Author Topic: Enya .25 SS Question (Read 2939 times)

Joe Messinger · « **on:** January 08, 2008, 09:08:23 AM »

Hello,

Anyone here have some experience with an Enya .25 SS c/l engine? I have one installed in a Ringmaster. I used 10 % nitro, 11% syn. 11% castor fuel mix for the first few flights and it seemed to run fine for the duration of the tank supply which is 3 oz. Since then, it starts easily, runs well for two laps and then quits.

I have tested the tank for air leaks, replaced the fuel line cleaned the needle valve and checked it for alingment and dirt. The engine turns freely with good compression. Two laps and it's dead in the air.

Would a higher castor content help? Have I damaged the engine with the initial fuel mix?

Any advice would be appreciated.

Thanks,

Joe

L0U CRANE · « **Reply #1 on:** January 08, 2008, 02:44:29 PM »

Joe,

Not much to go on there...

Is the ENYA SS abc or iron piston/steel sleeve? If ABC, break-in should be no problem. Neither shuold the 10-11-11 fuel. Iron ENYA engines, traditionally, liked a fairly long break-in. ...and around 25% mostly castor (preferably all.) Did you break the engine in according to factory recommendations?

How are you running it? Low-2 with muffler pressure? 4/2 break mode? Any idea of launch RPM? Prop within the range in the instructions? Does it run the same flying right-side-up as inverted? ..or did it when it was running out the tank...

Was the engine noticeably VERY hot when it landed after shutting off?

Have you tried a different make or heat range glow plug? (Assuming all else is in good shape, a bad plug might still glow if you connect it while it's off the engine, but not have the stuff to keep things going...

Does the same fuel run well in other models?

This engine should be a fine match to a Ringmaster, so I hope - with a bit more info to consider - someone can help you get it going right.

tom hampshire · « **Reply #2 on:** January 08, 2008, 04:04:11 PM »

Hi Joe - Still more questions... Does it shut off abruptly (fuel flow shut off) or does it slowly lose RPM (overheating)? Try a run on the ground. If it shuts off, run it again and reach in and hold the tank firmly. If the run stabilizes, than vibration is causing fuel foaming. Like Lou, I apologize for seeming to give you the third degree. Its just that troubleshooting over the computer or phone is so difficult. Let us know. Tom H.

Willis Swindell · « **Reply #3 on:** January 08, 2008, 05:24:29 PM »

Hi Joe
Sounds like the piston and liner has seated and raised the compression. Add a gasket or two but first I would change the plug.
Willis

Joe Messinger · « **Reply #4 on:** January 08, 2008, 07:50:29 PM »

I'm afraid I don't have any factory information on the Enya .25. I bought it used from a friend and he didn't have any paperwork to go with it.

The engine is, probably, of mid 1980's vintage. It appears to be in good shape and hasn't had much use. Good compression with no visible damage.

ABC piston and sleeve. Factory muffler. I haven't tried muffler pressure as yet but will. As I mentioned in my first post, it ran fine on Brodak 10% nitro, 11/11% castor & synthetic oil for several flights. I ran it with a wet 2 stroke setting and it did not overheat.

The engine starts easily and sounds good on the ground. I haven't tried running out a full tank on the ground but I will do that. In the air, it sounds alright for about three laps then stops abruptly. The metal tank is a three oz. standard vent set up. I had an OS LA .25 on the plane with the same tank and no problems. Needed the OS for another plane, had the Enya on the shelf and made the swap.

I did try another glow plug (OS A-3) with the same results. Three laps and stop.

Funny thing is I have several Enya engines (.29s & .19) and all have exhibited similar characteristics. Ran well for awhile then problems. All the other (newer engines) I have seem to like the Brodak fuel. I know this is a hard one to figure out and I appreciate the interest all have shown in finding a cause/remedy for the trouble I'm having with this particular Enya .25.

I'll try some Fox 5% 29% castor fuel. Maybe that will make the thing "Straighten up and fly right."

Thanks again for your help.

Joe

Russell Shaffer · « **Reply #5 on:** January 09, 2008, 09:19:46 AM »

I had a similar problem with a stunt 35. It was a really great running engine, never touched the needle, then suddenly wouldn't run for more than a few laps. I finally took the needle apart and flushed out a few little pieces of dirt. It's fixed now.

