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Winterizing flush port vs muffs

Old 12-03-2019, 12:04 PM
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Default Winterizing flush port vs muffs

I am going to winterize my twin 200 HPDIS. Do you guys think it would be ok to pump the antifreeze in through the flush port with the engine off? Or would it be better to run it through with the muffs?
Old 12-03-2019, 12:22 PM
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If I'm correct those motor self flush when put all the way down. If I did flush with antifreeze it would be with muffs but if the stats don't open its kind of useless.
Old 12-03-2019, 12:26 PM
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it wont hurt anything if that's what your asking.

But as FishingFun stated- unless the thermostats pop open you are not really getting antifreeze into the entire cooling system. But most outboards should drain if lowered - so it's not 100% necessary to run antifreeze through the engine at all.
Old 12-03-2019, 02:17 PM
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Over 20 years of outboards for me and I've never run antifreeze thru them. I give it 15 minutes of running on the muffs before I put it away for the winter and thats it. Never had an issue.
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Old 12-03-2019, 02:41 PM
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Originally Posted by gregb5220 View Post
Over 20 years of outboards for me and I've never run antifreeze thru them. I give it 15 minutes of running on the muffs before I put it away for the winter and thats it. Never had an issue.
Agree
Old 12-03-2019, 02:52 PM
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Just make sure the engines are stored vertical, the water will drain, no antifreeze is required.

i did read that some of the V8 outboards need antifreeze.
Old 12-03-2019, 02:55 PM
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Winterize according to shop manual.
Old 12-03-2019, 04:14 PM
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You're over thinking it. Run on muffs to fog, and leave it tilted down, she will drain in her own
Old 12-03-2019, 04:24 PM
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Never heard of antifreeze in an outboard??
As mentioned, they drain, no water no problem, and I had outboards way below freezing for months without issues
Old 12-03-2019, 05:23 PM
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Originally Posted by Bamaskeetshooter View Post
Just make sure the engines are stored vertical, the water will drain, no antifreeze is required.

i did read that some of the V8 outboards need antifreeze.
Curious, what would be any different?

Originally Posted by Misterfu02 View Post
Winterize according to shop manual.
Nothing is better than the select few who always suggest this. Maybe he dosen't have the manual. Maybe he already checked and didnt understand fully. Maybe his outboard didnt come with a manual. I have to think those who are asking are already past the manual part.
Old 12-03-2019, 06:28 PM
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Originally Posted by gregb5220 View Post
Curious, what would be any different?



Nothing is better than the select few who always suggest this. Maybe he dosen't have the manual. Maybe he already checked and didnt understand fully. Maybe his outboard didnt come with a manual. I have to think those who are asking are already past the manual part.
I suggest it because itís good advice.

Iíve seen people blindly follow winterization advice online, and end up with ruined engines in the spring.

No manual? Get one. Most of the time you can get a PDF version for free, or very little money.
Old 12-03-2019, 06:48 PM
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Always run on the muffs for my F200 at the end of the season & store vertical. After it looks like it has drained, I disconnect the flush port, & the last little bit of water drains out, then reconnect the port.
John
Old 12-03-2019, 07:27 PM
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Originally Posted by Misterfu02 View Post
I suggest it because itís good advice.

Iíve seen people blindly follow winterization advice online, and end up with ruined engines in the spring.

No manual? Get one. Most of the time you can get a PDF version for free, or very little money.
99% of the time you can find them online, for free

good advice to follow the manual!

every boat owner should have manuals. some even should consider getting the service/shop manual.

most outboards self-drain, very few don't
Old 12-03-2019, 07:30 PM
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Thanks for the replies guys. I already have the motors all the way down and the flush port disconnected. Iím ok with fogging the engine and and everything else that needs to be done. My friend told me I needed to run antifreeze through it as well. It is good to know itís not required

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