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Old 05-11-2005 | 10:53 PM
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Flyboy Dave
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Joined: Mar 2002
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From: Pinon Hills, CA
Default RE: Mounting inverted


ORIGINAL: BShin

Is there anything special you need to do in order to run an engine inverted? I
have an old OS .25 FP that runs pretty good right side up, but doesn't seem
to want to run (or even start) when mounted upside down.
Your engine will run essentially the same inverted as it does right side up when
you get it set right. Keep in mind, with the carb down so low under the tank
flooding can happen, and even fuel siphoning. Is is harder to hand prime the
engine....as has been noted here.

The best way I have found to start in inverted engine is to fuel it, hook up the
glow, put your finger over the exhaust outlet, and hit it for one second with
the electric starter....the engine will start almost instantly.

FBD.