**JPL4500 Manual Adjustable 6" Outboard Motor Jack Plate for Boats - Heavy-Duty Boat Steering System Upgrade for Smooth Performance on Lakes & Rivers**

Product Specifications Why a Jack Plate? A jack plate will compensate for a long shaft engine! Does Your Boat Need a Jack plate? For this one, we consulted our network of industry professionals. Their responses were all varying degrees of a resounding YES. But how can you tell if your boat would benefit from a jack plate? What are some of the symptoms? Poor HoleshotYour outboard’s not perpendicular (straight up & down) in relation to the water at top speed.If you can trim the engine all the way up without the prop letting go or with no appreciable loss of water pressure at full throttle.The hull doesn’t seem to “lift” like it should.Boats rigged with jack plates, but otherwise identical to yours, turn higher-pitch props and perform better keep in mind that these characteristics can also be indications of other, more serious problems, but if you’re experiencing any or all of the above, your boat could be a good candidate for a jackplate implant. Jack Plates are the perfect solution for long shaft engines with a short shaft transom! The engine side holes of the Jack Plate are drilled 1.500 inches higher than the transom side. Combined with the 6 inches of adjustable vertical lift you can obtain 5.500 inches at a maximum height to raise your long shaft engine and make it workable on a short shaft transom boat!Here are the pre-drilled hole dimensions listed below in inches: Pre-drilled holes for 1/2'' stainless hardware12 7/8'' across the top two holes from center to center9 7/8'' across the bottom two holes from center to center8'' of vertical distance between the top holes and bottom mounting holesIf your holes do not match this configuration, you can drill into the aluminum plate. However, by modifying the unit returns will not be accepted.