RE: First glow engine
 

Try a Perry Pump, that will get the fuel up and probably stop the clogging of the line. I too suspect that the fuel tank is to far away, and needs a boost.

Cheers,

Chip

RE: First glow engine
 

I've got a perry pump in line with my engine on my Extra (same one as my avatar pic). Not that the engine needed the pump, but I've got a Pitts style muffler on the engine. The motor runs in any position, up down, inverted, right side up, no problems. You'll probably be ok with a pump.

RE: First glow engine
 

Well, I got it together and ran it, I had to turn in the high speed needle about 3 turns and the low speed about 2 1/2 turns.[&:]

Look at the [link=http://www.rc-airboats.com/gallery/albums/My-confidence/in_yard.wmv]vid[/link] and tell me if you think it's running right.

RE: First glow engine
 

You're still really rich, but you've come quite far. What I would like you to do, if possible, if put the camera on a tripod, and point it at the engine. Just so I can hear it. Lock the boat down, run the engine up to full throttle, and then begin to lean out the high speed needle. I should be able to hear the change in pitch. I also think you might be rich on the low speed needle too based on the level of smoke output when you open the throttle. First let's get your high speed dialed in. I also think that the pump has helped you too. BTW, nice video.

RE: First glow engine
 

I can do that. What I'll do is run it like you said, turn in the needle 1 click at a time, wait 10 seconds between clicks then I'll stop turning in when I hear a difference. You watch the video and tell me how many clicks to back it off.. I don't know when I can get to it though. I'll try tomorrow. Thank you.

RE: First glow engine
 

what fuel you running give name and %

and i agree try leaning a little

RE: First glow engine
 

Been too busy to take the video, I'll get it though.

Fuel Is: SIG Champion 2-stroke aircraft blend 1/2 castOr, 1/2 synthetic. 15% That's verbatim from the label.

RE: First glow engine
 

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Glow engines, such as yours, do not burn the oil in the fuel. An oily mess is normal. You cannot adjust the needle lean enough to prevent oil dripping still have the engine run. Do not aim for this objective. You can destroy the engine by running it too lean.

You are running good fuel, though there is no need for more than 5-10% nitro in a glow two-stroke. Burning more just shortens the length of time that your engine will run on a given tank size and will provide you with less than 500 rpms difference to boot. I find 10% about right for smaller two-strokes (less than a .60) and 5% fine for the rest of the larger ones. Much smaller two-strokes can easily utilize 25% to 40% nitro and put it to work very well.

Which engine is this?

Running it on the ground like that will lead to an early death. Although we can't see it, fine dust is passing through your engine when it is running. It is an excellent abrasive. Try to put some type of air filter on the carb if you want to run it down and dirty. Good luck with your engine.


Ed Cregger

RE: First glow engine
 

I say if going up in nitro gives you close to 500 RPM (thats a lot of power) and the cost and duration is OK, then go for it. It also makes the engine easier to tune.

RE: First glow engine
 

EDIT : It has been pointed out in a PM (thank you DarZeelon) that I've misspelled the word "Caster" It should be "castor. :eek:

Sorry for any inconvience this may have caused

RE: First glow engine
 

Well, no video, but I took it in 3 clicks and heard a change in RPM. I backed it off 3 clicks and now there is a hesitation when going to full throttle from idle. I think it was there before, but now I just notice it more.:eek:

RE: First glow engine
 

Ed Cregger asked:
It's a Thunder Tiger .61 PRO.

RE: First glow engine
 

Ok, if there is a hesitation on the transititon from idle you are probably rich on the low needle. Now comes the fun part, leaning the low needle. If you decide you are going to play with the low speed needle, keep in mind that small turns of the needle make big adjustments. When I work on a low needle, I only make adjustments in 1/8 turns. Some folks do 1/4 turns, but I'm picky. :) Also, I usually just close the needle and back it out 1 to 2 turns to start fresh, but I'm experienced.

With the engine off, close the needle 1/8 of a turn. Start the engine back up. run the throttle open and then go to idle. After the engine returns to idle blip the throttle open and closed and see if the hesitation goes away. Repeat until you have achieved a satisfactory transition.

RE: First glow engine
 

What happens when you pinch the fuel line?
If you get it running wide open, and pinch the fuel supply line just before the carb, the r.p.m. should pick up a tad, but not a tremendous amount. Do the same at a fast idle...

Might be a good idea to get yourself a tach?

RE: First glow engine
 

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You know, there was another fellow on the forums a while back that would wait for me to post something and then post just the opposite opinion, each and every time. Whatever happened to him? <G>


Ed Cregger

RE: First glow engine
 

Lately I've been wondering the same thing Ed...

RE: First glow engine
 

Sorry for the slow responses....The holidays are tiring.

I Played with it a little more......pinching the fuel line (at idle) killed the engine almost immediately. So i opened up the low speed 1/8 turn at a time, starting the engine each 1/8 th turn. slowly but surely 2 things happened. the hesitation went away and the exhaust got smokier.

I have a tach and a digital fish scale. 12 x 6 APC sport prop 11,910 RPM with 9 Lbs, 8 (or was it 13 ?) Oz. of static thrust.

I wet ahead and bought a 12.25 x 3.75 APC sport prop.....The guy at the hobby store said it would provide a lot more low end power.