Os max 61 4 stroke.....help!! - Page 4 - RCCanada - Canada Radio Controlled Hobby Forum
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Old 09-22-2016, 07:06 PM   #31
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Re: Os max 61 4 stroke.....help!!


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A air bleed is just that , it in no way controls fuel . just adds air to the high speed needle setting up to 1/2 throttle . a controlled air leak . the problem is you can remove air but you cant add fuel at idle unless you open the high speed and then the high speed is messed up . funny I still have the os carb if anyone wants it . you could put it on your saito if you want it to run worse LOL . if you find a saito carb make sure you get the choke plate because I seem to remember the os choke not working on the saito carb?? cheers Roger
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Old 09-22-2016, 07:10 PM   #32
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Re: Os max 61 4 stroke.....help!!

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Originally Posted by williame3590 View Post
If there was no response when adjusting you have a severe air leak.

Bill
Bill I would think it's more likely the air bleed hole was plugged. it's just a tiny hole and they would get gummed up from the fuel in short order.
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Old 09-22-2016, 07:31 PM   #33
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Re: Os max 61 4 stroke.....help!!

I've never had the choke plate, Even on the os carb. Only on my gassers.
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Old 09-22-2016, 07:49 PM   #34
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Re: Os max 61 4 stroke.....help!!

None of my Saitos need a choke, and they stopped supplying them with their engines a while ago. Simply open the throttle a bit and they should start fine.
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Old 09-22-2016, 09:43 PM   #35
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Re: Os max 61 4 stroke.....help!!

well it was 25 years ago I was running my 61 fs, back then os had a little flapper for a choke and saito had a slide plate.. with no choke I found the best way to choke was put your finger over the muffler open the throttle and flip, once fuel runs from the exhaust flip it a couple more time with your finger off then close the throttle add glow ,all it should need is a little bounce backwards against compression ,will start first flip every time if cold . best to let 4 cycles get cold before a restart as a hot start on a 4 cycle is a real hassle .
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Old 09-22-2016, 09:44 PM   #36
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Re: Os max 61 4 stroke.....help!!

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Originally Posted by Cougar429 View Post
None of my Saitos need a choke, and they stopped supplying them with their engines a while ago. Simply open the throttle a bit and they should start fine.
I assume you must use a starter .
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Old 09-22-2016, 10:06 PM   #37
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Re: Os max 61 4 stroke.....help!!

they may have stopped making them but believe it or not I just found both choke systems in the basement LOL . the os flapper and the saito slide system if anyone is looking for one.
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