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US 41 engine manual

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Old 06-16-2012, 01:19 AM
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94ultra
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Default US 41 engine manual

I am trying to locate a pdf of the manual for the US41 gas engine, I have searched a couple of time with no success, does anyone have a copy of the manual in pdf or know of a link??
Thanks in advance
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Old 06-16-2012, 01:42 AM
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I think I still have a copy of my Quadra manual somewhere in my files. I have both engines and the Quadra manual is good for both. Send me a PM and I will send it back. Meanwhile, I see if I can find it.

Bedford
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Old 06-16-2012, 01:24 PM
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Default RE: US 41 engine manual

theres one in the quadra aerow engine forum. if you read the pdf they say run 20:1 gas to oil ?
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Old 06-16-2012, 02:35 PM
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Default RE: US 41 engine manual

Quadra manual

http://www.dieselrc.com/download/aerrow_quadra.pdf
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Old 06-16-2012, 03:33 PM
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Default RE: US 41 engine manual


Quote:
ORIGINAL: WhiteRook

theres one in the quadra aerow engine forum. if you read the pdf they say run 20:1 gas to oil ?
My guess is that's due to the oil commonly available at the time? Today's oils allow 40 and 50:1 to be much more common.
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Old 06-16-2012, 04:29 PM
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Default RE: US 41 engine manual

probly true . the oils might be better now. I just bought a Q100B used and , do you know what size the threaded holes
are on the mount ? there are 2 non threaded that are mabey 5mm and 2 threaded .

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Old 06-16-2012, 06:41 PM
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Default RE: US 41 engine manual

Can anyone tell me what kit number for the walbro carb. is? I have an older engine (US41) that is new, but would like to replace the kit with one that is compatable with gas mixed with ethanol. Read on an older post that the carb. number should be near the fuel nipple, but did not see one. Thank's in advance for any help!
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Old 06-19-2012, 11:38 PM
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94ultra
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Default RE: US 41 engine manual

Thanks for the qutra manual, I forgot the mixture and thought I was using 40:1 but the manual saying 20:1 for regular 30wt oil, I guess 40:1 should be OK if I run amsoil??
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Old 06-20-2012, 03:05 AM
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Default RE: US 41 engine manual

94,

You open a mammouth subject asking about oil. Stand by. I ran mine on off-the-shelf air cooled engine oil (WalMart or elsewhere) at about 32:1. After a while I converted to Amsoil synthetic at 100:1. There has been MANY negative things said about this Amsoil on these pages, but it has worked for me. DO NOT take the Amsoil intended for 100:1 and think you can get away with working it at 50:1. That is not a viable solution. I think Amsoil says you should not go stronger than about 80:1. They have other mixes for stronger ratios.

This engine will respond to most any oil ratio you give it so long as you follow the oil manufacturer's directions, and avoid water-cooled outboard motor oil.

That is just me.

Bedford
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