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Welcome to Club SAITO !

Old 02-22-2006, 10:29 AM
  #1776  
William Robison
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John:

Hobbsy called it. All moving parts will wear to seat, and should always be reassembled in the same position.

Bill.
Old 02-22-2006, 05:37 PM
  #1777  
bldrums
 
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Default RE: Welcome to Club SAITO !

Some good news for those looking for the Saito 1.25 ( from Horizon) . I got a phone call today advising me that the Saito 1.25 B/O has arrived ( great customer service ) and being shipped out today!
Old 02-23-2006, 12:00 AM
  #1778  
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ORIGINAL: dakster1a

True story, I really felt like my 125 would be dominant, I will find a way to come out on top in some further testing. Next time we pull them out, we will experiment with some different props, and If I can get a hold of a scale, we can check some thrust numbers.
Dak, i have about 2 gallons thru my 125 now and it will turn my 16x6 at 9100 and pulls the scale at 13lbs 14oz, just something to compare to
Old 02-23-2006, 02:41 AM
  #1779  
Ernie Misner
 
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On my Saito 82, there is a hole between the front two cam housing bolts. I have noticed it on other Saitos also. Some oil does ooze from that hole. What is the hole's purpose?

Thanks,

Ernie
Old 02-23-2006, 05:24 AM
  #1780  
Jerry C
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Default RE: Welcome to Club SAITO !

Is there a carb stack that will fit the Saito 125
Jerry
Old 02-23-2006, 07:22 AM
  #1781  
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Default RE: Welcome to Club SAITO !

Bill,
A few posts back folks were talking about their older Saitos.
Some had air bleed carbs.
I can remember this type giving me fits on motors I have had in the past.
Would your technique of pulling the fuel line off at idle to determine rich or lean low speed setting be appropriate for this type of carb?
Thanks!
JLK
Old 02-23-2006, 09:08 AM
  #1782  
Hobbsy
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Jerry, a few days ago I called my LHS and tentatively ordered a stack if there is such a thing, I'll call today and find out. Bobby will know because he is a huge Saito enthusiast.
Old 02-23-2006, 09:14 AM
  #1783  
William Robison
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Ernie Misner:

...there is a hole between the front two cam housing bolts. What is the hole's purpose?
It is for the set screw that holds the axle of the cam shaft. It's OK to put a dab of RTV in the hole if you wish.
----------------------------------
Jerry C:

I think I remember W8YE saying the SAI50GK93 stack would fit the FA-125 also.

Jim, can you verify please?
----------------------------------
John:

Cutting the fuel supply at any throttle setting gives a quick and dirty mixture check with any type carb.

Bill.
Old 02-23-2006, 10:48 AM
  #1784  
thinano
 
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Bill,
Please, what is RTV ?

Thierry
Old 02-23-2006, 11:35 AM
  #1785  
w8ye
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Room Temperature vulcanizing

Its Silicone glue
Old 02-23-2006, 01:27 PM
  #1786  
Kmot
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Default RE: Welcome to Club SAITO !


ORIGINAL: thinano

Bill,
Please, what is RTV ?

Thierry
Read this Thierry:

http://www.vishay.com/brands/measure...tvsr/rtvsr.htm
Old 02-23-2006, 02:08 PM
  #1787  
William Robison
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Thierry:

RTV is a form of silicone rubber. Room Temperature Vulcanizing rubber comes usually in a tube for application as a sealer on an open item, to close a hole, or for use as a gasket in a joint. Available in many colors, one of the most common here is what we call "Blue Glue" for its color. RTV has a vinegar odor, from the acetic acid used to make it cure.

Differing from ordinary rubbers which require heat to cure, RTV as stated will cure (Vulcanize) at normal air temperatures.

The first I know of on the market was the GE "Silicone Seal,"Now there are too many brands to list.

HTH.

Bill.
Old 02-23-2006, 02:32 PM
  #1788  
Ernie Misner
 
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John, you don't pull the fuel line off, you merely pinch it shut with your fingers or needle nose pliers. This can be used to check the idle adjustment, or sometimes the top end. At idle, pinch the fuel line and the idle should barely speed up. If the engines dies immediately, the idle mixture is probably too lean. If the engine speeds up a lot, the mixture is too rich.

Ernie
Old 02-23-2006, 02:44 PM
  #1789  
thinano
 
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Thanks for your Informations !

