Is anyone down under running the new Saito FG-21? Just ordered one and am trying to discover how well they run. Thanks.

Shouldn't you find out before you order?

+1 if it sucked as bad as my fg20 I wouldn't waste any money

Redesigned carb and valve seats, hopefully that did the trick.

Originally Posted by skypup

Redesigned carb and valve seats, hopefully that did the trick.

I have this engine broken in and am mounting in my spacewalker 120. I am impressed. Easy starts, good transition and idles and sounds really good.

Have any video?

Keep us posted on how it runs after some time.

Originally Posted by Bigugly

Have any video?

Keep us posted on how it runs after some time.

Excuse my sloppy appearance. I wanted to post soon after I took this vid. This was very early during break in.

fg 21 running (4 min 4 sec)

Sounds pretty good. What oil ratio are you running in it?

Originally Posted by Bigugly

Sounds pretty good. What oil ratio are you running in it?

By the sound of it........10% WD40, 12% Marvel Mystery oil, 10 % K1000,

Originally Posted by Bigugly

Sounds pretty good. What oil ratio are you running in it?

20:1...100% synthetic for break in and continuous operation per the manual. I'm using Horizon's Evo oil.

sounds nice although i cant see the point of bench running a motor just mount it in a plane start it run slight rich mixture and fly they run alot cooler in the air than on the ground I have do this with all motors 2 and 4 stroke nitro and gassers.

Originally Posted by BeverleyFlyer

sounds nice although i cant see the point of bench running a motor just mount it in a plane start it run slight rich mixture and fly they run alot cooler in the air than on the ground I have do this with all motors 2 and 4 stroke nitro and gassers.

It is highly recommended in the manual for 40 minutes. Engine is tight and prone to quitting in the very beginning until it loosens up a bit. They are most concerned about the following...quote:


"engine Break-in

Do not skip the engine break-in; you will risk
seizing the conrod to the crankshaft.
The break-in process required for all Saito engines
is designed to break-in the conrod to crankshaft
interface more than to seat the ring. The ring will
seat gradually over time and the engine will develop
more and more power. The conrod needs to be
treated correctly from the beginning."

Originally Posted by skypup

It is highly recommended in the manual for 40 minutes. Engine is tight and prone to quitting in the very beginning until it loosens up a bit. They are most concerned about the following...quote:


"engine Break-in

Do not skip the engine break-in; you will risk
seizing the conrod to the crankshaft.
The break-in process required for all Saito engines
is designed to break-in the conrod to crankshaft
interface more than to seat the ring. The ring will
seat gradually over time and the engine will develop
more and more power. The conrod needs to be
treated correctly from the beginning."

They all tell you to break in the engine on the ground I think it is just to stop peaple leaning out the motor too much too early resulting in engine damage.
If your fuel mix is rite and the engine has enough cooling and is not too lean there should be no reason why the engine will get damaged.
However bench running a motor you have less air flow over the motor we can somtimes result in the engine getting hot.
Hey though this is just my opinion as long as you have the right fuel mixture and right cooling you should be rite.
anyway looks like you have a nice motor there and i hope you have alot of fun with it.
regards Bill

Originally Posted by BeverleyFlyer

They all tell you to break in the engine on the ground I think it is just to stop peaple leaning out the motor too much too early resulting in engine damage.
If your fuel mix is rite and the engine has enough cooling and is not too lean there should be no reason why the engine will get damaged.
However bench running a motor you have less air flow over the motor we can somtimes result in the engine getting hot.
Hey though this is just my opinion as long as you have the right fuel mixture and right cooling you should be rite.
anyway looks like you have a nice motor there and i hope you have alot of fun with it.
regards Bill

This will be the test bed. Cowling still needs cut outs for cooling. Plane to fly without cowl until break in is complete.

Originally Posted by skypup

This will be the test bed. Cowling still needs cut outs for cooling. Plane to fly without cowl until break in is complete.

Nice plane the motor should go well in that