Water Pump Kit 

Interchanges/Replaces

Mercury Marine

• 84188M
• 84188T

Yamaha Outboard

• 663-W0078-00-00
• 663-W0078-A0-00

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
18-0256	Yamaha Outboard 91290-08045-00 97095-08045-00 97290-08045-00 97370-08045-00 97395-08045-00	2	Bolt		N/A
18-0292	Mercury Marine 27-81417 27-81417M Yamaha Outboard 663-44315-00-00 663-44315-A0-00	1	Wear Plate to Pump Housing Gasket		N/A
18-0294	Mercury Marine 27-81421M Yamaha Outboard 663-44324-00-00 663-44324-A0-00	1	Wear Plate to Pump Base Gasket		N/A
18-3069	GLM 89910 Mallory 9-45602 9-45602-10 Mercury Marine 47-81423M 47-82824M 47-97108M Yamaha Outboard 697-44352-00-00 6H2-44352-00-00	1	Impeller		N/A
18-3435	Mercury Marine 81419M Yamaha Outboard 663-44322-00-00	1	Insert Cup		N/A
18-3436	Mercury Marine 81420M Yamaha Outboard 663-44323-00-00	1	Wear Plate		N/A
18-3297	Mercury Marine 28-97089M Yamaha Outboard 90280-03M03-00 90280-03M07-00	1	Impeller Key		N/A
18-1830	Mercury Marine 26-81426M Yamaha Outboard 663-44366-00-00	1	Water Seal Damper		N/A
NSS	Yamaha Outboard 97095-08055-00	2	Bolt	No Image	N/A