Good evening, everyone. I haven’t seen many posts about 4.5L repairs, so I wanted to share the photos I took this morning of my thermostat replacement. This one started sticking open last week at 1,110 hours, so I wanted to replace before it thought about sticking shut.
Points to Merc for placing it front and center, but I really wish they used a gasket that came off easily. I probably spent an hour cleaning up the sealing surfaces, but the second gasket under the thermostat came off in one piece.
Parts used:
- 8M0204687 - thermostat sealing gasket
- 8M0079167 - housing gasket
- 8M0089715 - 140º Thermostat
Parts total from boats.net was $33.54 plus shipping.
Points to Merc for placing it front and center, but I really wish they used a gasket that came off easily. I probably spent an hour cleaning up the sealing surfaces, but the second gasket under the thermostat came off in one piece.
Parts used:
- 8M0204687 - thermostat sealing gasket
- 8M0079167 - housing gasket
- 8M0089715 - 140º Thermostat
Parts total from boats.net was $33.54 plus shipping.