Mariner Mercury Outboard Thermostat Kit 9.9HP 15HP 20HP 25HP 30HP 40HP 50HP 4 Stroke. P/N: 825212A1

New Mercury, Mariner Thermostat Kit This kit will fit the following Four Stroke models: 9.9hp 1999 - 2004 0P075166 - 0P325499 15hp 1999 - 2008  0P75166 and up  (will NOT fit models after 2006 serial number starting 0R_____) 25hp  1998- 2005  0P075166 - 0P40099 (not EFI models) 30hp 1999 - 2005 0P017000 - 0P400099  40hp 1999 - 2020 0P017000 and up 50hp 1995 - 2000 0G231123 - 0T178499 If you have any doubts whether these will fit your outboard, please email your model and serial number. These are OEM parts, not aftermarket/pattern items Thank you for looking.