RunRyder RC
 5  Topic Subscribe
WATCH
 1 page 526 views POST REPLY
Scorpion Power Scorpion Power
HelicopterGasser Model RC HelicoptersOther › fuel proof thread sealer?
09-05-2009 08:01 PM  8 years agoPost 1
pgkevet

rrKey Veteran

Wales

My Posts: All  Forum  Topic

I'm getting bubbles in the Spectra's fuel line despite new line and new clunk line and the fitting dogged down tight and the fuel level above that fitting!!

All I can think of is that there's air getting in via the fitting theads? So what's gas/petrol proof and still can be undone if necessary?

pgk

PM  EMAIL  Attn:RR  Quote
09-05-2009 08:11 PM  8 years agoPost 2
Dood

rrProfessor

Wescanson

My Posts: All  Forum  Topic

There is fuel-proof Teflon tape.
It's the yellow stuff, not the white.

  ▲
▲ ▲

PM  EMAIL  GALLERY  Attn:RR  Quote
09-05-2009 08:14 PM  8 years agoPost 3
gramey

rrApprentice

United Kingdom

My Posts: All  Forum  Topic

I was getting this and thought it was the fitting but found it was actually drawing air in through the fuel line where it goes onto the fitting. Originally I went with the larger bore Tygon but changed over to the smaller bore to make it a tighter fit on the tank and carb. I also cut a small piece of tube and stretched it over the ends, similar to putting a cable tie on them, to ensure they were nice and tight.
So far it 's working.

Dumb thumb specialist

PM  EMAIL  Attn:RR  Quote
09-05-2009 10:06 PM  8 years agoPost 4
Fixit

rrElite Veteran

UK

My Posts: All  Forum  Topic

Can’t you just use small tie wraps?

I only like to fly gassed up

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
09-05-2009 10:24 PM  8 years agoPost 5
pgkevet

rrKey Veteran

Wales

My Posts: All  Forum  Topic

It's not the tubing...replaced with a different springier tighter tygon outside and used a dubro connector spring-clip on the end.. still getting bubbles even when the clunk line inside is submerged..

I can't think of anything apart from the threads at this time (clunk line is cable tied as it happens)...

pgk

PM  EMAIL  Attn:RR  Quote
09-05-2009 11:00 PM  8 years agoPost 6
Fixit

rrElite Veteran

UK

My Posts: All  Forum  Topic

pgk
Are the bubbles causing a problem running wise or do you just want to see them gone? a few bubbles wont do any harm because the delivery is more than demand, none of my gassers have been 100% bubble free.

I only like to fly gassed up

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
09-05-2009 11:29 PM  8 years agoPost 7
pgkevet

rrKey Veteran

Wales

My Posts: All  Forum  Topic

Are the bubbles causing a problem running wise or do you just want to see them gone?
..remember I was trying to solve a very lean run.. and have just put a new carb on.

I seem to have solved the bubbles for the moment...idea from carpman when he fixed a leak there with rubber washers. I didn't have any but used a 450 damper O ring each side and dogged it down until they flattened out. Now no bubbles until the felt clunk is exposed...

pgk

PM  EMAIL  Attn:RR  Quote
09-06-2009 12:00 AM  8 years agoPost 8
Fixit

rrElite Veteran

UK

My Posts: All  Forum  Topic

Test the O rings in a cup of fuel overnight and see if they hold up before you rely on them too much.

I only like to fly gassed up

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
09-06-2009 07:56 AM  8 years agoPost 9
pgkevet

rrKey Veteran

Wales

My Posts: All  Forum  Topic

Test the O rings in a cup of fuel overnight and see if they hold up before you rely on them too much.
..it's only a temporary measure. I could probably test them on the dining room floor after the number of spills I caused last night!

pgk

PM  EMAIL  Attn:RR  Quote
09-06-2009 11:35 AM  8 years agoPost 10
Fixit

rrElite Veteran

UK

My Posts: All  Forum  Topic

it's only a temporary measure. I could probably test them on the dining room floor after the number of spills I caused last night!
Been there done that and I’ve run out of idea’s on how to get rid of the smell and excuses as to why it smells.

