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1.00Lx Blowing plugs (MC-59)

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Old 11-22-2010, 04:33 PM
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Tr!pullCrown
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Default 1.00Lx Blowing plugs (MC-59)

I have a1.00 with the Lx upgrade. I recently purchased this motor and love it. However after losing my aluminum spinner due to a bolt breaking in mid flight (twice)I decided to switch to a plastic spinner, I am now blowing plugs like crazy. I odered a couple of shims from dub today hoping this will cure the problem. I am currently running a 12x6 right now it appears to be rich . Ive also blown plugs using an 11x7,10x8 and a 10x9. The fuel i am running is three quarters of 15% mix withone quarterof 30% byrons roto rage doped up with 2oz of racing castor oil.
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Old 11-22-2010, 09:17 PM
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Default RE: 1.00Lx Blowing plugs (MC-59)

Maybe the plastic spinner is out of balance. That will wipe out a glow plug quick.
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Old 01-03-2011, 06:14 AM
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Default RE: 1.00Lx Blowing plugs (MC-59)

The plastic spinner was causing vibration fuel foam almost certaintly.
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Old 01-03-2011, 08:14 AM
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Default RE: 1.00Lx Blowing plugs (MC-59)

maybe the prop is out of balance which is what was causing the spinner bolts to break?
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Old 01-07-2011, 10:59 AM
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Default RE: 1.00Lx Blowing plugs (MC-59)

Blowing plugs , 95% of the time, comes from one cause: a lean run.

Fuel foam will get a lean run or temperature spike rapidly. At the power/rpm/frequency/energy this engine puts out, the slightest out of balance will cause havoc. Also, some plastic spinners can distort in shape, causing even more mystery.

If the fuel tank is not 100% isolated from the airframe - instant fuel foam. May not even show up on the ground, and you might not even see the microbubbles. But with an engine unloaded in the air... the problem will become worse and results in a blown plug. Even if you set the engine rich on the ground, you will still have problems. Situation has to be corrected.

Step one is to fix the problem. Since the spinner change caused the problem - seems that is the primary answer. Install a good quality, balanced spinner and prop.

For additional protection to avoid any similar problem, use a bubble-free fuel system. Bubble-Jett fuel tank or a Tetra bubble-free tank. Air and fuel do not mix, no bubbles.

I hope this is helpful

Bob
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