MICRON 2.8 REBORE REPAIR

here's the engine as we received it from Adrian.

Well lets get on with the job................

Here it is all stripped down and ready for assessment.

First step is to make the piston and contra-piston blanks and the tooling to make and fit them to the nicely rebored liner.

Upon dismantling the con-rod assembly a rather large problem was discovered, unless Micron deliberately made a two piece gudgeon pin.

O dear..................

 So we will start with Adrians damaged crankcase,replacing it with one that we found whilst rummaging through our parts bins, then move on to cleaning up the back plate ready for reassembly.

Next it's clean up the crankshaft measure and check that there's no wear. All good there, so we'll refit the original crank back into our replacement case and assemble the front end. The prop washer and nut are far to shabby for us to allow out the door so these will be replaced at the same time.