Cooking up an Enya .15

Thanks, The one I cleaned had great compression but both were stuck solid, a little heat loosened up the first one, the second I haven't touched yet.

Yes, the only parts boiled in anti freeze were the case and the head. The rest were cleaned with Simple Green and alcohol, no way I could have left them as is. All parts get a spray with RemOil and a blow dry. I reassemble with after run oil on all moving parts.

I do have just one NIB Enya plug left, medium I think. I will try that but it's still a mystery to me why I couldn't even get a pop out of it. I had even tried a plug out of another running Enya to no happiness.

Bob

Is it possible that it's a clockwise running engine? If they came as a pair, maybe they were intended to be run in a twin with counter-rotating props. I know Enya sold them like this more recently.

I'm glad to hear that you didn't cook the vital parts...

If you prime the side of the piston it should fire right up, there is no need to even attach a tank at first. Once you get a feel for the engine you can attach the tank too.

I don't think the .15 engines came with left hand cranks, you can simply rotate the front 90° to have them running in the other direction. Another thing to check for is the liner alignment, somehow people manage to screw this up. I guess now that you've had it apart it will be assembled correctly too. If there is sufficient compression and a glowing glowplug they will always fire off a prime on the piston.

Don't speak to soon Kris.  The worst one was so stuck that I was afraid I would break something if I tried to free it so I dumped the whole thing intact into the cooker.  I let it boil for about two hours and it came right apart with little effort.



The other one sparkled compared to this.  But it cleaned up well.







Notice the difference in the needle valves.  The length and taper of the needle itself is not the same.  They advertize these sometimes to fit the .09, .15 and .19.  But the shorter one most resembles the NV on my original .15 bought new many years ago.  



But yes,  You must align the exhaust port perfectly before you tighten down the head as it's a friction fit, also ensure that the pistons baffle is on the side opposite the exhaust port.  There is a sequence in putting these back together.

But the good news is, the one I did yesterday runs fantastic.  Go figure, everything is the same, same fuel, same glow plug, same needle, same setting.  The only things I changed were the positions of the spray nozzle and the bleed air.





It covers the whole range too, from full throttle to idle with no lag.  Perfect idle tick over with no idle bar on the glow plug.  From no run to perfect run.  I'm happy with this one.

I will run the worst condition one tomorrow. No reason why it shouldn't, it ran well yesterday before I disassembled it, but we shall see.

Bob

Oldenginerod wrote:Is it possible that it's a clockwise running engine?  If they came as a pair, maybe they were intended to be run in a twin with counter-rotating props.  I know Enya sold them like this more recently.

Hi Rod, They came together, but not as a pair. That would be great though for my proposed P-38.



New Enya's came packed within that clear box in a yellow foam that just fell apart over the years and corroded and stuck to that side of the engine, that's what happened to these. It happened to several of mine years ago.

Bob

Got my "new" .09 with missing head screw in the mail today. It's all there except the screw and glow plug, and the needle and clicker spring look different to my other Enyas, but seems to be a correct fit. It still has the venturi restrictor.
I wasn't quite so lucky this time with my glycol cook-up. There are several black stains on the head and case which didn't shift. Also gave it a scrub with a brass wire brush but still black.
The good news is that the hole for the missing screw still has its thread. It was advertised as having poor compression, but with the head removed (until I find my spare screws) and my thumb over the cylinder I can't detect any leak past the piston. I like to lap the head to the liner on these, so once I find 4 good head screws I'll lap it in and see what the comp is like.
I'm looking forward to reviving another old Enya and hope to fire it up in the next few days.

Rod.

rsv1cox wrote:Notice the difference in the needle valves.  The length and taper of the needle itself is not the same.  They advertize these sometimes to fit the .09, .15 and .19.  But the shorter one most resembles the NV on my original .15 bought new many years ago.
 

All of my throttled Enyas have the short needle and the CL ones have long (spring) needles. Of course that may have changed over the years.

 You must align the exhaust port perfectly before you tighten down the head as it's a friction fit, also ensure that the pistons baffle is on the side opposite the exhaust port.  There is a sequence in putting these back together...

I once got a great deal on a CL Enya .15-III because the previous owner had installed the cylinder and head backwards.

BTW, I believe your Enya WILL run clockwise if you turn the front housing 90 degrees so the crankshaft port is open when the piston goes up while the engine turns clockwise. Have not tried it, read it years ago.  

George

Thanks George. Throttled solid short, control line springed. Makes sense, but looking at the picture above, the springed NV came with the two throttled engines in the box. My known original throttled .15 hovever does have the short NV. I will have to be aware of that.

I will have to try that 90 degree experiment.

I just bought a gallon of SIG 5% nitro all castor to run in these Enya's, etc. Just found a cheap Enya 40 CX and have a 40SS coming. I may build some of my old R/C kits yet.

Bob