Mercury Mariner 200, 225 Optimax Outboards Service Manual, 90-855348, Page 326Get this manual
END CAP INSPECTION
1Inspect seal and o-ring for cuts and abraisionsIf replacement is required, install BRUSH and SEAL KIT 828714A 1
3If trim motor is overheated, thermoswitch located under brush card will openNormally, this switch will reset itself within minute
53781ThermoswitchSeal (Apply 2-4-C wfTeflon to seal lips)a-ring