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Is this engine toast?

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Old 02-28-2006, 08:13 PM
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xray328
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Default Is this engine toast?

I got bored and ran my Enya .15 with a 8x6 prop on the bench (in a cold garage). It seeme to run fine but after 3 or 4 minutes it quit. So I started it again, no problem. Ran it again, it quit after a couple minutes, and noticed it was really hot. Ok, that was fun...so I put it away. But then I took it to the field today and it was really tough to turn. It would turn but there was noticable friction. So much in fact that the electric starter wouldn't turn it. I thought I had hydro lock but I could turn it over by hand. I took the glow plug off and although it did turn more freely, it was still harder to turn than it should of been. So then I shot some fuel into the carb and gave it a few spins but that didn't help. Any ideas guys? I was thinking I might have overheated the motor wth the 8x6 and done permanent damage.
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Old 02-28-2006, 09:27 PM
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Default RE: Is this engine toast?

That shouldn't have hurt an Enya permanently

Maybe its cold
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Old 02-28-2006, 11:32 PM
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xray328
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Default RE: Is this engine toast?

I guess thats possible. But it was 45 degrees today, much warmer than when I ran it with the 8x6. I had to push it through compression and then I had to keep pushing it to get it to turn. You know how usually once it passes compression it pops over? Well it doesn't. Its very stiff.
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Old 02-28-2006, 11:34 PM
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Default RE: Is this engine toast?

What should I do?
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Old 03-01-2006, 12:20 AM
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Default RE: Is this engine toast?

what was the mixture like when you ran it in the garage? disassemble the engine and see whats up first remove the head and see if you have any slag on top the piston then the back plate. ahhhh i'm sure you know how to take one apart i'm thinking perhaps a bearing went bad, or the mixture was to lean and it did fry
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Old 03-01-2006, 12:25 AM
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Default RE: Is this engine toast?

Is there any discoloration of the engine head?

This would be a BIG sign that the engine suffered serious over heating and has been damaged. If it doesn't show any signs - there are still no guarantees (there could be internal damage) but you have just eliminated one possibility.

Other questions - What sort of fuel did you use?
Was there lots of caster oil in it? (I hope so).
Is the engine gummed up with fuel residue? Have you flushed it out? Do you know how to flush out an engine?
Tuning? has anyone played with the settings? - Did they know what they were doing?

"The Devil is in the Details"
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Old 03-01-2006, 01:05 AM
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Default RE: Is this engine toast?

I was trying to lean it out a bit. It passed the pinch test though. I'm by no means a tuning expert. I know just enough to get myself in trouble. I was running Omega 15% at the time. Theres no apparent discoloration. Would pictures help?
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Old 04-23-2006, 08:35 AM
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MikeG4936
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Default RE: Is this engine toast?

X-ray.... if you keep using Omega 15%, it WILL be toast! Plain bearing/lapped iron piston Enya engines NEED extra castor. I use Omega 15% also, but I add 7 oz. of castor to the mix. BTW, an 8x6 is too much for this engine. An 8x4 will allow it to rev up, which is what you want. An 8x5 might be ok... but I'd stick with the 8x4.
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