The PO installed a Yanmar 3GM30f to replace the A4 in our boat. The rear mounts on the Yanmar are wider than the A4 so he installed the
engine 8"-10" forward.
Installation worked fine except the
engine now stuck into the
galley so he built a surround to hide it. The surround made the
galley a PITA to
work in as you couldn't stand comfortably in the much reduced foot space and had to
work at long distance as you leaned over the engine surround. Decided to try and move the engine back.
To get a narrower stance moved the port rear
motor mount to the starboard side and bolted it to the front of the engine mount bracket instead of the rear. On the Port side fabricated a simple 'L' bracket and bolted it to existing threaded holes at the rear of the engine instead of factory mount on the
transmission. Replaced the huge Yanmar
motor mounts with smaller foot print after market mounts. With those modifications was able to move the engine about 8" more aft. It still stuck into the galley area by an inch or so. Rebuilt the galley with about a 2" wider counter so the engine no longer protrudes into the galley sole. Actually a much better arrangement as used the additional couter
depth for
storage against the aft bulkhead. Greatly improved
storage in the galley which the boat was seriously lacking.