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How can I Fix my R484sp lawn mower Champion?

Start problem.Items checked &found ok,ignition,spark plug, carb, fuel tank cleaned , fresh fuel, is there a easy start i notice a momentry exhaust lift on the compression stroke, The engine fitted is SUMEC-LINHAI 150SV .
ALEX, December 2010
The engine you have is a Chinese Honda clone, and I would bet money that the ignition coil is duff. Usually, they spark in open air, but fail under compression.

Tecumseh coils can be modified to fit, are plentiful, and last longer than the rest of the engine.

phil_saunders(a)bigfoot.com

Phil Saunders, January 2011
link Click here to see other fixes for Champion R484sp.