Michigan Wheel props are designed for trouble-free service and easy repairability. By using only the finest grade alloys, Michigan Wheel aluminum props are stronger than most original equipment props. The rubber hub bonded inside every Michigan Wheel prop helps protect expensive shafts, motors, and gear boxes from damage caused by the prop"s impact with an object. Backed by a Limited Lifetime Manufacturer"s Warranty. 14-1/2 dia x 17 pitch. Michigan part number: 031024. Applications: Yamaha 150-200 HP ("79-"83), 175 HP ("78-"79), V6. Mercruiser ALPHA ONE: 2.5L, 3.0L, 3.7L+ ("86-"89), 4.3L, 5.0L, 5.7L+ ("86 thru); MAGNUM ("87 thru); MERCRUISER 1 120/140+ ("83-"85), 170/190+ ("85), 470/488 ("83-"84), 205/230+ ("85), 898/228+ ("83-"84), 260+ ("83-"85). Caution: Standard Trim Tab is 31640A1. Bravo One: 320 EFI, 350, 454 Magnum (All Years), 5.0L-7.4L (All Years). Mercury/Mariner 135 HP ("87 thru), 150 HP V-6+ ("78 thru), 175 HP V-6+ ("78 thru), 200 HP V-6+ ("78 thru), 220 HP V-6+ ("87-"88), 225 HP V-6+ ("81-"82), 225 HP Sea Pro/ Marathon (All Years), 250 HP V-6+ ("94 thru), 275 HP ("90-"94), 300 HP V-6+ ("83), 3.4 Litre ("84-"86). Note: "97 and newer engine models require aft washer (#23395).