This pump was used on the engines listed below (and the boats that we are aware used these engines... There could be other combinations as well):
• 2GM20F (Capri 26 and Catalina 270)
• 3YM20F (Catalina 270's Hull 352, 354 & up, Catalina 309, Catalina 315)
• 3GM30F (Catalina 320)
• 3YM30 (Catalina 320 Hull 994 & up, Catalina 355)

• Outside diameter (of a new impeller): 2"
• Width: 7/8"
• Inside diameter: 12mm (.475")
• Quantity of Blades: 6

1) For the 3YM series engines, double check the measurements and gasket style (flat or O-ring) as we have owners report that their impeller was different than expected based off the year alone.

2) For the 2GM and 3GM series, there were 3 different water pumps used on these engines. This kit is for pumps that have straight barbs that are cast into the pump. See "May we also suggest" below for kits for the other pump configurations.

3) We carry these parts for your convenience though you may find them elsewhere less expensive due to the manufacturer's restricted distribution. C-315, C-355