MF I have the same situation nearly every day looking at a number of full crank high arch mowers here. Problem with all these is the petrol tanks that they made to fit in behind the rear section. I got all carried away with cowl a couple of days ago on one with the tank at the front, I wanted to turn the cowl sideways so the motor could go east west with the cowl/starter north/south. All good, cut the side out of the cowl so it could go over the steel fan shroud as they did on the high arch ones, was looking good till I realized that in turning the cowl it put the petrol tank on top of the muffler. As for your 125 the only thing I would be looking at is trying to pick up a sidethrow slasher base but you may still have redrill the base to get the motor in a north south orientation. The motor I have to change the flywheel on this morning, I want the base from that (rusted out corner) so that I can cut the center of it out and weld that into a Powertorque sidethrow base so that I can fit a full crank to it just to use up one of the many good running full cranks I have here. If I could work out a way to mount a fuel tank on the cup starter cowls I could use the motors on the standard pressed metal bases. I go to bed at night thinking of ways to solve all these problems, keeps the grey matter spinning.. Just added a pic you can see my problem with it, the tank only clears the muffler by about 5mm.
