DA 100 won't turn up

Home

My FlyingGiants

Blogs

Classifieds

FORUMS

Members

News

Search

Find New Posts

All Forums

Subscribed Forums

View Unanswered Threads

Search Forums

Show Posts Show Threads

Advanced Search

Tools

Post Hucker

Mark Forums Read

Sign Up!

cursor · 09-03-2007, 07:54 PM

I have a near new DA 100 that has about 4.5 gallons through it and was running well on a H9 Edge. Just installed it on a new AW 100cc Yak with MTW cannisters, started it, and it just won't make power all of a sudden (it only sat about a week). I re-plumbed and tested the the tank -- no joy. Checked and gapped the plugs -- no joy. Took off the cannisters and re-installed the mufflers -- no joy. Reset the needles to factory specs --again no joy. Both cylinders get warm about the same, both seem to put out exhaust -- but the top RPM on a Mejliak 28x10 is 4600. It was turning about 6200 on a TBM 27x10 before the swap. The TBM looks like a Menz copy, and should be a very similar load. Also switched to a synthetic fuel blend (Mobil 2T @40:1) from the break-in fuel (Pennzoil @ 32:1), but rechecked with the old blend after the problem -- no difference.

This engine when brand new had a somewhat similar problem for about 2-3 starts, and someone mentioned a sticky reed, but the problem went away, although the engine remained fairly hard to tune -- and in that case the cylinders were not heating evenly, while in this case, they seem to be.

I'm at the tearing the hair out stage, or would be if I had any. I own a butt-ugly ZDZ-80 that works perfectly, and did out of the box, but this engine looks like a million bucks, and runs like 25 cents. What am I not thinking of here? Any ideas? I hate to send it back, as I have events coming up that I really want to attend.

I realize all engines are subject to flaws, no matter the brand. Not trying to flame DA -- I just need help; I'm out of ideas. I saved awhile for this engine, and I'm a little disappointed so far, because it's been more trouble than fun.

zzw26n · 09-03-2007, 07:56 PM

delete ..........

k5mog · 09-03-2007, 08:00 PM

The timing pickup is pluged in backwards
Ralph

Dan_nO · 09-03-2007, 08:02 PM

Its new and under warrenty, call DA.

DATech · 09-03-2007, 08:14 PM

Hello
As mentioned above, check the polarity at the igniton sensor connection (JR type).
If that doesn't do it, try a different prop to confirm it's not a incorrectly marked or faulty prop. If it still doesn't run up, please let us know.

3ddd · 09-03-2007, 08:20 PM

maybe something got into the fuel nipple and has it plugged up.like a piece of flashing from the tank or such

Rolling Thunder · 09-03-2007, 08:33 PM

	Quote: Originally Posted by DATech
	Hello As mentioned above, check the polarity at the igniton sensor connection (JR type). If that doesn't do it, try a different prop to confirm it's not a incorrectly marked or faulty prop. If it still doesn't run up, please let us know.

Why are you working on a holiday?

aviti · 09-03-2007, 08:34 PM

I had my ignition sensor plugged in backwards and it turned like 4600 RPM. I was baffled and called DA, they said reverse the sensor plug and it went back to normal. They all run like 4600 RPM when plugged in backwards.

cursor · 09-03-2007, 09:27 PM

Hi,

Just tried all the suggestions (in order). Polarity is correct; patch cord ohms out -- output under 1 amp load from regulator 5.12v. TMB 27x10 actually worse rpm -- 3900. Don't want to run too long in this condition. Will call DA in the morning. I think its a sick child...

cursor · 09-03-2007, 10:01 PM

Whoops. I didn't read the advice too well -- and checked polarity at the output plug -- and not the input plug from the hall sensor, which, um, was reversed, just as predicted. RPM at factory settings now 6100 with TBM 27x10. Will retune and all should be fine. Thanks for all the quick and timely help, guys. Now I can go change my user name to "Moron" and sleep well. Seriously, thank you all.

