may be counter productive.

 

[slowcar281]

I’d love to see what metal carb you are talking about. Those plastic ones aren’t very good, and warp easily.