RunRyder RC
 9  Topic Subscribe
WATCH
 1 page 647 views
HelicopterMain Discussion › Thunder Tiger 39 engine Problem
06-06-2004 04:58 PM  13 years agoPost 1
Laurence

rrNovice

Scotland UK

My Posts: All  Forum  Topic

My Thunder Tiger 39 engine will sometimes not turn over with the starter.

I have had this engine from new and have run a couple of tanks through it and it has always stared with no problem (It has been run rich (2.5 - 3 turns out on the mixture screw) and has not even been reved high enough to start to hover.

However, when I try and start it now there seems to be so much compression the starter won't turn it. It is even difficult to turn the hex shaft by hand past each compression cycle.

If I take the glow plug out it turns no bother at all and when I put the glow plug back in it generally starts and runs OK.
But when I stop it and try and start it again, it won't turn over freely without taking the glow plug out again!!!

I have tried changing the glow plug (OS A3) but there is no difference.

I was begining to think it might have siezed somehow but surely if this was the case it wouldn't turn over OK with the plug out.

Can anybody out there offer any suggestions?

Many thanks,
Laurence

PM  EMAIL  Attn:RR  Quote
06-06-2004 05:01 PM  13 years agoPost 2
WMac

rrVeteran

Skotlande

My Posts: All  Forum  Topic

Sounds like your engine's flooding. Fuel builds up in the combustion chamber and makes it hard to turn the engine over. When you take the plug out, the fuel can escape and your engine is free to turn over again

Make sure the fuel line to the carb is shut off when you're fueling up so that fuel will not flow into the engine and cause it to flood.

Will


Beep Beep! One Road Travel, with Dominic Byrne!

PM  EMAIL  Attn:RR  Quote
06-06-2004 05:14 PM  13 years agoPost 3
Laurence

rrNovice

Scotland UK

My Posts: All  Forum  Topic

Thanks for the quick response Will.

Can you advise how I can stop the engine from flooding?

Is it because I am running it too rich?

Sorry for the basic questions but I'm new to the hobby.


Laurence

PM  EMAIL  Attn:RR  Quote
06-06-2004 05:19 PM  13 years agoPost 4
Papacito

rrNovice

Tu culo

My Posts: All  Forum  Topic

Perhaps one other problem that U might be running into is that u'r filling the tank to much. When this happends, the pressure line (muffler) sends fuel to the cylinder, thus makeing it hard to turn. Also check if U have a mufler plug. If U do remove it before fueling.

I had the same problesm + this solved it.

Chic Dady

PM  EMAIL  Attn:RR  Quote
06-06-2004 05:26 PM  13 years agoPost 5
Laurence

rrNovice

Scotland UK

My Posts: All  Forum  Topic

I don't use a Muffler plug and I only filled the tank to about 3/4 full, but I'll watch out for this in future.

Thanks,

PM  EMAIL  Attn:RR  Quote
06-06-2004 06:08 PM  13 years agoPost 6
S_Owen

rrApprentice

Wichita Falls, TX.

My Posts: All  Forum  Topic

Use a fuel line clamp when the motor is not running and fuel is in the tank. Sometimes fuel will siphon into the motor when the fuel level is higher than the carb. You can put the clamp on the pressure or feed line. It really doesn't matter as long as you can stop the siphon.

[b]Murphy's Constant:[/b] Matter will be damaged in direct proportion to its value.

PM  EMAIL  GALLERY  Attn:RR  Quote
06-06-2004 08:06 PM  13 years agoPost 7
Branzzz

rrVeteran

Singapore

My Posts: All  Forum  Topic

i had this a few times. what i do is i simply tilt the heli so that the extra fuel in the cylinder will drain into the muffler. straight and simple. fuel is a liquid, and cannot be compressed much.

Raptor 50V2
OS 50SX-Hyper
GY502/9253
Hitec 6975
Airtronics ERG-VB
JR 3810

PM  EMAIL  Attn:RR  Quote
06-06-2004 08:16 PM  13 years agoPost 8
FENMAN

rrApprentice

CAMBS UK

My Posts: All  Forum  Topic

As everyone says it seems like you are flooding when you fill up the tank.
What i do is i use a set of locking forceps on the line from the tank to the carb,{i have a clamp on but it dont seem to trap the fuel line tight enough,i think i have thinwall fuel line}
Take out the glow plug and put the glow plug wand on it to burn of any excess fuel on the plug ,tilt heli to exaust side,with clamp on the fuel line,spin engine with the starter,when clear of excess fuel reinsert plug,remove clamp,, and start again
Hope this is of help

PM  EMAIL  Attn:RR  Quote
06-07-2004 04:41 AM  13 years agoPost 9
Andrew_S

rrVeteran

Gaston, South Carolina

My Posts: All  Forum  Topic

Maybe the starter battery is half dead???

Drewskie

www.congareeflyersinc.com

PM  EMAIL  GALLERY  Attn:RR  Quote
06-07-2004 08:18 AM  13 years agoPost 10
Laurence

rrNovice

Scotland UK

My Posts: All  Forum  Topic

I did suspect the starter battery at first but I changed it for a different one which was fully charged and it didn't help.

PM  EMAIL  Attn:RR  Quote
06-07-2004 09:19 AM  13 years agoPost 11
donlynn

rrKey Veteran

New Zealand

My Posts: All  Forum  Topic

Gidday

It's not the starter or battery as it went ok after plug removal.(unless intermittent fault)

I'm with above flooding, I have a wee plastic K & S clamp just before the carb.
If I dont clamp this during refuel, even a 1/4 tank them my engine will hydrolock as described and the fix is as described.

helikraft.com sell them $5 for 2, I have the faster red ones.

Regards Don

PM  EMAIL  GALLERY  Attn:RR  Quote
06-07-2004 09:20 AM  13 years agoPost 12
Jan Kos

rrNovice

Lelystad, the Netherlands

My Posts: All  Forum  Topic

I had the same problem with a moskito. With this heli the engine is upside down and whenever I fill up the tank I do it by taking of the fuel line which goes to the carburator and fill it from there. And when it is filled up, I quickly change the fuellines back again. Never had a fuellock since.

Regards,

Jan

PM  EMAIL  GALLERY  Attn:RR  Quote
06-07-2004 09:21 AM  13 years agoPost 13
Andrew_S

rrVeteran

Gaston, South Carolina

My Posts: All  Forum  Topic

Maybe something, like the fuel line is caught in the fan and has it in a bind.....

Drewskie

www.congareeflyersinc.com

PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 1 page 647 views
HelicopterMain Discussion › Thunder Tiger 39 engine Problem
 Print TOPIC  Make Suggestion 

 9  Topic Subscribe

Monday, December 18 - 9:10 am - Copyright © 2000-2017 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online