Hole distances: 2-5/8 center to center between outer holes. 1-7/8 from center hole to outer holes. Homelite OEM Part 308653071 Valve part 678169004 Also replaces obsolete 309515001 Bolts directly to gas engines up to 6.5hp (horizontal shaft only) 2.5 gpm 3100 psi (w/6.5 hp) 3/4 Hollow shaft (Most common shaft size on horizontal gas engines up to 6.5 hp) 22mm Twist Couple Type Discharge fitting Filled With Oil Chemical Injector.If item is not to your satisfaction, please feel free to message us! This item is in the category "Home & Garden\Yard, Garden & Outdoor Living\Outdoor Power Equipment\Pressure Washers". The seller is "baitongminishop" and is located in this country: US. This item can be shipped to United States.