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Saito 300T single carb

Old 04-27-2020, 12:33 PM
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MajCrash
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Default Saito 300T single carb

I have a saito 300T single carb and want to get rid of the airbleed carb by replacing with a 150 2 needle carb. Looks like its just re-index the mounting plate. Anyone else done this and is it worth the effort?
Why? engine has CH ignition and at top end seems to pulse as if not enough fuel, yet touch the needle and it dies instantly, turn needle out from top end 2.25 turns to over 4 with no difference in engine rpm. I don't understand air bleed carbs. What should I do?
Old 04-28-2020, 03:48 AM
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Hobbsy
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First, is the timing set at 30 degrees before top dead center, second, is the airbleed screw halfway across the inlet hole, normal setting is very near there. I use this degree wheel to set the timing, 28 btdc for gasoline and 30 btdc for glow. The airbleed is a trim and has very little authority and is immediately closed as the throttle increases above idle..


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Old 04-29-2020, 07:45 AM
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Hi MajCrash
That reminds me of the Saito 182TD
It pulses at high speeds and it has CDI.
only until I changed the weight in the tank that had too small holes.
mounted a weight with 3mm holes.
now the engine is running very well, it has air screws on the carburetor
Lars
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Old 04-29-2020, 05:58 PM
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the Wasp
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Hey Dave, with what these 2 say, I am wondering if a Perry pump will help, over the years I have seen a lot of posts whereby people say this pumps help on bigger engines. what do you say ?

Jim
Old 04-30-2020, 03:11 AM
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Hobbsy
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Jim, I'm not much of a Perry pump fan, the Cline regulator is the way to go for me, if I'm going for pump. Maj, needs to check a few things, first, make sure the air bleed screw is centered, it doesn't have any effect at full throttle. Second, make sure the spray bar slit is pointed dead center toward the engine. Third, make sure the valve lash has some clearance.
Old 04-30-2020, 06:54 AM
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Jesse Open
 
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Mailed my very last package via USPS today. Stood in line for over 1/2 hour , never again.
Wonder how many hours I spent at the P.O. last year on giveaways.
Old 05-02-2020, 02:40 AM
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Originally Posted by Jesse Open View Post
Mailed my very last package via USPS today. Stood in line for over 1/2 hour , never again.
Wonder how many hours I spent at the P.O. last year on giveaways.

A labor of to the recipients.

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