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MAGNUM 91 FOUR STROKE INVERTED?

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Old 11-08-2005, 04:43 PM
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EF
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Default MAGNUM 91 FOUR STROKE INVERTED?

Has anyone experienced problems running this engine inverted ?
I intend installing it in a SIG 1/4 scale clipped wing Cub because if I side mount it, the tank is a little too low and I also want to preserve scale appereance as much as possible.
Should I use onboard glow drive ?
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Old 11-08-2005, 04:50 PM
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Default RE: MAGNUM 91 FOUR STROKE INVERTED?

I run a Magnum 120 4 stroke inverted without onboard glow with no problems. Seems like you are already aware of the importance of having the fuel tank at the correct height relative to the carb; see the instructions that come with the engine for the correct placement of the tank. Good luck.
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Old 11-09-2005, 06:21 AM
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Default RE: MAGNUM 91 FOUR STROKE INVERTED?

A friend has his Magnum 91 mounted inverted in his GP Cub 60, without onboard glow. He flew it all Summer without any problems.
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Old 11-09-2005, 11:50 AM
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Default RE: MAGNUM 91 FOUR STROKE INVERTED?

if you are really worried about inverted wich sometimes smaller displacemnet engines can have an effect called valvle lock were all the oil seperated by the fuel would run toward the valves someone at my hs told me about that. so im not quite sure
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