hi guys, wondering if anyone can help. got myself a 4 gallon old FX engine but with new front & rear bearings replaced by the seller before selling.
when i attach the brass collet, flywheel and then screw down tight the clutch nut the rotation of the crankshaft becomes 'gritty' and non free moving.
iv tried everything from shiming behing the collet, changing the standard collet to the short losi collet, using a differnt flywheel, removing the bearings
and then reseating them again (bearings seem perfectly free spinning both inside the engine and when outside the engine during reseating proceedure).
the crank spins perfectly free when the cluch nut is semi loose and has a loose grip on the crank, but goes 'gritty' when you start to tighten the nut in anyway.
the collet has definately grabbed a hold of the crankshaft as there is no sign of slippage.
completely at a lose and never had this issue before. can anyone help??