1985 75 hp Water pump kit part number?

[TOY BOAT]

I have a 1985 75 hp outboard that needs an impeller. I want to replace it with the kit instead of just the impeller. Problem is that I have found two separate numbers for the same engine. Both are Sierra numbers. The first is 18-3314, and the other is 18-3517. I am not sure which one I need. Both say they are for my serial number. Does anyone know which one I need?

 

[Barnacle_Bill]

Re: 1985 75 hp Water pump kit part number?

The 18-3314 is for a 3 cyl motor and the 88-3517 is for a 4 cyl motor. http://www.iboats.com/Mercury-Impel...6911027--session_id.975293982--view_id.271497