Thierry
Old 02-23-2006, 02:47 PM
  #1790  
Ernie Misner
 
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I broke in my new 82 the other day, and had a lot of fun in the process. It fired right up and went without a hitch. I ran it on some 5% synth/castor fuel for an hour or so (cheap stuff) before switching to some 15%. I add a little extra castor directly to the fuel tank for the 1st tankful and as usual my breakin fuel has a little extra oil added to bring it up closer to 20% oil. The needles slowly got leaned out some and it ran flawlessly.

Adjusting the valves was easy and fun after learning from Bill to set them tight. They were close as set from the factory but a bit loose. I used the included little feeler gauge, but set them a little tight so there was drag on that guage. Then after pulling it out, there was just a hair of clearance which is what I was after. After the couple of hours of breakin, they both had loosened up a little, moreso on the exhaust. I reset them back to fairly tight (just enough clearance to feel) again and it is ready to go. Finally there is a method that makes sense, since the clearance doesn't dissapear or get tighter when they get up to temp like gasoline engines.

Ernie
Old 02-23-2006, 03:31 PM
  #1791  
Hobbsy
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Default RE: Welcome to Club SAITO !

Ernie, I was just thinking back to Clarence Lee's test of the Saito .82, he thought it would be a high revving small prop engine but it fooled him. It is quite a torquer as you'll find out. People mostly think a torquey engine must have a small bore and a long stroke, this just ain't so when you take into consideration that a short stroke engine of the same displacement has more piston surface area for the combustion pressure to push on. Valve timing has more to do with the torque characteristics than the bore and stroke relationship.
Old 02-23-2006, 07:08 PM
  #1792  
Jack211
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Bill, or anybody, yesterday the 82a started easily. Today it just didn't want to go, though it puffed a few times--and I let it turn over a long, long time. I don't give it much fuel, usually only four clicks up from bottom. I checked the plug, checked the fuel, the glo igniter... all okay.

Then I put about a half inch of lighter fluid directly into the fuel line ahead of the carb. It fired right off with the same, low throttle setting. I used so much fuel trying to start it that I flamed out after 9 minutes. All okay, though. I don't fear dead-stick landings. You always come down.

Now, do I hurt the engine when I use a bit of lighter fluid for starting?

Jack
Old 02-23-2006, 07:14 PM
  #1793  
w8ye
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No, your engine is not hurt with a lighter fluid prime.

Enjoy,

Jim
Old 02-23-2006, 08:49 PM
  #1794  
Jack211
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Thanks, Jim. That's good to hear.

J
Old 02-23-2006, 11:07 PM
  #1795  
jack r
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I have had my first Saito for almost a year now, Its an .82. My question is this. This engine is the messiest engine I ever had. There is fuel all over the bottom of the plane after flying. I did a post on this when I first started using it. The consensus back then was that it was spitting out of the carb between compression strokes. I put a velocity stack on it but it didnt make any difference. Same amount of fuel all over the fuse. Has anybody else had this problem?
Old 02-23-2006, 11:16 PM
  #1796  
solafein
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An exhaust extender took care of my messy Funtana.
Old 02-23-2006, 11:22 PM
  #1797  
Thunderchild
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Default RE: Welcome to Club SAITO !

Will

Thanks Will for the quick post of the updated notes,

Could you please advise from your experience the most suitable prop sizes for my beautiful stable of Saito engines:

65

82

91

120

and a 170R3?

My most often used engine is the 82. I have been running a 13 x 7 two blader on the 82 and also a 12 X 6 three blader, but with this prop, it sounds like iit is over-revving in flight.

The engine is currently installed in a VMar Arrow Tiger

Thunderchild
Old 02-23-2006, 11:32 PM
  #1798  
William Robison
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Jack r: (and others)

Yesterday I got my first "New" mid block intake stack from Horizon, SAI50GK93. It is about 1/3 shorter than the earlier ones I've gotten, therefore it should be about 1/3 less effective in containing the fuel spray. This makes the Bru-Line air filter even more necessary to keep the fuel in, and not on the firewall.

Also Jack, do check the crankcase vent, be sure it goes out the bottom and is not blocked.

Bill.

PS: jack r is now number 205. wr.
Old 02-24-2006, 01:02 PM
  #1799  
p.j
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Hi all. I am about to install velocity stacks on a couple of Saitos but I have one question I would like answered first. When you mount the stack to the carb one of the stacks mounting plates goes between the carb and the engine rear cover which in turn moves the intake manifold away from the cylinder a small amount . I am wondering if this would cause sealing problems at the o-ring seal for the top of the intake manifold now that it has less pressure squeezing it tight. Has anyone found this to be a problem ?

Thanks P.J
Old 02-24-2006, 01:04 PM
  #1800  
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Default RE: Welcome to Club SAITO !

No problem at all.

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