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16 dia x 16 pitch. Michigan part number: 031051.
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).
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Q:what do I need to install a propAsked on 10/6/2009 by chopper from ws
A:That is kind a of a broad question. If you will, please call tech support at 1-888-683-7866 and we can ask a few more questions and answer your question at hand.Answered on 10/9/2009 by Bryant C from Tech Department
A:Please contact our technical department at 1.800.334.6541 for further assistance.Answered on 10/27/2009 by Jordan from Overton's