Serpent Mega ZX 21 Offroad Race engine

HVoltage · **Posted:** Thu Jul 07, 2005 14:05:17

I have also ZX 21 Race and I'm having that kind of problems, it work fine about 5 minutes and then it keeps stalling on idle or on the track when I slow down or when I hit the brakes.

After two ruined races and ripping of my hair I opened hole engine and I found piece of rubber under the main needle, it was quite big and it dosent fit through fuel line nipple, all o-rings was on good condition and also bearings and all other stuff. I havent tryet it yet after cleaning and checking, so let's see if this is the reason for the problems.

I'm using Sirio 7 Cold glow plug also tried Novarossi 4 and 5, and yes I have checked clutch, brakes and all other stuff which may stop engine...

Still having hope for this great engine, it has great bottom and top-end
(IMO).

Picture of the rubber piece...

florianlaux · **Posted:** Thu Jul 07, 2005 14:14:23

...yes, power is great!

...run it lean and you will have no problems........

HVoltage · **Posted:** Thu Jul 07, 2005 14:20:55

I will, I don't mind if it breaks (anymore)

I have lot's of OS V-Specs on the my garage...

HVoltage · **Posted:** Thu Jul 07, 2005 14:25:49

florianlaux:

How long your full filled tank lasts when you have it on "lean" settings?

Ger · **Joined:** Fri May 06, 2005 09:46:03 **Posts:** 44

I have been using the original MEGA normal plugs (#5 and #6) and RunnerTime fuel... didn't even stopped once. It has great bottom torque and it is easy to find the right carb settings without running it sooo hot.

I would try using original plugs and good quality fuel first if I were in your shoes. :idea:

florianlaux · **Posted:** Thu Jul 07, 2005 21:36:29

florianlaux · **Posted:** Thu Jul 07, 2005 21:37:46

XRAY - Model racing cars

Serpent Mega ZX 21 Offroad Race engine

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