Chainsaw Repair

 You need to pull the limiter caps and adjust the carb richer both high and low, adjust the low so it accelerates good and the high open up about 1  1/2 turns then back in until it cuts the fastest in big wood..  The Cs400 is a really nice saw when adjusted right and really rips with a muff modd.   Steve

Just  to make sure open the high up 1 1/2 turns more than what it's set at and then back in until it cuts the fastest not revs the fastest.   Most time the high ends up at 2 1/2 to 3 1/2 out from the seat.   Steve