After a full rebuild, the lower right flipper hits weakly whenever the ball is past the middle of the bat.

Flipper weak toward the tip after a rebuild: EOS opening too early

Cause: The new end-of-stroke switch opened far too early in the stroke, dropping the flipper to its weak hold power before the shot.

Checks

• Flip and hold slowly by hand and watch when the EOS opens; it should open only at the very end, about 3/16 inch gap at most.
• Check the linkage spacing against the other flippers.

Fix

• Re-adjust the EOS switch so it opens only at the end of the stroke.

Systems

• Gottlieb System 3

Games

• Stargate

Related tips

• Flippers hold up but will not flip: corroded EOS switches

Source: Pinball Repair help group!! (Facebook group)