Starter went out on the (1988) 843. Bought OEM replacement from bobcat dealer. The new starter is an "upgrade" from the original (no longer available). The new starter does not come with a flange mounting shim so I used the shim off the old starter, but it set the pinion gear back to far so it wouldn't engage the flywheel. Then I trying mounting it with no shim at all, which set it up too close to the flywheel. The parts counter is confused because there is no part number for a new shim to space it at just the right distance from the flywheel. What am I missing here? Is there another way to manually shim the starter/ make a shim? It needs to be roughly half the thickness of the old one ( which is about 5/8" thick)