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Saito heat problem - 5/6/2008 9:05:52 PM   
davideboracay



Posts: 109
Joined: 10/2/2006
From: Luxembourg, LUXEMBOURG
Status: offline 		Hello,

I have a saito .82a engine in my Funtana X 50. I have about 10 tanks run through it using 8% nitro and 20% oil.
So far I have only ground tested it and it seems to get very hot. When I turn it off the muffler is steaming and smoking for about 45 seconds. Is this normal?
It is also very tricky to adjust the needle valves. It still stutters when advancing from idle to full rapidly.


Can anyone help please?

Thanks

< Message edited by davideboracay -- 5/6/2008 9:07:31 PM >

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Davide
       Post #: 1

RE: Saito heat problem - 5/6/2008 9:07:22 PM   
jaka


 

Posts: 4348
Joined: 12/11/2001
From: Upplands Vasby, SWEDEN
Status: offline 		Hi!
Heat is normal!
You should be adjusting the low speed needle!

_____________________________

Jan Karlsson Airracing products
MVVS, Motul "Micro" all synthetic oil

(in reply to davideboracay)
       Post #: 2

RE: Saito heat problem - 5/6/2008 9:08:45 PM   
davideboracay



Posts: 109
Joined: 10/2/2006
From: Luxembourg, LUXEMBOURG
Status: offline 		Here I am talking steaming hot!!
I can never seem to get the right low speed needle setting.

_____________________________

Davide

(in reply to jaka)
       Post #: 3

RE: Saito heat problem - 5/7/2008 12:44:40 AM   
w8ye



Posts: 17021
Joined: 12/11/2001
From: Taylortown, OH, USA
Status: offline 		The LS needle should be moved in very small increments.

Some people tend to move the needle too much at once and then the chase themselves and can never find the right setting.

_____________________________

Attended the CutFinger Institute of DirtNap University for years but never did graduate....

Club Saito Member #7
Original AMA #31261

(in reply to davideboracay)
       Post #: 4

RE: Saito heat problem - 5/7/2008 2:15:11 AM   
mike109



Posts: 101
Joined: 7/25/2004
From: DubboNew South Wales, AUSTRALIA
Status: offline 		G'day I have some eight Saitos and they all take a while to run in before you can get a stable low idle and good transition. I generally run them in according to the instructions then after three of four tanks, I fly them but with the high setting quite rich (at least half a turn and more). I then keep flying them until I notice that they will idle and transition better and at that stage I make small (1/8) turn adjustments to the low speed needle for a better idle and transition and then fly again. By the time they have run for about an hour, they are beginning to settle in. My 72 spent its first couple of flights in a Four Star 60 just plodding around blowing lots of smoke and not idling very well but it has since moved to a Kadet Senior and at first it would not idle slowly to allow me to land so I used to just kill the engine and float in. Now, about an hour later, I have adjusted the low needle and it just putters at a very low stable idle for nice easy landings and its transition

The moral of the story is to resist making lots of adjustments before it gets a chance to run in a bit. And don't expect full performance from a new engine. You won't get best throttle response until the engine has had at least an hour's running. I just put up with poor idle initially but it soon comes good. I use commercial 10% nitro fuel with 15% synthetic and 5 % castor. I had to strip an engine after a bad prang recently and was expecting to find some coke from the castor but the inside of the engine after about 2 hours running was completely clean.

The exhaust gas from a four stroke is hotter than a two stroke and as a result four stroke mufflers get pretty hot. Also, your engine will cool better in the air than sitting on the ground.

_____________________________

If it''s not right on the ground - it won''t get better in the air. Club Saito # 597

(in reply to w8ye)
       Post #: 5

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