3D-Seth · 09-03-2007, 10:21 PM

Glad everything worked out

rc4flying · 09-03-2007, 10:44 PM

cursor,

Glad to see that you have found your problem with the suggestions here. Now I have to suggest this same thing to my friend that sounds like he may have the same issue.

Thanks for bringing the question to the Giants and thanks to those that had the answer.

Sleepy, if you are reading this, take a look under the hood of your new 260.

1bwana1 · 09-03-2007, 10:50 PM

Note to self, remember this thread. Great job Giants crew!

crazyjoe · 09-03-2007, 11:33 PM

I know this is unrelated you may want to check i think DA recommends 32:1 on mobile synthetic

DATech · 09-03-2007, 11:34 PM

	Quote: Originally Posted by Rolling Thunder
	Why are you working on a holiday?

Dang...... Wish I would have known....Nobody tells me anything.....

09-03-2007, 07:54 PM	#1
cursor Worm Burner Join Date: Sep 2007 Location: Issaquah, WA Posts: 5	DA 100 won't turn up I have a near new DA 100 that has about 4.5 gallons through it and was running well on a H9 Edge. Just installed it on a new AW 100cc Yak with MTW cannisters, started it, and it just won't make power all of a sudden (it only sat about a week). I re-plumbed and tested the the tank -- no joy. Checked and gapped the plugs -- no joy. Took off the cannisters and re-installed the mufflers -- no joy. Reset the needles to factory specs --again no joy. Both cylinders get warm about the same, both seem to put out exhaust -- but the top RPM on a Mejliak 28x10 is 4600. It was turning about 6200 on a TBM 27x10 before the swap. The TBM looks like a Menz copy, and should be a very similar load. Also switched to a synthetic fuel blend (Mobil 2T @40:1) from the break-in fuel (Pennzoil @ 32:1), but rechecked with the old blend after the problem -- no difference. This engine when brand new had a somewhat similar problem for about 2-3 starts, and someone mentioned a sticky reed, but the problem went away, although the engine remained fairly hard to tune -- and in that case the cylinders were not heating evenly, while in this case, they seem to be. I'm at the tearing the hair out stage, or would be if I had any. I own a butt-ugly ZDZ-80 that works perfectly, and did out of the box, but this engine looks like a million bucks, and runs like 25 cents. What am I not thinking of here? Any ideas? I hate to send it back, as I have events coming up that I really want to attend. I realize all engines are subject to flaws, no matter the brand. Not trying to flame DA -- I just need help; I'm out of ideas. I saved awhile for this engine, and I'm a little disappointed so far, because it's been more trouble than fun.

09-03-2007, 07:56 PM	#2
zzw26n Bad-ass Super Contributer! Join Date: Mar 2006 Location: Shelby Twp., MI, USA Posts: 1,855 Awards Showcase Total Awards: 2	Re: DA 100 won't turn up delete ..........

09-03-2007, 08:00 PM	#3
k5mog Flyin' Around Join Date: Jan 2006 Location: M'boro, TN Age: 67 Posts: 22	Re: DA 100 won't turn up The timing pickup is pluged in backwards Ralph

09-03-2007, 08:02 PM	#4
Dan_nO Bad-ass Super Contributer! Join Date: Jan 2006 Location: Frankfort, Ky. Age: 46 Posts: 2,950 Awards Showcase Total Awards: 1	Re: DA 100 won't turn up Its new and under warrenty, call DA.

09-03-2007, 08:14 PM	#5
DATech Bad-ass Super Contributer! Join Date: Aug 2006 Posts: 380	Re: DA 100 won't turn up Hello As mentioned above, check the polarity at the igniton sensor connection (JR type). If that doesn't do it, try a different prop to confirm it's not a incorrectly marked or faulty prop. If it still doesn't run up, please let us know. __________________ Desert Aircraft Tech Support Phone: 520.722.0607 Fax: 520.722.5622 Email: info@desertaircraft.com

