Saito 56 probs
 

Hi all ,my engine just run at idle and when I try to speed up the engine die.

I changed the glow plug for a new OS F and I tried a tank to the outside of the aircraft and I have always the same problem.

I removed the main needle and pumping gas into the carburetor inlet to remove dirt and no change.

W can I do ??

RE: Saito 56 probs
 

open the low needle some

RE: Saito 56 probs
 

I would like to understand why opening the low end will resolve the problem ?

RE: Saito 56 probs
 

You don't understand that you don't question W8YE. You just do it and it works. :D

Sincerely,

SPACEWORM

RE: Saito 56 probs
 

Some turns? 1 , 2 3, turns

RE: Saito 56 probs
 

Just 1/4 turn

RE: Saito 56 probs
 

Rarely do I miss the occasion to become more knowledgeable and you ?

RE: Saito 56 probs
 

It is because the condition you describe indicates a lean mixture at idle, that is when you open the throttle and engine just dies. If you were to open the throttle and the engine sputters, stumbles, and smokes it would indicate a too rich mixture.

RE: Saito 56 probs
 

No, next to W8YE and a zillion other resident experts on RCU, I know it all already. However, I thought I was wrong once, but, I was wrong about that also. Actually I do consider W8YE to be the expert and I was complimenting him, not disparaging you. My apoligies to you.:D

RE: Saito 56 probs
 

Tig, one more little jewel, when the low speed needle is too lean it causes the high speed needle to be vague or even ineffective. In this shot of a Saito carb the "catseye" slot is where the fuel flows into the airstream, the sleeve that slides in and out over the spraybar is the " low speed needle", when the low speed needle covers up too much of the catseye you get the condition you've described.

RE: Saito 56 probs
 

Here is great reading on tuning Saito engines (begin at post #9) http://www.rcuniverse.com/forum/m_5843055/tm.htm

RE: Saito 56 probs
 

Go to http://saito-engines.info. Tons of information on Saito engines including how to tune them.

Cheers,

Chip

RE: Saito 56 probs
 

1 day before the engine was running very nice with this setting, and the day after, this problem come without touching nothing

RE: Saito 56 probs
 

That can happen if a piece of debris in the fuel clogs the passages in the spraybar. Do you use a fuel filter?

RE: Saito 56 probs
 

I use a filter in my gaz can but this plane was in storage somes years