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03-31-2009 05:29 PM  9 years agoPost 21
rbort

rrProfessor

Franklin, MA - USA

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On its way!
The mailman just picked up the walbro clunk and a piece of tubing for it from me. You should have it by this weekend!

-=>Raja.

MA 1005 Hanson 280, 4220 flts
Spectra 27 3DMax, 3310 flts
Whiplash V1-2 Hanson 300, 1618 flts
Whiplash V2 Hanson 300, 473 flts

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03-31-2009 05:54 PM  9 years agoPost 22
TaleGunner

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Deer Park WA

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Thanks Raja

And everyone else who has helped I know I will eventually get it figured out. after a long talk with bill he suggested I check the clutch it could be slipping.

As for the carb I do understand them very well and will double check everything recommended somtime today and if it stops snowing I will test the outcome later today

Thanks to all

BTW: PATIANTS MY A$$ IM GONNA KILL SOMETHING
Just kidding Ill take it easy

CRASH! GLUE! REPEAT!
Spectra-G, Ion X-2

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03-31-2009 10:02 PM  9 years agoPost 23
TaleGunner

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Deer Park WA

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I took the carb apart to double check for pieces of dirt or the nitro stopper that disintegrated in the tank. I found a small metal curl from drilling or machining under the diaphragm had to have been there from the start as this was the first time I disassembled the diaphragm side.

I will test things out again as soon as weather permits

I don't think the contaminants under the diaphragm would cause the engine problem but we will see as soon it stops storming out
Some Spring HUH!

And Chris I did check the Teflon gasket it is on right thanks for the Idea though. The rest of the block was installed by Hanson so I didn't take that off, Maybe I should have checked that too?

CRASH! GLUE! REPEAT!
Spectra-G, Ion X-2

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04-01-2009 12:10 AM  9 years agoPost 24
TaleGunner

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Deer Park WA

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It stopped snowing enough to test it again. Its pulling the fuel from the primer bulb even faster now I flew for about 5-6 min before it did it.
I also cant get the primer bulb to stop pulling air I tried to shoot a video with the digital camera its not very good but look at the air in the return line maybe this is normal for a G26 but none of my other gas engines do this

Watch at YouTube

CRASH! GLUE! REPEAT!
Spectra-G, Ion X-2

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04-01-2009 12:28 AM  9 years agoPost 25
Justin Stuart (RIP)

rrMaster

Plano, Texas

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Is your primer bulb still in good condition? Althought Walbro claims to have altered their materials, I know some are saying that the alcohol in the gas is still destroying some plastic and rubber items in the carbs. Maybe you have a new style carb but an old style primer bulb? Maybe there is a leak in the plastic right around the edge where it is supposed to seal?

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04-01-2009 12:30 AM  9 years agoPost 26
TaleGunner

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Deer Park WA

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It is fine

Its a brand new engine less than 2 gal trough it in the last 2-3weeks trying to break it in

CRASH! GLUE! REPEAT!
Spectra-G, Ion X-2

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04-01-2009 01:51 AM  9 years agoPost 27
Justin Stuart (RIP)

rrMaster

Plano, Texas

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Are you getting a good spark? Did you pull off the spark plug cap to put the braided RF shield on the spark plug wire? In doing so, you might have damaged the conduction wires giving you an erratic spark?

This is a long shot.

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04-01-2009 01:53 AM  9 years agoPost 28
Billme

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MS

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That would be the auto clutch may need adjustment, not the motor clutch..

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04-01-2009 02:05 AM  9 years agoPost 29
TaleGunner

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Deer Park WA

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Spark seems fine

CRASH! GLUE! REPEAT!
Spectra-G, Ion X-2

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04-01-2009 02:18 AM  9 years agoPost 30
GREYEAGLE

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Flat Land's

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Hope I'm wrong but their not really a primer bulb are they ??
As I understand the fuel circuit it just fills the carb and then sends the excess back.

I don't think you can flood them although I know it does squirt a bit in the carb. Ra's got a great Vid and as I remember he just abuses the bulb in it

Heck mine alway's have air in them , many times their dry when I land, or under half full . I don' think it has nothing to do with the fuel flow during operation. Just gets the passages full. I pump em till I see fuel going back , bubbles - some times . Set the choke, pull it threw slow to get it wet one or twice and it usually hits on the first intentional pull.

If it's pullin fuel "backwards" while running thru the above back wash line / seems somethings plugged in the circuit from the atmosphere side of the carb or not sealing from the atmosphere which would be the little floating rubber tipped pressure needle.

Fuel should not flow backwards thru that line - it's one way

I'd pull it, remove both screws, remove the back plate, be very carfull and pull the fuel regulatior needle with the little tiney spring dont drop, or adjust the tab on the lever - sit it all aside. Then blow it out in a clean paper towel - so you can see if some thing comes out - their at least two circuits and I think maybe three. Some where you got to have a chunk of crud you picked up and got into the circuit.

How do you transfer fuel ? Hand crank pump with a rubber impellor ???

greyeagle

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04-01-2009 02:38 AM  9 years agoPost 31
TaleGunner

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Deer Park WA

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Fuel is not going backward just lots of air and when it runs it stops pulling fuel form the tank and starts to act like its running out of fuel.
fuel id from a crank gas pump it is filtered after the pump

this engine starts perfect and idles fine

CRASH! GLUE! REPEAT!
Spectra-G, Ion X-2

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04-01-2009 03:32 AM  9 years agoPost 32
GREYEAGLE

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Flat Land's

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Fuel metering needle is hanging up ??
My two bit's which at time's isn't worth a hoot -

I see one or another symptom, the tiney fuel metering needle is sticking or out of adjustment- which is very dicey to adjust without the walbro guage and book.

