Hello Sides,
I have some ideas for the 42cc coil mounting. I beleive that the 46cc has the coil bolted to the cylinder like a Homey 45cc. If the 42cc coil position is the same as the 46cc, slightly to the left of center, in front of the flywheel we can make a 1/8" aluminum mounting plate with two tabs bent 90 degrees at the bottom. By using extra long bolts to attach the crankcase bottom at the flywheel end, they will protrude on either side above the motor mounts. This is where you attach your mounting, using lock nuts. Make your mounting plate over size at first and bolt it to the engine, making sure that you have flywheel clearance. Locate the correct position for the coil as it was in the saw. Then mark, drill and tap the plate. Mount the coil using short standoffs and lock nuts. Now you can disassemble and trim the excess materal from the plate. If the coil isn't located as stated, make the necessary changes to accomadate it. Good luck.

Dave