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HelicopterEngines Plugs Mufflers Fuel › TT53 Motor boggin out Climbout
04-07-2011 01:57 AM  6 years agoPost 1
wifeorheli

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reno, nevada usa

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hey guys well i have yet to have a problem with this motor all the sudden i am chasing the needles. Bogs out when i throw the stick up and its running hot i have to richen it up to the point where it has no power to climbout without it trying to die. Any help appreciated. Also there has been a weather change +20 degs. My low end out? I changed all the fuel line already blew air into tank no leaks. Im not a tuning pro.

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04-07-2011 02:07 AM  6 years agoPost 2
CX1

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Canada

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hows the carb gasket ?
is the carb still on tight ?

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04-07-2011 02:11 AM  6 years agoPost 3
wifeorheli

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reno, nevada usa

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yes nothing has been changed or touched. I have great smoke just wants to cut out when 3/4 of stick this is only when i slam the stick up for climbout then i richen it and no power driven me crazy. Should the low end matter in this situation?

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04-07-2011 02:24 AM  6 years agoPost 4
CX1

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Canada

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I found on my 53 that I need to tune the low end before I can adjust the high needle.
I tune the low end to get a smooth transition to the high needle then to tune to temp 185*F after that it starts to sound raspy

only other thing that comes to mind is the return line from muffler might plugged.

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04-07-2011 03:13 AM  6 years agoPost 5
wifeorheli

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reno, nevada usa

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i dont know what smooth transition means that it doesnt die or doesnt bog this is something i really need to learn so to start off should i restart from factory flush and three out on needle then what do i do how can i tune the low from there when there wont be good transition cause the high so rich?

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04-07-2011 03:28 AM  6 years agoPost 6
CX1

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Canada

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transition from low needle to high needle
when you move your stick past mid point is where this transition takes place
start back at factory settings
tune the low needle so it doesn't want to stall out when you go get close to mid stick. doing a pinch test of the fuel line 1 inch from carb it should take about 3-4 seconds before it revs up,if it revs up instantly you are too lean
after mid stick ( high needle) it should get up to speed even rich it should still spool up.
you will notice the engine speed drop when you go from low needle to high because the high needle is rich adjust high needle 2 clicks at a time till you get decent power

warm up the engine. a few pitch pumps should do this for you
check your engine temp on the bottom plate of engine with your finger you should be able to hold it there for about 5 seconds before finger feel burn. I would recommend a temp gauge to help you tune and tune it to a temp of about 200*F max.
if using the temp gauge check for temp where the heat sink meets the head

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04-07-2011 03:52 AM  6 years agoPost 7
wifeorheli

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reno, nevada usa

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CX1 very good info i will post after flight tomorrow thank you

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04-07-2011 05:05 AM  6 years agoPost 8
TMoore

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Cookeville, TN

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I have stock carb and no problems. I set mine up to push pull so it slides smooth. Theres no need for a os carb. Make sure you have all stock settings you should not have to touch the third needle. Check for air leaks in fuel tubing and in muffler. Also make sure the plastic shim in between the carb and the motor is good and tight.
Remember this? If the carb is good and tight since it sitting on a piece of plastic be aware that the carb body can warp, I've seen it so good and tight is a relative term. I would make it snug.

My suggestion would be to take the carb apart and find out if the barrel is sticking because what you are experiencing is exactly what leads up to the point where you punt the stock carb over the roof and get another carb. The carb barrel is sticking so the needles don't repeat when you rotate the barrel. Since you changed the ring recently did you make sure the cylinder wasn't ruined with a scratch? There are all sorts of reasons that the engine may run poorly but the most likely if all the internals are OK, is the carb, the stock carb is a POS.

TM

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04-07-2011 02:39 PM  6 years agoPost 9
wifeorheli

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reno, nevada usa

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k so for a new carb i have to get the os adapter plate right?

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04-07-2011 04:21 PM  6 years agoPost 10
jschenck

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La Vista, NE.

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Something else to check - I had a similar problem where engine tune would change even in mid-flight. Turns out the baffle inside the muffler was broken/loose.

The low end mixture adjustment on the TT-53 carb affect tune all the way up to about 7/8th throttle. It will make a big difference.

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04-07-2011 05:42 PM  6 years agoPost 11
TMoore

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Cookeville, TN

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Since the engine is so new, I would make absolutely sure the carb is the issue. Like jschenk said, check the muffler too. The issue we have seen is that the carb barrel sticks either in or out, you tune the LS needle to where it needs to be and it will change once the barrel moves to a new position because it either wasn't in or out when you adjusted the LS and since that position isn't consistent, neither is the tuning.

TM

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04-07-2011 07:46 PM  6 years agoPost 12
wifeorheli

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reno, nevada usa

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ive had a broken baffle before i should be able to here it floppin around inside when i tilt the heli right

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04-09-2011 11:38 AM  6 years agoPost 13
MartyH

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USA

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Did you change the gallon of fuel when this started? I've been fat dumb and happy flying away the day then all of the sudden the next gallon of fuel was totally different. Then the next one was very different only by the time I readjusted, I was back where I started which indicated that the gallon previous had been the oddball.

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04-09-2011 05:25 PM  6 years agoPost 14
wifeorheli

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reno, nevada usa

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nah same gallon but i had mixed to two partials together its towards the end i went and bought another brand new one so i will try today

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04-09-2011 09:05 PM  6 years agoPost 15
wifeorheli

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reno, nevada usa

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ok new fuel took it up cut out ounce then the plug was dead changed plug everything all good either the fuel was bad the plug or it just likes the cold weather

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HelicopterEngines Plugs Mufflers Fuel › TT53 Motor boggin out Climbout
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