There is no fixed replacement interval for a thermostat gasket
Remove the top (vent) and bottom (drain) screws from the lower unit
Also compatible with certain Mercury/Mariner 2-stroke outboards originally manufactured by Yamaha
The best way to ensure fitment is to check your original part number against our Part Number Matrix
Starter Solenoid Relay – Fits Mercury 8HP 9.9HP 15HP 30HP 40HP 50HP 60HP 75HP 90HP 4-Stroke (Replaces 89-825096T, 825096T01, 825096T, 18-5821) 75-225HP There is no fixed replacementProduct Details This Starter Solenoid Relay is an aftermarket replacement designed for Mercury 4 stroke outboard engines ranging from 8HP to 115HP, covering model years 1998 through 2010. Engineered to deliver reliable starting performance, this 12V relay is a direct fit solution for a wide range of Mercury outboard configurations including E, EH, EL, ELH, ELPT, ELPTO, M, MH, ML, and MLH series motors. This relay replaces OEM part numbers 89 825096T,