Can't decide what manufacture to go with for a four stroke.
I have heard that both run and sound great, are easy to setup and maintain. I have also heard the following:

Saito

1) Leaks all kinds of oil and are messier than the OS
2) Uses way more fuel that comparable OS
3) Has more hp and less weight than comparable OS

Can anyone who has both confirm these rumours

I don't really care which manufacture is better as I will buy either, I would just like to know if the rumours are true.

Thanks

hancop, I own a few of each, and from my limited experience: #1 False (neither brand leak oil), #2 False (fuel consumption about the same), #3 Maybe (but only on paper, in the air, hard to tell the diference for similar sizes) I think you would be very happy with either brand.

My .02 says Saito. Weight to HP.

1) OS 4-strokes with pump do not leak oil, such as the OS 91 and OS 120 pumpers. These engines do not have crankcase vent.

2) Saito's fuel consumption rate is almost as bad as YS. I get 14 minutes at full throttle with an OS .91 on a 10 oz tank. I'm lucky if I get 12 minutes with a Saito .91. Likewise, the Saito 120, 150, and 180 all are thirsty engines. Do a search in the engine forum and you will see.

3) The OS 70 is stronger than the Saito 72 based on several magazine tests and real world experience. The OS 91 is also a very strong engine. Mine spins either a 14x6 or a 13.5x8 at 9600 rpm on 15% fuel:

Sounds to me like you have either not searched the many, many threads on OS vs Saitos or are trolling to start the OS vs Saito fight again... Both are fine and you can buy either with confidence, or you can get a YS or a Magnum, or an Enya, or....


quint

Well in my case before buying an O.S. will go with a Magnum
because it cost less and makes the same power,
and if less weight its needed up front a Saito
based on my experience

While both motors are very nice in either way. But, ive read many of posts on here that the Thunder Tiger 91 4s is a great motor. Less vibration at idle and will swing the same size prop as the saito 1.00. And of course cheaper. And cheaper is always good in my wallet.

In 3D flying the Saito 72 way out performs the OS 70 because you can use 30% helicopter fuel in the Saito and it responds well to it without any harm. YS engines benefit greatly from 20 to 30% fuel also.

On the subject of fuel consumption, keep in mind that more horsepower does not come for free. The laws of physics don't allow it.

Saitos tend to be lighter. 3D fliers are very weight sensitive people while scale war bird people don't seem to mind a little extra weight.

4-stroke engines have a crankcase vent which can be piped overboard with a piece of fuel tubing but I've never seen much of anything coming out of there anyway. Pumped 4-strokes like the YS are completely sealed and have no leakage unless something is wrong with them.

For displacement, the YS is the most powerful.

The only thing about this little debate I know for sure is Who cares about the minor fuel consumption difference anyway, if you do, get out of this hobby now.

Saito engines thrive on 20% nitro, gives great idle and transition.

The Saito .91 is probably the best bang for the buck when you take many factors into account. I know this is a bold statement but my testing of many engines confirms this.

Me? My opinion?

All I will say is that I have dumped all my OS four stroke engines, I now have nothing but Saito.

Bill.

I wish You had dumped them in my direction! Os, hard to beat the reliability factor in the air. Seen many a Saito crap out and deadstick.

I think both are about the same and it boils down to a Ford-Chevy type debate. Personally if I could only run one, it would be the Saito, but I have both type of engines and also a YS (though I haven't gotten a plane for yet), but I like them both. Saito would be a defining winner though if they came out with a pumped series. Magnum are good to, newer ones probably have more power than the older ones. Never tried Enya, but would like to...

I like my Magnum .91 FS...50.00 less than an OS and 100.00 less than a Saito.
This engine performs quite well,but I have a question...what are you guys using for an extention on the muffler,Im using some silicone hose and it melts off the muffler.[]

This thread should be in the Glow engine forum.

Saito engines do leak more oil near the cam gear. Saito engines do tend to weigh less and make the same or more power. The newer Saito engines tend to use more fuel to make their higher power. Saito engines will make higher rpm on higher nitro fuel.

The Saito 72 and the OS 70 are not in the same league. The OS 70 is more powerful but weighs as much as the Saito .91 and has almost as much usable power.

The new Saito .72 uses more fuel than a Saito .91 to fly the same plane (Funtana 40) and the .91 has much more power on lower nitro fuel.

The newest Saitos .72, .82, 1.00, 1.80 are more thurstly than the older designs and run best on higher nitro fuel.

All engines have their place.

"an extention on the muffler", the exhaust is too hot unless you get red high temp silicone tubing from JTEC. Even that may not work.

I like the sound of a Saito better than an OS.