engine speeds up before quitting, then the idle mixture is too rich. If the engine speed decreases
and then quits, then the idle mixture is too lean.
Method B: Close the throttle setting below the stable idle position. When the engine starts to
run unevenly, open the throttle all the way.
If the engine hesitates before picking up speed, then the idle mixture is too rich. If this is difficult
to observe, then allow the engine to idle slightly longer before opening the throttle. If the idle
mixture is too rich, there will be plenty of smoke and unburnt fuel from the exhaust.
If the idle mixture is too lean, the engine will stop abruptly when the throttle is opened.
If you have determined that the idle mixture is too rich, then turn the idle mixture adjustment
about 30˚ clockwise. If it is too lean, then turn the adjustment 30˚ counter clockwise. Repeat the
test again. If necessary, adjust the idle mixture another 30˚ Never go more than 30˚ at a time.
Never go more than one full turn total. If your engine cannot be adjusted within this range, then
you may have other problems
Warranty
Your engine is guaranteed to the original purchaser to be free from defects in materials and
workmanship for a period of 3 years from the date of purchase when returned for service accom-
panied by proof of purchase (register receipt, credit card invoice, etc.). Crash damage
or problems caused by improper use are specifically not covered under this warranty. Damage
caused by customer disassembly, use of improper or substandard fuel, use of improper accesso-
ries (such as propellers, glow plugs, etc.) or any use of the product other than its specific intended
use will automatically void this warranty.
Always keep the outside of your engine clean. Use clean, fresh fuel and keep your fuel can,
pump, and fueling system free from dirt particles. Install a fresh fuel filter between the fuel
tank and carburetor, and between your fuel pump and filling line to prevent any potential of
dirt entering your engine.
Service Procedures
Should your Thunder Tiger engine require service, please follow the following guidelines:
1 Do not return the engine to the place of purchase, as they are not authorized or equipped
to perform service.
2 Remove the engine from the model. We cannot accept equipment for service other than
the engine.
3 Along with your engine and proof of purchase, enclose a complete written explanation
detailing the problem(s) with your engine. Be sure to include your name, address and
daytime telephone number. BE SURE TO INCLUDE YOUR PROOF OF PURCHASE!!
4 For repairs not covered under warranty, the charges will be billed to you C.O.D. Please
mention if you wish to have an estimate of non-warranty repair charges prior to us beginning
service. (This may cause a slight delay in your repair.)
5 For customers outside of the U.S. and Canada, contact the authorized Thunder Tiger agent
in your country.
6 For U.S. and Canadian customers, send your engine via insured mail or U.P.S. to
Engine Care
ACE HOBBY DISTRIBUTORS , INC.
26021 Commercentre Dr. Lake Forest, CA 92630-8853 , U.S.A.
12 13
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