A compression release device (70) for a small internal combustion engine, including a flyweight (102) operatively coupled to a cam member (90) via a cam pivot shaft (100), wherein a lever arm (LA1-LA1) associated with the flyweight is longer than a lever a...

A centrifugally actuated flyweight member (94) is engaged with the operating member, wherein rotation of the camshaft above engine cranking speeds causes the flyweight member to move the operating member from a first position to a second position. A vacuum...

At starting and during first rotation of the crankshaft (23), cylinder (C1) operation is controlled in 'purge' mode (Mp) by controlling : near top dead center (PMH), closure of escape valves (19) and opening (OA) of an admission valve (18); near to bottom ...