I'd suspect weak connection from coil to power driver board. Or wrong or worn plunger.

You can try the 23-800.

LTG : )™

Coil tight between coil stop and its bracket?

Assembly tight to the playfield?

Cool. Now tighten wires in the IDC connectors and wires of the same color joined to one lug on a coil - resolder them.

LTG : )™
Disclaimer : Look good is never enough.

Kickout probably isn't weak, it's just rattly and losing momentum. Best fix I've found for any MB is to shim up the plunger a bit, so it touches the ball when the ball is in the scoop ready to be kicked. The plunger starts off pushing the ball, rather than rising up 1/4" and striking it on the way up. Result is nice, even and fast kickouts.

Shim the plunger by cutting a small strip of regular flipper rubber, placing it on top of the existing rubber stop (where the base of the plunger rests) and wrapping some tape around the whole bracket to keep it in place. Make sure the plunger doesn't stick up to high, usually need just 3/16" more elevation. Also, be sure to grind down any burrs or mushrooming on the edges of the scoop. If you've already replaced the sleeve, it should work great after this.

I would give metallik's approach a go first. I have had to shim things a couple of times, they get worn and just don't work as they first did. It can make a world of difference.