Searay87
Petty Officer 2nd Class
- Joined
- Sep 10, 2009
- Messages
- 106
Re: Winterizing question - making sure all water out
I don't know your engine but typically there's more than one line at the thermostat. On my engine there are three. The raw water inlet, the inlet to the water circulating pump and the outlet to the exhaust manifold.
Merc instructions say to remove the thermostat housing, remove and inspect the thermostat and pour the A/F into the block through the housing. The also say to remove and drain all water hoses on the engine including the intlet line to the power steering cooler. If you follow the raw water inlet back to the transom you should find your PS oil cooler if in fact you have one.
The former owner didn't follow these instructions. When I removed the T-stat housing the stat was badly corroded and sprung open. Temperature sender was also bad. I think it's a good idea to annually inspect the T-stat and for the cost of a new gasket it will provide assurance that the critical component like the t-stat ($20 part) is still in good working order.
I've read where some of the posters here change them annually.
I don't know your engine but typically there's more than one line at the thermostat. On my engine there are three. The raw water inlet, the inlet to the water circulating pump and the outlet to the exhaust manifold.
Merc instructions say to remove the thermostat housing, remove and inspect the thermostat and pour the A/F into the block through the housing. The also say to remove and drain all water hoses on the engine including the intlet line to the power steering cooler. If you follow the raw water inlet back to the transom you should find your PS oil cooler if in fact you have one.
The former owner didn't follow these instructions. When I removed the T-stat housing the stat was badly corroded and sprung open. Temperature sender was also bad. I think it's a good idea to annually inspect the T-stat and for the cost of a new gasket it will provide assurance that the critical component like the t-stat ($20 part) is still in good working order.
I've read where some of the posters here change them annually.
