The 547-K Big Block 4-cycle mount is a complete kit designed for the Briggs 305, Honda GX270 and Honda GX390 and similar series engines. The International spaced chassis plate offers 15 degrees of angle to maintain rear tire clearance and includes clamps.

The adaptor plate starts off as a piece of 5/8″ thick 6061 aluminum plate and is flycut on both sides to insure a flat mounting surface. We maintained thick cross sections throughout to retain the structural integrity necessary for the big power produced.

With the wide slots in the chassis plate and the 2 bolt locations in the adaptor plate you have nearly 3-1/2″ of lateral travel to place the engine where you need it for clearance and weight distribution.

The 547-K kit offers all of the features that their smaller counterparts have enjoyed but is now available for the larger engines.

BMC 547-K = International Spacing 3-5/8” (3.625”) from center to center on the frame rails

*Some applications may require that the engine mounting holes in the block be enlarged to accept the 3/8″ hardware in the adaptor plate.