What engine are you running?
In general, if the engine is running rich, you should be fine. If it's running too lean, you run the risk of overheating it and damaging the engine.
Nitro Knowledge Base: http://nitrokb.netne.net
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Kyosho V-ONE RRR WC (x2) \ XRAY T2'007 \ Also owned: XRAY NT1 & Mugen MTX-4