i posted a latest thread about the carb sticken and you guys helped me through that and now it works great but i was wondering what the stock setting was for the os max carb...since i can't seem to find it on the web....thanks
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vbgagnon
RCTalk VIP
OS has about 300 carbs on the market. What engine did it come off of? If you had the model number that would help too.
HeartBreak
RCTalk VIP
Usually 3.5 turns on the high end, flush on the low is enough to get it started. However, as the hammer-man pointed out; the settings vary from carb to carb, and OS has a TON of them on the market.
HeartBreak
RCTalk VIP
Try flush on both needles - that should get you in the ballpark. As for the idle setting, about 1-1.5mm gap should get it started.
vbgagnon
RCTalk VIP
could that be an os rg x?
I have never heard of an os rx.
I have never heard of an os rx.
vbgagnon
RCTalk VIP
A google search came up with nothing. How old is it?
vbgagnon
RCTalk VIP
A google search came up with nothing. How old is it?
Well... I found an OS 21 RX-R engine at OS's site in the discontinued page:http://www.osengines.com/parts/xr23818000.html
No picture or anything.
It says the carb is a 20A which is also discontinued, but some of the parts appear to be interchangeable with the 20B according to tower: http://www2.towerhobbies.com/cgi-bin/wti0097p?MANUFACTURER=OSM&FVSEARCH=20A
Parts like the HSN, LSN, HSN body...
So, I checked OS's site again, found the manual for the 20A and 20B (same manual with info about both carbs, slightly different)
Manual
After reading the manual... it says the mixture needle (LSN) is set from factory... the "Needle Valve" (HSN) should be 2 1/2 turns (20A carburettor)
or 3 turns (20B carburettor) from the fully closed position.
Further reading tells you that if you totally "F" things up, that the LSN should be 1 turn in from flush (20B) and 3 turns from flush (20A).
Quote from manual:
"Its basic position can be found by first rotating the
Mixture Control Valve until its .slotted head is flush
with the carburettor body. The valve is then screwed
in exactly 1 turn (20B carburettor), or 3 turns (20A
carburettor), to establish its neutral position."
Is it just me, or is carburetor spelled funny? They have carburettor.
I hope this is your carb/engine... or I just totally wasted 20 minutes of my life.
No picture or anything.
It says the carb is a 20A which is also discontinued, but some of the parts appear to be interchangeable with the 20B according to tower: http://www2.towerhobbies.com/cgi-bin/wti0097p?MANUFACTURER=OSM&FVSEARCH=20A
Parts like the HSN, LSN, HSN body...
So, I checked OS's site again, found the manual for the 20A and 20B (same manual with info about both carbs, slightly different)
Manual
After reading the manual... it says the mixture needle (LSN) is set from factory... the "Needle Valve" (HSN) should be 2 1/2 turns (20A carburettor)
or 3 turns (20B carburettor) from the fully closed position.
Further reading tells you that if you totally "F" things up, that the LSN should be 1 turn in from flush (20B) and 3 turns from flush (20A).
Quote from manual:
"Its basic position can be found by first rotating the
Mixture Control Valve until its .slotted head is flush
with the carburettor body. The valve is then screwed
in exactly 1 turn (20B carburettor), or 3 turns (20A
carburettor), to establish its neutral position."
Is it just me, or is carburetor spelled funny? They have carburettor.
I hope this is your carb/engine... or I just totally wasted 20 minutes of my life.
Last edited:
- Thread starter
- #11
it seemed that the 20a carb setup worked and ran the best out of all the setups i tried.....and i think i got the neighbors a little mad running it 8:00 in the morning ....thanks you guys are such a great help....
To be sure, OS usually stamps the carb number just below the air intake opening (at least all the ones I've seen). May want to take a look and jot it down for future reference.