Seller notes

Sierra 18-3317 Water Pump Kit Fits:Mercruiser MC-1 & R/MR/Alpha One (SN 2763442-6854392) *Models which have been retrofitted with an Alpha style lower unit (no pre-load pin in top of driveshaft) must use Alpha style parts (18-3320 and 18-3420) Replaces:Mercury/Mrecruiser 46-96148A8, 46-57234A1...

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