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HomeAircraftHelicopterEngines Plugs Mufflers Fuel › TT39 Cuts Out
12-12-2004 04:31 PM  13 years agoPost 1
davemartin88

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Leesburg, VA

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Was flying my Raptor 30 w/ TT39 the other day, on the third flight, while I was about 25 feet up, lost power and engine died. Landed okay and now, engine starts fine but when I get to half throttle, engines starts to sputter and cuts out. Looks like it is getting fuel. I changed the line in the tank a couple of months back, tried a different glow plug, tightened all the bolts, problem is still the same. Pinch test seems fine, about 3 seconds before the engine starts to die. One thing I noticed was that if I compress my exhaust deflector, creating some back pressure, engine will stay running-- not clear what this is telling me, if anything? Going to go over everything again but thought I'd see if others have seen something similar and where this might lead me? Thanks in advance.

Dave MartinLeesburg, VARaptor 30 V2 and VE

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12-12-2004 05:03 PM  13 years agoPost 2
Al Magaloff

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12,199 Posts- Enough Time Wasted. See Ya!

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Dave, make sure the cylinder head bolts are tight.

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12-12-2004 05:48 PM  13 years agoPost 3
airdodger

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Johnston USA

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Try opening the needle some, because of what you stated, ( pinching the exhaust deflector helped) that makes the motor richer. Chris

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12-12-2004 06:14 PM  13 years agoPost 4
Al Magaloff

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Good thought Chris.

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12-12-2004 09:38 PM  13 years agoPost 5
davemartin88

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Leesburg, VA

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Thanks, I did check the bolts and they were tight. I also tried to open both the low and high needles (one at a time) and this seemed to help a little bit. Instead of half throttle, seemed to go a bit further before cutting out? The odd part is how this happened very suddenly and now is there all the time. Thanks for the initial thoughts.

Dave MartinLeesburg, VARaptor 30 V2 and VE

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12-13-2004 12:00 AM  13 years agoPost 6
airdodger

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Johnston USA

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Thanks Al. Chris

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12-13-2004 01:52 AM  13 years agoPost 7
Alan Szabo Sr

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Las Vegas, Nevada

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Is your muffler put on the engine by any chance with red RTV. If so my guess you have some floating in the cylinder.

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12-13-2004 02:02 AM  13 years agoPost 8
davemartin88

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Leesburg, VA

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Dropped the engine out and found that my clutch lining had come loose so will have to take care of that-- there was a bit of loose material and dust so wondering if some debris got in to my carb. Will take a better look tomorrow and post back to let you know what I find. Thanks for the replies so far.

Dave MartinLeesburg, VARaptor 30 V2 and VE

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12-14-2004 01:57 PM  13 years agoPost 9
davemartin88

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Leesburg, VA

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Replaced the clutch housing which includes a new lining, cleaned up the engine and put it back together-- engine is now too tight to turn within the housing-- will have to do some reading to see how to adjust this. Carb had quite a bit of dust so thinking that one of the needles may have been partially blocked-- hope to have it back in the air soon.

Dave MartinLeesburg, VARaptor 30 V2 and VE

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