It has a lot to do with the diaphram also , or sucking air from under the seat of the bulb,

When it's asking for fuel the spring loaded rubber tipped metering needle either isn't opening far enuff or long enough duration to give adequate supply.

first maybe bigger clunk line - to start

I'd make the call and see what the man say's

Can you blow air fairely easy thru / starting at the tank vent line and feel it or hear it at the end of the carb supply line ?

greyeagle

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04-01-2009 03:42 AM  9 years agoPost 33
jschenck

rrProfessor

La Vista, NE.

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The rest of the block was installed by Hanson so I didn't take that off, Maybe I should have checked that too?
I would say yes! Also ran into an issue where the bolts were too long for the metal carb spacer causing the white teflon seal to deform when the bolts hit it = air leak. Make sure the bolts aren't too long.

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04-01-2009 03:52 AM  9 years agoPost 34
TaleGunner

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Deer Park WA

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Disassembled the carb one more time, double checked and recleaned everything again removed the metal spacer block checked bolt length seemed ok. found a walbro repair PDF and reset the metering needle. reassembled everything and managed 1 full tank of fuel,
still seems to spit and sputter and run a little rough but at least is pulling fuel for the whole tank now. started to readjust screws but it got dark so I retired to the shop. I also took the V3 pipe off and went to the stock muffler for the time being. sure is load now I also fixed the tail kicking problem with a new 8900 servo I will send the bad new one back to JR.

CRASH! GLUE! REPEAT!
Spectra-G, Ion X-2

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04-01-2009 03:58 AM  9 years agoPost 35
Justin Stuart (RIP)

rrMaster

Plano, Texas

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I also fixed the tail kicking problem with a new 8900 servo I will send the bad new one back to JR
Was this servo bad right out of the package?

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04-01-2009 04:21 AM  9 years agoPost 36
TaleGunner

rrElite Veteran

Deer Park WA

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seems like it was. It got progressively worse as I was chasing the tuning/fuel issue. I had another one in my spare parts and replaced it and its been fine since. hopefully I can get some tanks through it or figure out if it does have an air leak in the case/cylinder tomarrow.

CRASH! GLUE! REPEAT!
Spectra-G, Ion X-2

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04-01-2009 04:26 AM  9 years agoPost 37
jschenck

rrProfessor

La Vista, NE.

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Check the case temp of that servo after flying - if it's getting hot it won't last long. I wonder if your previous servo may have been overworked a bit from chasing a kicking tail/engine. Maybe turn down the gain a few points until you get the engine running smooth?

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04-01-2009 04:31 AM  9 years agoPost 38
FloridaHeli

rrVeteran

jacksonville, florida

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Similar problem on my Predator with Toxic Marine 231 PUH
Tailgunner,

I had a similar problem with the tail but since it was directly related to the engine rpm change I worked on that. I noticed bubbles coming from my Sullivan fuel filter on the inlet line. So, I used small tye-wraps like you have on the fuel lines in the video and secured every hose fitting from the tank to the inlet to the carburetor. It improved the performance enough that the engine maintained rpm and the tail stopped moving.

Since you don't see bubbles in the fuel inlet line try one tye-wrap at the inlet to the Carb. It may be picking up air there.

I still have a vibration in the canopy of all things but I'm sure it is because it is going rich and I'm still learning how to tune this beast.

Thanks to RAJA and all you guys I've got the overspeed completely fixed. Used the Margorie mechanical set up and RAJA's hidden software changes in my GV-1 to reduce the minimum throttle the GV-1 will go to. Now it can go all they way down to idle. Works great!!

This hobby is WAY too expensive!!

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04-01-2009 05:00 AM  9 years agoPost 39
TaleGunner

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Deer Park WA

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The tail kick was not just a wag it would rotate 12-18" 1/8 1/4 turn slowly then back with no input and it pretty much did from the time it was new mind you I'm still under 2 gal of fuel I just assumed the tail kick was related to vibs and engine surges but it just got worse until I replaced it. I think I just got a bad one on the servo. As I did with the V3 pipe and the pin holes. also the metal piece in the carb so I had my 3 things now I hope it will tune and break in. I will try the carb cleaner on the case again tomorrow and if it surges If it does I will send the motor back to AL and have it checked and resealed by him.

This has been quite a chase for the past 2 weeks and a huge learning curv.
I sure appreciate all the help and suggestion's.

CRASH! GLUE! REPEAT!
Spectra-G, Ion X-2

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04-01-2009 06:41 AM  9 years agoPost 40
pgkevet

rrKey Veteran

Wales

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The tail kick was not just a wag it would rotate 12-18" 1/8 1/4 turn slowly then back with no input
I had that happening on my Spectra until the wise Raja pointed out my headpeed was simply too low. I also had it happening on the first post fix lift-off of P-Gasser when I'd put the carb back on and foolishly assumed the needle position would still be good..that was due to varying headspeeds as the engine ran lean. They were all very short hovers.

I'm not saying these are your problems.. just throwing ideas..(611 and it's servo)

pgk

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HomeAircraftHelicopterGasser Model RC HelicoptersOther › Spectra engine issues
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