Magnum 91 fs - RCCanada - Canada Radio Controlled Hobby Forum
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Old 05-19-2010, 09:54 PM   #1
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Magnum 91 fs

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I was wondering about the breather tubes on my Magnum 91 FS. I have one on the side of the crank case and one on the side of the intake. I am confused about the one on the side of the intake. I can find no reference in my manual I printed of the internet and I did not get a manual with the motor? Can some one fill me in please on what goes to what. I would asume that the one on the crank like the one on the crank case of my saito and run it outside the cowl and the one on the carb is for the oin coming fuel but what about the one half way up the intake tube?

I will try to take some pics of it tomorrow.

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Old 05-20-2010, 01:23 AM   #2
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Re: Magnum 91 fs

Use a bit of fuel line and connect the crankcase vent to the nipple on th intake. This way the excess oil is returned to the engine further lubricating the piston & rings, then is expelled through the exhaust. OS Alpha series accomplishes this same thing by having a small hole between the valve rocker area and th intake.
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