kawasaki FR691v smoking

[ACF]

Sorry to hear that.

Failed piston rings are not very common on this design from what I have seen over the years. Hopefully the cylinders are not scored badly.
i know have 2 mowers with this engine one is over 10 years old
There is a chance the heads have warped in the pushrod area near the cylinders. That was an issue on some due to repeated overheating

As this engine been run in dusty with the air cleaner off for any length of time?
not sure but there was a build up of dirt in carb intake
EDIT: Don't overlook the breather valve located under a cover on top of the engine block. These have been known to fail the flutter valve and the gasket before.
there is a lot of dust/dirt build up on the cover of the breather valve
Having 130 PSI compression just does not sound like failed rings. Scoring of the cylinder is still a possibility.

 

[MParr]

Is the engine past it's 3 year warranty?

 

[ACF]

yes. pulled engine lots of carbon on top of piston and head cleaned both,
found the oil rings were compressed into groove completely even with the piston, also there was no movement when trying to push in. the compression rings had movement and stuck out from the piston grooves like i have seen in the past. there were no hash marks on cylinder walls and i know that it is needed, is there a way to put back without buying that ball hone

 

[slomo]

Unstick the rings. Clean the ring grooves in the piston. CLEAN as in hospital clean. Put it back together. Forget about the hash marks. Run the sucker at max revs all the time. Keep the oil on the full mark at EVERY mow.

New rings will require honing slash bore prep. Current rings are already broken in.

Make sure the rings rotate around the piston loosely before putting the piston back in the bore. Oil the rings before reinstalling. Clock the rings 120 degrees apart or whatever the engine manual says to.

 

[StarTech]

Actual ball or flex hones are for breaking the glaze and will make taper and out of round worst. You would need a ridge hone to true a cylinder. and you go pass
0.005 of the current spec you need to hone to the next oversize.