Originally Posted by
cczjordan
Is it a must to have that shim if to install into older gx series crankcase?
Not sure. I've never been one for swapping old things into new, or new things into old.
By using mis-matched parts you will never know if your getting 100% out of the engine or not.
Just go with what the factory put together as far as sleeves / crankcases etc. They matched those parts for a reason.....
