I picked up an old Veco .19 a while back. As far as I can tell, it has never run. It's got a baffle instead of a muffler, but unfortunately, the linkage to the throttle is missing. I've been told, that it isn't necessary to make the engine run, so I removed it to try to get the engine to run and break in.

The engine will fire and run at idle, but dies with almost any amount of throttle opening. After about 6 or 8 oz. of fuel through it, I managed to get it to run at about 1/3 throttle. To get it to run at even that setting, I've had to open the needle about 4 or 5 turns. It sounds rich, but with any application of throttle, it seems to lean out and die. I tried taking out the needle and blowing fuel through the carb. Everything seems clear.


Now a few questions...

1. Is the baffle necessary for the engine to run right?

2. Does this sound like simply a matter of breaking it in?

3. Do you have a picture, or drawing of the linkage to make the baffle work?

4. There seems to be several of these still available here as NIB pieces. Could someone please scan and post the instructions (at least the break in portion)?


Thanks for any help / advice.

Hello!

1. No the exhaust restriktor (Baffle?) is not necessary!

2. No this is not the way an engine should respond!
I'm 99% certain the the carb has "gunk" inside! Just take it apart and look for any dirt inside and clean it. Particularly the slot in the idle-disc should be checked...You have a perry carb haven't you (Black plastic carb)?!

3. Why don't you get the silencer instead?

4. Break in is easy! Just let it run for 4-6 tanks (160cc) at fairly low rpm 8000-10000 using a 8x6 or 9x4 APC prop. This is a ringed engine so it most run a fairly low rpm ...not at idle ...at full throttle opening ...you adjust the rpm with the highspeedneedle..!


Regards!
Jan K
Sweden

Hey Jaka,

Thanks for the response....

1. Good to hear.

2. Thanks, I'll check it out again for gunk. -- Nope on the black plastic carb .... aluminum.

3. Didn't know silencer was available -- I'll have to check -- any sources? (Failing that.... what does the linkage look like???)


4. Doesn't appear to be a ringed engine. I've looked in through the exhaust port and turned it over and can't see a ring. I'll have to run it a while longer. Like I said, I can only get it to run at about 1/3 throttle -- I'll have to check for debris and try again --


This engine is different than the others I have (GMS 25s, TT Pro 46, GMS .76). It doesn't have a low speed (idle) adjustment in the throttle barrel. Where is the low speed needle???

Thanks.

This is a loop scavenged, cast iron piston so use at least 25% castor in your fuel. If you run it on normal RC fuel you'll ruin it.

Thanks for the heads up. I'll have to dig up some castor oil before I try again.

Any other words of advice? Why couldn't I get it to run at wide open throttle??? Where is the idle adjustment? Assuming I'll have to blend to get a proper oil content, what do you suggest for a nitro content?

Thanks

I just dug mine out of a container of ATF to have a look at it
The carb is an air bleed so the idle mixture screw is the small one running alongside the main needle and aimed at the little hole in front. The exhaust baffle was used before mufflers came into vogue to keep heat inside at idle but mine has a strap on Enya muffler.

The running in process for a cast iron piston is quite different than even for a ringed engine. A new cast iron piston is softer than the steel liner but after a little running the surface work hardens to become harder than the liner. A few heat cycles also makes the piston grow slightly in size so the two affects have to be juggled to get it run in properly. Instead of going through the whole process here, have a look at http://www3.telus.net/dieselcombat/breakin.htm which explains it all in detail.

Hi!
Sorry! Of course the old .19 Veco is a lapped engine ...I'm getting old...!
The newer .21 Veco version had a ring and Mc coy made some trim piston/liners for this engine I recall...

All engines should be run-in with their carbs drums wide open just because then you know that the engine will get enough fuel (which means cooling).
When you run an engine on low rpm using the throttle drum to adjust rpm...you just dont know if the engine gets enough fuel....at least it is harder to detect.

Regards!
Jan K
Sweden