Jimmy R. Jacobs · « **Reply #6 on:** January 09, 2008, 10:44:44 AM »

Sound a lot like a bad tank or air leak at back plate of engine . If you can put back on your LA 25 just for a test run. If it run out full tank ok then you know tank is steal good and it is in the engine. I have had the pick tube in the tank crack and had same problem . If that is it just replace tube and your good to go .

Jimmy

L0U CRANE · « **Reply #7 on:** January 09, 2008, 12:36:54 PM »

Jimmy,

GOOD point on the possibility of a cracked tube in the tank! Copper doesn't seem to do that, but most manufactured tanks use brass tubing. Brass DOES crack along its length sometimes, due to vibration and possibly also to the ingredients in the fuel. (Ever seen the green slime that forms in old tank tubes that haven't held fuel in a while? That's a chemical reaction...)

So, if a tube is split, Joe, replace it with copper! If you have to go into the tank to check, might as well replace them all with copper.

'Nother thought on your 25SS: if you have a muffler, have you run it muffler pressurized? Other than small chunks of grit floating around between tank and needle valve, I dunno.

Oh, and does it restart easily right after it has shut off in flight?

Joe Messinger · « **Reply #8 on:** January 09, 2008, 08:45:33 PM »

Thanks to everyone for the help with my Enya trouble. Good advice in all of your comments.

Soon as the weather warms up a bit (?) around here, I'll run this thing on the ground and try to figure it out from there. I hate to give up on this engine as it performs quite well when it does run correctly. I'll let you know what the problem was when (if) I can figure it out.

Regards,

Joe

Bootlegger · « **Reply #9 on:** January 10, 2008, 08:12:35 AM »

Can you install a "clunk" tank with copper tubing instead of the metal tank ? As the other fellows said brass will stress crack, but setting up a clunk tank with copper tubing just might give you some clues as to the problem...

Balsa Butcher · « **Reply #10 on:** January 10, 2008, 09:22:28 AM »

Still waiting to hear what size prop you are using. If it is a 10-6, probably too big for that engine. I had a similar situation trying to run a 10-6 on a .25fp. Hey, it has more power than a Fox .35, should work....wrong! Try a 9-6 or 9-5 if that is the case.

dennis lipsett · « **Reply #11 on:** January 10, 2008, 10:17:31 PM »

ABC piston and sleeve. Factory muffler. I haven't tried muffler pressure as yet but will. As I mentioned in my first post, it ran fine on Brodak 10% nitro, 11/11% castor & synthetic oil for several flights. I ran it with a wet 2 stroke setting and it did not overheat

Hi Joe,
The Enya SS25 is not an ABC, most Enya are not of that persuasion. The Fuel requirements are 20% oil either castor or quality synthetic, so your fuel is fine. Recommended prop is a 9/6 but you can use from a 9/4 to a 10/6 according to their instructions. Instructions call for a 1 hour break in at a rich setting and will require a further 2/3 hrs till max reliability and performance is achieved. Hot plug Enya 3/4 recommended.
I have a few of these beauties and it pays to break them in carefully, although I've never seen one ruined when rushed, but then it may only last 25 years instread of 50.
Best bet is to try all the fixes recommended and then fly the plane in with a slightly rich setting with climbs and dives to work the engine a little . Probably a little more time on it will be your biggest help.
Dennis

Joe Messinger · « **Reply #12 on:** January 11, 2008, 10:35:43 PM »

I haven't had a chance to check on my Enya .25 question in the last few days and now see there are some additional comments and quarries.

I am using a 9/5 APC prop.

I guessed at the ABC question. It was multiple choice. Never had much luck with those. . .

I have read that the "SS" Enyas are Schneurel (have no real idea how to spell that. Spell check doesn't know either.) Probably has nothing to do with the trouble anyway.

I will do my best to get the thing running right soon and will post my findings when/if I accomplish that.

Again, my thanks to everyone for their interest and help.

Regards,

Joe

Author Topic: Enya .25 SS Question (Read 2939 times)

Joe Messinger

Enya .25 SS Question

L0U CRANE

Re: Enya .25 SS Question

tom hampshire

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Willis Swindell

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Joe Messinger

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Russell Shaffer

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Jimmy R. Jacobs

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L0U CRANE

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Joe Messinger

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Bootlegger

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Balsa Butcher

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dennis lipsett

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Joe Messinger

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