09-03-2007, 08:20 PM	#6
3ddd tissue ? cry baby jack wagon! Join Date: Jan 2006 Location: pyote,texas Age: 58 Posts: 2,651	Re: DA 100 won't turn up maybe something got into the fuel nipple and has it plugged up.like a piece of flashing from the tank or such __________________ Life's journey is not to arrive at the grave >safely and in a well preserved body,but rather to skid in > sideways,totally screwed up,worn out,shouting,"oh damn what a fine ride! AMA 98634 > HEY I GOT A DIVORCE----HELL YEA > Futaba, FROMECO:a good way to get a charge out of life,,3w all the way for a good day

09-03-2007, 08:34 PM	#8
aviti Bad-ass Super Contributer! Join Date: Jan 2006 Location: St Louis, MO Age: 42 Posts: 1,258 Awards Showcase Total Awards: 1	Re: DA 100 won't turn up I had my ignition sensor plugged in backwards and it turned like 4600 RPM. I was baffled and called DA, they said reverse the sensor plug and it went back to normal. They all run like 4600 RPM when plugged in backwards. __________________ Tony Vitiello St Louis, MO

09-03-2007, 09:27 PM	#9
cursor Worm Burner Join Date: Sep 2007 Location: Issaquah, WA Posts: 5	Re: DA 100 won't turn up Hi, Just tried all the suggestions (in order). Polarity is correct; patch cord ohms out -- output under 1 amp load from regulator 5.12v. TMB 27x10 actually worse rpm -- 3900. Don't want to run too long in this condition. Will call DA in the morning. I think its a sick child...

09-03-2007, 10:01 PM	#10
cursor Worm Burner Join Date: Sep 2007 Location: Issaquah, WA Posts: 5	Re: DA 100 won't turn up Whoops. I didn't read the advice too well -- and checked polarity at the output plug -- and not the input plug from the hall sensor, which, um, was reversed, just as predicted. RPM at factory settings now 6100 with TBM 27x10. Will retune and all should be fine. Thanks for all the quick and timely help, guys. Now I can go change my user name to "Moron" and sleep well. Seriously, thank you all.

09-03-2007, 10:21 PM	#11
3D-Seth Horizon Hobby Employee Join Date: Jan 2006 Location: Champaign, IL Age: 21 Posts: 3,077	Re: DA 100 won't turn up Glad everything worked out __________________ Horizon Hobby Desert Aircraft AeroGraphix Duralite Flight Systems Vess Propellers

09-03-2007, 10:44 PM	#12
rc4flying Bad-ass Super Contributer! Join Date: Jan 2006 Location: Hermitage, Pa Age: 57 Posts: 2,603	Re: DA 100 won't turn up cursor, Glad to see that you have found your problem with the suggestions here. Now I have to suggest this same thing to my friend that sounds like he may have the same issue. Thanks for bringing the question to the Giants and thanks to those that had the answer. Sleepy, if you are reading this, take a look under the hood of your new 260. __________________ rc4flying Papa Stek Joe *Team Futaba* Desert Aircraft Carden Aircraft "Fly them hard, but fly them safe"

09-03-2007, 10:50 PM	#13
1bwana1 Bad-ass Super Contributer! Join Date: Oct 2006 Location: La Jolla, CA USA Posts: 2,663 Awards Showcase Total Awards: 1	Re: DA 100 won't turn up Note to self, remember this thread. Great job Giants crew!

09-03-2007, 11:33 PM	#14
crazyjoe Bad-ass Super Contributer! Join Date: Jan 2006 Location: co Age: 51 Posts: 799	Re: DA 100 won't turn up I know this is unrelated you may want to check i think DA recommends 32:1 on mobile synthetic

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
DA 85 or DA 100?	GremlinX	Gas Engines	41	07-21-2009 07:05 AM
DA 100 Owners Manual?	3Dkid330	Gas Engines	9	09-14-2008 09:30 AM
DA 100 throwing props/spinners	Gary Powers	Desert Aircraft Support	50	01-18-2008 08:23 PM
DA 100 Transition Question	aviti	Gas Engines	21	05-12-2007 11:14 PM
DA 100 Needle settings?	GremlinX	Desert Aircraft Support	2	04-24-2007 07:52 PM