Saito 300 nitro twin - Page 2 - RCCanada - Canada Radio Controlled Hobby Forum
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Old 02-19-2016, 08:16 AM   #11
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Re: Saito 300 nitro twin

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Glow plugs come in various heat ranges. Try different four stroke plugs and switch to a fuel with more nitro. The fuel might be old. Like they said get the idle mixture right.

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Old 02-19-2016, 10:28 AM   #12
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Re: Saito 300 nitro twin

I have the dual carb unit

I run a McDaniel glow igniter with 3 setting on a triple switch on my transmitter
1- always off
2- on at 1/3 throttle and less
3- always on

1- is used on the ground engine not running or priming
2- engine starting and inflight
3- if you lose a cylinder in flight you flip the switch to always on.

I use OS four stroke glow (FS) plug and 15% 2 stroke nitro fuel mostly Cool Power

It is hard to adjust at the beginning but once it is adjusted you never have to touch it.

A laser digital thermometer is nice to have to adjust the needles setting and to troubleshoot witch cylinder is turning off

Last edited by Skybolt; 02-19-2016 at 10:34 AM.
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Old 02-19-2016, 11:59 AM   #13
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Re: Saito 300 nitro twin

Originally Posted by hitechflyer View Post
The small nitros don't need as much fuel, so they can run fine with venturi suction alone. The bigger motors need a lot more fuel.
My first used Saito 180 I bought had the steel header with the aluminum style long muffler. Well those of us that know what happens when you heat steel and aluminum can guess what happened. I didn't lose the muffler because I doubled the vent line so it didn't fall off the header. But the threads were damaged on the muffler when I landed. Not wanting to give up flying for the day I opened the high speed needle about another full turn and flew with no exhaust pressure. The motor ran fine. I've done the same on my Saito 125 and my 115. 4-Strokes have very good fuel draw. I've ran straight headers on my Saito 4-Strokes at various times with no problems. They sound sweet with just a header. Cheers Floyd
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Old 02-19-2016, 02:07 PM   #14
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Re: Saito 300 nitro twin

You should have just about the right amount of info to drive yourself crazy now Al.
When you solve the issue, it's whiskey time!

''engine hoarder''
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Old 02-19-2016, 02:38 PM   #15
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Re: Saito 300 nitro twin

YUP, at least now I have something to start on. I have an UGLY Stick, about the same size as the AMR, all it needs is finishing and covering. That will be the test bed. I am not too sure if I want to put it in a nice plane and have the same problem.. It seems to be a fuel draw problem, otherwise it would not consistently lose the one cylinder. But, we will see. Thanks for all the help, if I ever get it figured out, I will post the answer that I come up with . Again, thanks fir the suggestions. I don't give up to easy. LOL........ Al
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Old 02-19-2016, 04:18 PM   #16
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Re: Saito 300 nitro twin

You got it right AL, it's a fuel draw problem, I found its hard to make it too rich without a Perry pump!
MAAC # 51283
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