Solo

My Feedback: (63)

Hi, I have a new Saito 120 with about 30 minutes of break in so far. I have a PR0-Zinger 15X6 on it and my high RPM is at 10000 and the low at around 2600. What should the ideal high and low rpm be?

Thanks for your time

Hobbsy

My Feedback: (102)

A little leaning of the low speed screw will get you a 2,000 to 2,200 rpm idle, the 15x6 is a little light, a 15x8 would be better, 10,000 is a bit fast. You don't need to wear it out to get a good idle, but you will need to lean it and reduce the throttle opening at idle a little at a time as it continues to break in.

ooooo

Like hobbsy said. I also think 10000 is too much RPM for that engine. Use a 15 X 8 or a 16 X 6 prop for that engine. Lean out your LS needle for 2200 rpm then try for 1800 to 2000 rpm after 2 to 3 gallons of fuel. I'm using 15% Wildcat 2 & 4 stroke nitro.

cheers.

William Robison

My Feedback: (3)

Erich:

The 15x6 is definitely not enough prop for an FA-120, and if yours is the "S" version it's even more so.

On the standard 120 I like the 14x8 three blade prop, on he "S" engine it's a 15x8.

Running 10K rpm on the ground in itself says you don't have enough load on the engine.

A further note on the FA-120S - it will not idle as well as the older version, but you still should be able to get 2200 rpm reliably.

Bill.