Reply To: Uncertainty regarding Sierra Gear Case Seal Kit

[STEVEN HOLM]

Bob, Thanks for the input.  The two will fit under the water pump, makes sense to use them.  I examined all the seals in the kit, with a magnifying glass.  In the rubber, on the prop shaft seal is stamped N182031, also OEM.  Same on both.  Difference though, number 2 stamped on one and a number 3 stamped on the other.  Looking at a second Sierra bag, Seal Kit #18-2884, same exact stampings including a 2 on one seal, 3 stamped on the other.  Drive shaft seals are free of any stamping, in the metal or rubber seal material.  On Marine Engine’s website, the Sierra seal for the drive shaft has a part # 18-2032, a note saying “1 required per assembly”.  Though not shown in the expanded depiction of the gear case (diagram) which includes all the Reference numbers, examining the Gearcase Head Assembly #038757, only $226.43, ouch!   Here it makes a note, to purchase one Sierra part 118-2031 seal.  In addition to all of this, had not noticed something before.  Clicking ones way through, in the Marine Engine website, to the Sierra Seal Kit #18-264, an expanded list of what is included: 1 each of the seals for the drive shaft and the prop shaft with the part numbers 18-2032 and 18-2031, respectively.  The question, why are 2 of each placed in every kit when only one of each is required?  Will leave it there!  Thanks again for your assistance, Steve