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Saito 100

Old 12-18-2005, 11:27 PM
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Default Saito 100

I was tuning a fairly new Saito 100 today. It has had about one gallon of fuel run thru it. It was running good on the high end but was missing and making a "knocking" noise at idle. Is the low end too lean or too rich. It transitions good from idle to high speed.
Old 12-18-2005, 11:35 PM
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Default RE: Saito 100

Will it take the throttle when you advance it or does it stumble and finally go (rich) or does it just quit (lean)
Old 12-18-2005, 11:35 PM
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Default RE: Saito 100

knocking sound lean it still is in the process of breaking with less than a few gallons on her
Old 12-19-2005, 05:47 AM
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Default RE: Saito 100

It will if it is too lean or too rich so you have to judge by the way it it stumbles or quits. If it is too rich it will smoke and stumble but still accelerate but if lean it will quit instantly. My guess is that it's rich. If the LS needle is too lean the HS needle will have little effect on the way it runs.
Old 01-28-2006, 03:39 PM
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Default RE: Saito 100

My 100 makes a knocking sound on the high end. It transitions okay from idle but the RPM maxs out and makes a knocking sound. I am spinning a 3 bladed 14 X 7 and the RPM is about 9200. Do I need to lean the low end? Adjust the valve gaps maybe? It's a pretty new engine with about 2 gallons through her.
Old 01-28-2006, 04:02 PM
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Default RE: Saito 100

It seems like I recall hearing the noise you describe when breaking in a Saito and trying to get the idle speed too low before it was broken in sufficiently. I'm guessing your low end mixture is too fat, but as said above, adjust it for best transition and lowest idle, and that will tell you better than anything. After one gallon, it should be broken in though. Set idle speed for 2K, then dial in for best transition at leanes low speed mix setting.
Old 01-28-2006, 06:19 PM
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Default RE: Saito 100

A 3 blade 14-7 is too much prop for a 100. If it's knocking at high speed, it is too lean for the fuel you are using...

Enjoy,

Jim
Old 01-29-2006, 08:32 PM
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Default RE: Saito 100

I'm using 20/20 powermaster fuel. I have adjusted it like the manual said. I used the RPM gauge and adjusted it for about 300 RPM's below the Max RPM's. I was thinking about using a 3 blade 13 X7 or X6. I would use a 2 bladed prop but It's on a corsair and I paid alot of cash for the stupid prop nut and Tru turn spinner. A 2 blade prop is too thin for the prop nut to fit properly. I have heard many people use a 14 X7 and it works fine for them. It seems I can never get to a 2000 idle. It quits if I go below 2600.
Old 01-29-2006, 11:54 PM
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Default RE: Saito 100

i think a 14x7 3 bladed prop would be too much for this engine... i used to run a master airscrew 14x7 2-bladed prop on my saito 100 and it was just right, didnt bog the engine but didnt let it wind out too much. once i used it for a science project (hovercraft) and had to put a 3-bladed pusher on it either a 14x7 or a 15x6, it was WAY too much for the engine to pull
Old 01-30-2006, 12:19 AM
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Default RE: Saito 100

Normally a Saito 'bumps' at low revs when it's too rich. Don't forget they are supplied new from the factory with the low end set very rich indeed.

-David C.

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