I only like to fly gassed up

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
09-06-2009 03:32 PM  8 years agoPost 11
pgkevet

rrKey Veteran

Wales

My Posts: All  Forum  Topic

I’ve run out of idea’s on how to get rid of the smell and excuses as to why it smells.
..fart loud and blame it on dinner...?

Now today... it wouldn't start!!..never head that problem before. First time with the new carb 644. Removed the plug and nice spray comes out when pulled.. coulnd't find anyone to stick their tongue in the plug cap and hold the engine.. so will have to wait for dark for solo spark check...and the plod through...

..flew nice reliable, cheap nitro instead...Well actually, that wouldn't start either..but the reason was the start shaft slipping and it's possible to field drop the engine and fix stuff on that...

pgk

PM  EMAIL  Attn:RR  Quote
09-06-2009 04:43 PM  8 years agoPost 12
Justin Stuart (RIP)

rrMaster

Plano, Texas

My Posts: All  Forum  Topic

Have you tried the Hayes Medium fuel tubing? It's made of neoprene and holds to the fuel nipples pretty well.

Avant RC
Scorpion Power Systems
Thunder Power RC
Kontronik Drives

PM  EMAIL  GALLERY  Attn:RR  Quote
09-06-2009 05:38 PM  8 years agoPost 13
pgkevet

rrKey Veteran

Wales

My Posts: All  Forum  Topic

I've got hayes line i was using for the clunk.... taken it off...not good, doesn't last. Thinner walled tygon seems better..

..has anyone just tried polypropylene here? Cheap, easy to source etc..

pgk

PM  EMAIL  Attn:RR  Quote
09-06-2009 06:50 PM  8 years agoPost 14
smallplanes

rrElite Veteran

S.C. ,SSA

My Posts: All  Forum  Topic

This may be out of line but is it possible theres a small split in the tank seam some where?


Spectra G 26cc
Jewel
Bat 27cc
Trex 700<br

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
09-06-2009 07:40 PM  8 years agoPost 15
pgkevet

rrKey Veteran

Wales

My Posts: All  Forum  Topic

This may be out of line but is it possible theres a small split in the tank seam some where?
No. It was fine today..apart from not starting .. not a drop of seepage anywhere from the tank.

pgk

PM  EMAIL  Attn:RR  Quote
09-06-2009 08:08 PM  8 years agoPost 16
ddavison

rrVeteran

Brownsville, Pennsylvania

My Posts: All  Forum  Topic

Sounds like no spark. If you are getting fuel and there is spark it should start. Is the plug wet ? Maybe too rich on low end. What are the needle settings ?

DaveDavison,GasGob,WhiplashGas,Spectra,JRXG11MV,12X

PM  EMAIL  GALLERY  Attn:RR  Quote
09-06-2009 08:39 PM  8 years agoPost 17
pgkevet

rrKey Veteran

Wales

My Posts: All  Forum  Topic

..as said.. plenty of nice fuel mist when pulled with the plug out. Plug wet.. did try a new one too...

..also expect spark failure.

New carb 644.. set at 1.25 low and 1.5 high.. had to remove the 644 choke plate late because it fouled the stock air filter.

It was after i got back that it hit me that I have a killswitch so also possible that is faulty..will have to try with it disconnected too..

pgk

PM  EMAIL  Attn:RR  Quote
WATCH
 1 page 526 views POST REPLY
Scorpion Power Scorpion Power
HelicopterGasser Model RC HelicoptersOther › fuel proof thread sealer?
 Print TOPIC  Make Suggestion 

 5  Topic Subscribe

Thursday, October 19 - 3:41 pm - Copyright © 2000-2017 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online