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O.S. .91 Surpass Question

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Old 03-14-2002, 12:29 AM
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BCJETJOCK
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Default O.S. .91 Surpass Question

I just purchased my first 4-Stroke an O.S. .91 Surpass.I was wondering what the fitting under the engine(opposite the push rod tubes) is for? Would appreciate any help.

Brian
Old 03-14-2002, 12:43 AM
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bowanarrow
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Default O.S. .91 Surpass Question

If you are talking about the nipple coming out of the backplate, it is a crankcase breather. Handy for applying your after run oil. Don't put too long a piece of tubing on it to vent it out of the engine area. Keep it under 6" if possible.
Old 03-14-2002, 12:48 AM
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Default O.S. .91 Surpass Question

It is a tubing nipple,but it comes out of the bottom of the crankcase.I thought it might be a vent for the crank.
Old 03-15-2002, 11:11 AM
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jaka
 
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Default O.S. .91 Surpass Question

Hello!
Yes! That is the tubing for venting the crankcase!

Regards!
Jan K
Sweden
Old 03-15-2002, 12:14 PM
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CookieFace
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Default O.S. .91 Surpass Question

I have a OS .91 also. I use that vent for pressure for my smoke tank. Should I be doing that?
I bought this engine used and need to find a manual for it.
Old 03-18-2002, 09:24 AM
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jaka
 
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Default O.S. .91 Surpass Question

hello!
The nipple on fourstrokes is just venting the crankcase from oil,not doing any pressure!

It vill not pressurize the tank!!

Regards!
Jan K
Sweden

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