my new clutch slips!

[aussie merc]

well im assuming that you cut the flywheel and pressure plate if you didnt replace it and you didnt over lube the input shaft [ive seen it done and they tried to claim warranty] so being under clutched is most likely cause unfortunately only one way to fix thats remove and replace or rebuild to bigger spec [heavier springs] this is actualy a common problem in transport where generic 15x2 clutches are common and one size dosent fit all