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Author Topic: Evo woe  (Read 887 times)

Offline Ralph Wenzel (d)

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Evo woe
« on: October 06, 2008, 05:31:02 AM »
           
OK - - Fuel, Compression, Air, Spark (or Orange Glow) and Luck - - What am I missing here?
New Evo .36, w/MAX R/C non-remote NVA (small venturi)
Fresh Powermaster 10-22 (works fine on 3 other newish engines)
Pretty orange glow from plug
10-5 Rev-Up prop

No start. Heck! Not even a "bump" when turning it over. And I've tried everything from practically "dry" to having fuel spatter up from venturi.

Thoughts? Ideas? Incantations???

Ralph
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Ralph Wenzel
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Offline Jim Oliver

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Re: Evo woe
« Reply #1 on: October 06, 2008, 05:38:25 AM »
Ralph,
You might try a small squirt of prime directly into the exhaust port----------if that doesn't work, I would change plugs.

Cheers,
Jim
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Jim Oliver
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Offline Paul Smith

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The five elements of engine starting,,,
« Reply #2 on: October 06, 2008, 05:52:49 AM »
You left out the 5th element of engine starting,,,what's missing?

1. Compression
2. Ignition
3. Oxygen
4. Fuel
5. ROTATION.

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Paul Smith

Offline Ralph Wenzel (d)

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Re: The five elements of engine starting,,,
« Reply #3 on: October 06, 2008, 07:05:29 AM »
Quote from: ama21835 on October 06, 2008, 05:52:49 AM
You left out the 5th element of engine starting,,,what's missing?

1. Compression
2. Ignition
3. Oxygen
4. Fuel
5. ROTATION.



Well, I touched on that last one in paragraph 2 . . .  "turning it over" - No?

Ralph
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Ralph Wenzel
AMA 495785 League City, TX

Offline Paul Smith

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Re: Evo woe
« Reply #4 on: October 06, 2008, 08:14:23 AM »
I remember the old "5 key elements" from USAF engine school.  They're equally true for both piston and turbine engines.

The speed of rotation is critical.  Basically, the faster the better.  Often, flipping harder and faster is what's needed (assuming 1-4 are in place).

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Paul Smith

Offline Dennis Vander Kuur

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Re: Evo woe
« Reply #5 on: October 06, 2008, 09:57:39 AM »
Ralph,
If you have good compression when turning the engine over, squirt a prime directly into the exhaust port, attach the glow driver battery, grab the prop and then turn it over slowly. If you do not get a "bump" doing this then there is something major wrong with your glow plug and/or battery setup. The glow plug element should glow BRIGHT orange with the battery connected. Good luck.
DennisV
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Offline don Burke

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Re: Evo woe
« Reply #6 on: October 06, 2008, 10:51:56 AM »
As the old motorcycle mechanic said, "If it's got spark and it's got fuel it HAS to run".  One or the other ain't getting it!
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don Burke AMA 843
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Offline Balsa Butcher

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Re: Evo woe
« Reply #7 on: October 06, 2008, 11:02:46 AM »
No solid answers but if it were my engine I'd:
1. Go back to the original remote needle valve - a known.  After a few runs try the modified set-up again
2. Try a small squirt of lighter fluid in the venturi.  This often works under cold or humid conditions.
3. Switch to an 11-4 prop for more flywheel effect.
4. Consider a using a starter for the first few starts.  This will allow you to determing if the engine just needs more RPM to start.  CAUTION: If the engine is fuel locked up you can damage the rod by over enthusiastic use of a starter.
5. Try a reverse "bump" or "slap"  start rather than a "flip". Sometimes this works if the engine is flooded.

I found mine flooded real easily at first.  This tendency is true of many engines  prior to break in and is one reason why bench running is so important.  Sometimes excess fuel gets down into the crankcase.  Just back flipping won't necessarily clear it and it will exhibit  the symptoms you describe.  The engine must be turned on its side, and prop moved but not forced to get it to clear. Using a starter to rotate the prop under this hydraulic lock-up condition can damage the engine (see item #4 above).
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Dave Adamisin

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Re: Evo woe
« Reply #8 on: October 06, 2008, 03:17:27 PM »
Quote from: Ralph Wenzel on October 06, 2008, 05:31:02 AM
           
OK - - Fuel, Compression, Air, Spark (or Orange Glow) and Luck - - What am I missing here?
New Evo .36, w/MAX R/C non-remote NVA (small venturi)
Fresh Powermaster 10-22 (works fine on 3 other newish engines)
Pretty orange glow from plug
10-5 Rev-Up prop

No start. Heck! Not even a "bump" when turning it over. And I've tried everything from practically "dry" to having fuel spatter up from venturi.

Thoughts? Ideas? Incantations???

Ralph
Was it cold? (below 45 deg). All of this is possible if the engine was cold.
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Offline john e. holliday

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Re: Evo woe
« Reply #9 on: October 07, 2008, 08:34:11 AM »
I couldn't get mine to fire/start until I removed the muffler.  Then it was one or two flip starts.  Need to get more runs on it in the air as it never even showed a tendency of getting tight/hot.  My break in is with Top Flite 9-5, Sig 10% and Sig #003 plug.  The plug that came with the engine went with first pop.  DOC Holliday
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John E. "DOC" Holliday
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Offline Jim Oliver

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Re: Evo woe
« Reply #10 on: October 08, 2008, 09:38:27 PM »
Ralph,

What's the latest on the Evo???

Jim
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Jim Oliver
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Offline jim welch

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Re: Evo woe
« Reply #11 on: October 09, 2008, 05:26:09 AM »
Yeah....inquiring minds want to know?Anything we can do to help?  Jim....
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Offline Douglas Ames

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Re: Evo woe
« Reply #12 on: October 09, 2008, 12:28:37 PM »
CHECK YOUR GLOW PLUG VOLTAGE.
Should be Bright Orange as stated above in another response.

Also check your head bolts for tightness.
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