I have been winterizing my freshwater cooled Yanmar 3JH2E in the water over the past few years, with the engine warmed up (by running the proper antifreeze through the water intake). Does the engine need to be warmed up before running the antifreeze through?
Winterizing Yanmar Out of Water
- Thread starter slazerow
- Start date
No but... Warm lube oil will drain better assuming you do that too.
You need not run the engine up to OP temp to open a thermostat. The engine coolant is a closed loop. All you do in winterizing is displace any fresh water in the heat exchanger, hoses and water lift muffler all of which are independent of the thermostat.
Congrats on the first winterization post... And it's only September!
Our son keeps his boat at SSYC and doesn't begin the ritual until late Oct.
You need not run the engine up to OP temp to open a thermostat. The engine coolant is a closed loop. All you do in winterizing is displace any fresh water in the heat exchanger, hoses and water lift muffler all of which are independent of the thermostat.
Congrats on the first winterization post... And it's only September!
Our son keeps his boat at SSYC and doesn't begin the ritual until late Oct.
Don is right. 3 things to remember: 1) do change the oil shortly before you get her out of the water. That way you can get the engine warmed up for an easy change. 2) Do check the engine coolant and adjust it for temperature drops expected in Waukegan 3) Once out of the water, get someone to collect water from the exhaust in a 5-gallon pail. Most people shut off the engine when it starts changing color thinking it is winterized. Using your tester, check that too and keep adding antifreeze until you're satisfied that the heat exchanger, muffler and hoses are well protected.
FYI, it helps if you have 2 friends: one to start & kill the engine when needed and the other one to hold the pail under the exhaust outlet. 2 ways to do it. Disconnect the intake hose at the through-hull and put it in a bucket full of antifreeze mix. Or shut off the through-hull, open-up the strainer (that will also give you a chance to clean it) and pour antifreeze in it when engine is started. If You do that, fill the strainer before starting engine. You do not want to run the impeller dry more than a few seconds.) good luck
FYI, it helps if you have 2 friends: one to start & kill the engine when needed and the other one to hold the pail under the exhaust outlet. 2 ways to do it. Disconnect the intake hose at the through-hull and put it in a bucket full of antifreeze mix. Or shut off the through-hull, open-up the strainer (that will also give you a chance to clean it) and pour antifreeze in it when engine is started. If You do that, fill the strainer before starting engine. You do not want to run the impeller dry more than a few seconds.) good luck
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Have a look at this: https://www.youtube.com/watch?v=PKky09u1fGU. It does work (I did try last spring). Make sure that your water pump works (there is a way of hydrolocking your engine if you pour water into that hose).